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Université de Neuchâtel
1.
Comunian, Alessandro.
Probability aggregaton methods and multiple-point statistics
for 3D modeling of aquifer heterogeneity from 2D training
images.
Degree: 2011, Université de Neuchâtel
URL: http://doc.rero.ch/record/21700
► Multiple-point statistics (MPS) is a rising method for the characterization of heterogeneity. Its strength and its Achilles' heel lie in the training image, which is…
(more)
▼ Multiple-point statistics (MPS) is a rising method for
the characterization of heterogeneity. Its strength and its
Achilles' heel lie in the training image, which is the conceptual
model of geological heterogeneity on which MPS simulations are
based. Indeed, on one side the use of the training image allows
great flexibility when for example for bi-dimensional (2D)
simulation a training image can be provided by a photo-mosaic of an
outcrop or by a sketch drawn by a geologist. On the other side, in
three-dimensions (3D) a training image is rarely available.
When the information provided by a 3D image is
not accessible, then one must somehow use probabilistic information
which comes from lower dimen- sion sources, like for example 2D
training images. If different 2D sources of information are
available, one possibility is to aggregate the corresponding
probability information. This problem is very general and several
methods exist. Two main categories of methods are distinguished:
those based on the sum (convex) and those based on the
multiplication (non-convex). When the weighting factors can be
determined from some training data, the best reliabilities are
obtained with the Beta-transformed linear pool and the Bor- diey's
formula. Instead, when training data are not accessible, reasonably
reliable results can be obtained with the Bordley's formula and
with the Markovian-type categorical prediction.
One convex method and one non-convex method
are tested for the ag- gregation of information coming from 2D
training images. For the tests, one 3D image of a micro-computed
tomography of a sandstone and one 3D realization of a
fluvio-glacial environment are used as references. Two di-
mensional slices of the reference 3D images are used as training
images for providing the information to be aggregated with the
methods cited above, but also for the simulation with two novel
method proposed here. One of this methods is baaed on sequential 2D
simulations conditioned by the data computed during the previous
simulation steps (method s2Dcd). With this last method it is
possible to obtain , without the use of a 3D training im- age, 3D
simulations which can be considered close to the reference images
according to most comparison criteria considered. Moreover, while
the re- sults obtained with the method s2Dcd are close to the
results obtained with a MPS simulation which make use of a 3D
training image, the CPU time required by s2Dcd is from two to four
orders of magnitude smaller than with a traditional 3D simulation.
This computational efficiency is a step forward for the
introduction of MPS in frameworks which require a great number of
realizations in a reasonably restricted amount of time, like for
example Monte Carlo methods or stochastic inverse problems.
Other techniques exists to deal with the
simulation in 3D when a 3D training image is not available. One of
this techniques, developed in this thesis' framework, is applied
for the simulation of the image of the fluvio- glacial
aquifer
analog used as…
Advisors/Committee Members: Philippe (Dir.), Julien (Codir.).
Subjects/Keywords: aquifer characterization
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Comunian, A. (2011). Probability aggregaton methods and multiple-point statistics
for 3D modeling of aquifer heterogeneity from 2D training
images. (Thesis). Université de Neuchâtel. Retrieved from http://doc.rero.ch/record/21700
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Comunian, Alessandro. “Probability aggregaton methods and multiple-point statistics
for 3D modeling of aquifer heterogeneity from 2D training
images.” 2011. Thesis, Université de Neuchâtel. Accessed April 14, 2021.
http://doc.rero.ch/record/21700.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Comunian, Alessandro. “Probability aggregaton methods and multiple-point statistics
for 3D modeling of aquifer heterogeneity from 2D training
images.” 2011. Web. 14 Apr 2021.
Vancouver:
Comunian A. Probability aggregaton methods and multiple-point statistics
for 3D modeling of aquifer heterogeneity from 2D training
images. [Internet] [Thesis]. Université de Neuchâtel; 2011. [cited 2021 Apr 14].
Available from: http://doc.rero.ch/record/21700.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Comunian A. Probability aggregaton methods and multiple-point statistics
for 3D modeling of aquifer heterogeneity from 2D training
images. [Thesis]. Université de Neuchâtel; 2011. Available from: http://doc.rero.ch/record/21700
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University
2.
Woody, Jen.
A preliminary assessment of hydrogeologic suitability for Aquifer Storage and
Recovery (ASR) in Oregon.
Degree: MS, Geology, 2008, Oregon State University
URL: http://hdl.handle.net/1957/7453
► An ASR metric and site rating index applied to over 120 municipal and agricultural locations across Oregon, combined with comparison to case study data from…
(more)
▼ An ASR metric and site rating index applied to over 120 municipal and
agricultural locations across Oregon, combined with comparison to case study data from
existing ASR sites, indicate that more than 50% of selected sites are hydrogeologically
suitable for ASR. The ASR metric is a ratio of
aquifer storage to the rate at which surface
water is available for injection, with a result greater than one indicating sufficient
aquifer
storage. The site rating index evaluates
aquifer hydraulic parameters as well as economic
and engineering factors, and produces a percentage of ideal conditions. While economic
and engineering factors can determine ASR feasibility, transmissivity, depth to static
groundwater level and the desired injection rate are the controlling hydraulic parameters
for hydrogeologic ASR suitability. However, these factors have a flexible relationship;
for example, high transmissivity can compensate for small depth to groundwater and vice
versa.
In Oregon, most existing ASR sites target Columbia River Basalt interflow zones,
where transmissivity is high and native groundwater quality is generally suitable for
drinking water. These units are also prone to groundwater decline due to over-pumping,
which essentially creates storage for ASR. Results show that suitable potential sites
correspond predominantly with Columbia River Basalt, Quaternary and late Tertiary
sediments. Potential
aquifer storage identified by this study is approximately equal to Oregon's annual public water supply in the year 2000, or 5 x 10⁸ m³ (160 billion gallons
or 502,809 ac-ft). This suggests that ASR expansion in Oregon can significantly increase
public supply and provide flexibility in the timing of water availability.
Advisors/Committee Members: Haggerty, Roy (advisor), Jarvis, Todd (committee member).
Subjects/Keywords: aquifer storage recovery; Aquifer storage recovery – Oregon
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Woody, J. (2008). A preliminary assessment of hydrogeologic suitability for Aquifer Storage and
Recovery (ASR) in Oregon. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/7453
Chicago Manual of Style (16th Edition):
Woody, Jen. “A preliminary assessment of hydrogeologic suitability for Aquifer Storage and
Recovery (ASR) in Oregon.” 2008. Masters Thesis, Oregon State University. Accessed April 14, 2021.
http://hdl.handle.net/1957/7453.
MLA Handbook (7th Edition):
Woody, Jen. “A preliminary assessment of hydrogeologic suitability for Aquifer Storage and
Recovery (ASR) in Oregon.” 2008. Web. 14 Apr 2021.
Vancouver:
Woody J. A preliminary assessment of hydrogeologic suitability for Aquifer Storage and
Recovery (ASR) in Oregon. [Internet] [Masters thesis]. Oregon State University; 2008. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1957/7453.
Council of Science Editors:
Woody J. A preliminary assessment of hydrogeologic suitability for Aquifer Storage and
Recovery (ASR) in Oregon. [Masters Thesis]. Oregon State University; 2008. Available from: http://hdl.handle.net/1957/7453

Addis Ababa University
3.
YONAS, MULUGETA.
Hydrogeological investigation of Chacha Catchment a volcanic aquifer system, central Ethiopia
.
Degree: 2013, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/875
► Hydrogeological investigation of Chacha catchment, a volcanic aquifer system is carried out on Chacha river shade which is situated about 105 km north east of…
(more)
▼ Hydrogeological investigation of Chacha catchment, a volcanic
aquifer system is carried out on Chacha river shade which is situated about 105 km north east of Addis Ababa on the way to Debre Berhan and covers an area of about 1194 sq.Km with a considerable elevation difference from 700-3500 m.a.s.l and an average elevation of 2728m.River gorge, gentle slope and highland characterize the physiograph of the catchment The catchment gets 939 mm of annual mean rainfall and 13-15.6 °c average annual temperature. Potential evapotranspiration (PET) is estimated empirically 1141mm/yr. The area has two rainfall regimes (bimodal rainfall characteristics). Recent Quaternery deposits, Tertiary Ignimbrites, Basalts, Tertiary Sediments and Mesozoic Sandstone constitute the stratigraphy of the area from the youngest to the oldest respectively. The
aquifer system has been defined based on hydrogeological characteristics of lithological units described by the geological maps and data from the field inventory. The hydrogeological characterization of the area revealed the following
aquifer / aquitard system: •.Porous
aquifer developed in alluvial and colluvial sediments of the plateau, Tertiary sediments, Pyroclastics and Mesozoic sandstone in deep valleys.(T=10-100 sq.m/d and Q=1-5 l/s) •Fissured
aquifer developed in basalts on plateau and deep valleys.(T=10-100 sq.m/d and Q=1-5l/s) •Mixed
aquifer developed in fissured Ignimbrite and Basalt and porous Tertiary Sediments intercalating volcanic rocks on plateau. (T=10-100 sq.m/d and Q=1-5l/s) •Aquitards developed in Ignimbrites forming water shed mountains along plateau – rift valley edge. (T = 1 – 0.1sq.m/d and Q = 0.05 - 0.5 l/s) The water type in the Chacha catchment is predominantly calcium bicarbonate. Groundwater of the study area is generally suitable for Drinking water supply and irrigation. Generally, the area has enormous surface water and ground water resources thus intensive sustainable water resources development is recommended by sinking dugwells and shallow wells not more than 60m depth on the plateau and small valleys. Springs can be developed on the flat plain and escarpments of the deep gorges. Drilled wells in the range of 100-150m are recommended for town water supply schemes. In addition to water supply, large scale irrigation and hydroelectric power development in Chacha catchment using available water resource specially ground water is possible.
Advisors/Committee Members: Dr. Tenalem Ayenew, (advisor).
Subjects/Keywords: Chacha;
Porous aquifer
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
YONAS, M. (2013). Hydrogeological investigation of Chacha Catchment a volcanic aquifer system, central Ethiopia
. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/875
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
YONAS, MULUGETA. “Hydrogeological investigation of Chacha Catchment a volcanic aquifer system, central Ethiopia
.” 2013. Thesis, Addis Ababa University. Accessed April 14, 2021.
http://etd.aau.edu.et/dspace/handle/123456789/875.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
YONAS, MULUGETA. “Hydrogeological investigation of Chacha Catchment a volcanic aquifer system, central Ethiopia
.” 2013. Web. 14 Apr 2021.
Vancouver:
YONAS M. Hydrogeological investigation of Chacha Catchment a volcanic aquifer system, central Ethiopia
. [Internet] [Thesis]. Addis Ababa University; 2013. [cited 2021 Apr 14].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/875.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
YONAS M. Hydrogeological investigation of Chacha Catchment a volcanic aquifer system, central Ethiopia
. [Thesis]. Addis Ababa University; 2013. Available from: http://etd.aau.edu.et/dspace/handle/123456789/875
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waikato
4.
Muller, Joshua Alois.
Influence of Vegetation Cover on Coastal Aquifer Fluctuation and Sand Transport on Matakana Island
.
Degree: 2011, University of Waikato
URL: http://hdl.handle.net/10289/5760
► The Bay of Plenty beaches on the east coast of the North Island, New Zealand are of significant physical, ecological and economic importance. Over the…
(more)
▼ The Bay of Plenty beaches on the east coast of the North Island, New Zealand are of significant physical, ecological and economic importance. Over the previous century, anthropogenic development and the introduction of non-indigenous coastal plant species has lead to a degradation of many of the Bay of Plenty regions’ coastal dune environments. Restoring these sections of coastline to their natural state strengthens the barrier they provide between coastal developments and the coastal ocean, whilst also promoting the growth of native plant species and improving habitat for local macro-invertebrate species. The influence of vegetation on
aquifer levels and aeolian sediment transport in the dune and foredune was investigated at Matakana Island in the Western Bay of Plenty. Monitoring of the water table between March and November 2010 was undertaken at two adjacent sample sites, with different dominant overlying vegetation, Ammophila arenaria and Spinifex sericeus. During this time, aeolian sediment transport rates were also monitored through the deployment of sediment traps and two small climate stations. Results showed that
aquifer levels beneath the dune face were highly variable. Fluctuations occurred at a range of time scales, stemming from variations in tide, rainfall and profile shape. Short-term fluctuation was primarily linked to tidal forcing. Tidal fluctuations were observed in the
aquifer, and differed from tidal fluctuations directly offshore in their shape and amplitude, with some lag between tide and
aquifer fluctuations also evident.
Aquifer fluctuation shape and lag, and differences between sample sites were linked to the beach drainage capability through
aquifer porosity and permeability; hydraulic conductivity; and transmissivity. Long-term change in beach profile shape further influenced
aquifer levels, with an accreting beach resulting in an elevating average
aquifer level and an eroding beach resulting in a diminishing
aquifer level. Aeolian sediment deposition varied greatly across the cross-shore profile. Transport rates were limited by a small beach width when high tides combined with storm surge and wave run-ups limiting the source area. Rainfall further reduced transport potential when coinciding with high wind speed events. Sediment deposition was evenly distributed in the Spinifex dominated dune system, whilst deposition in the Ammophila dune primarily occurred at the seaward limit of vegetation growth. This pattern of deposition is linked to the characteristics of each species, primarily their average height and growth density. Sediment deposition differences between sites explain variances in sediment compaction which alters dune porosity and permeability at each site. Greater porosity and permeability in the Spinifex dominated dune saw the
aquifer draining more readily. Lower beach
aquifer levels aid accretion and greaten the source for onshore aeolian sediment transport. Spinifex dominated dunes are therefore suggested to provide healthier beach states on Bay of Plenty beaches.
Advisors/Committee Members: de Lange, Willem P (advisor).
Subjects/Keywords: Coastal;
Aquifer Fluctuation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Muller, J. A. (2011). Influence of Vegetation Cover on Coastal Aquifer Fluctuation and Sand Transport on Matakana Island
. (Masters Thesis). University of Waikato. Retrieved from http://hdl.handle.net/10289/5760
Chicago Manual of Style (16th Edition):
Muller, Joshua Alois. “Influence of Vegetation Cover on Coastal Aquifer Fluctuation and Sand Transport on Matakana Island
.” 2011. Masters Thesis, University of Waikato. Accessed April 14, 2021.
http://hdl.handle.net/10289/5760.
MLA Handbook (7th Edition):
Muller, Joshua Alois. “Influence of Vegetation Cover on Coastal Aquifer Fluctuation and Sand Transport on Matakana Island
.” 2011. Web. 14 Apr 2021.
Vancouver:
Muller JA. Influence of Vegetation Cover on Coastal Aquifer Fluctuation and Sand Transport on Matakana Island
. [Internet] [Masters thesis]. University of Waikato; 2011. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/10289/5760.
Council of Science Editors:
Muller JA. Influence of Vegetation Cover on Coastal Aquifer Fluctuation and Sand Transport on Matakana Island
. [Masters Thesis]. University of Waikato; 2011. Available from: http://hdl.handle.net/10289/5760

Delft University of Technology
5.
van Loenen, Gerrit (author).
The effect of impurity of CO2 stream on enhanced gas dissolution.
Degree: 2017, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:69490eaa-6a02-41dc-bb87-31cd27bf468e
► One of the methods of reducing the amount of CO2 in the air is CO2 sequestration by dissolving the gas underground in an aquifer. In…
(more)
▼ One of the methods of reducing the amount of CO2 in the air is CO2 sequestration by dissolving the gas underground in an
aquifer. In practice,there will be impurity gases in the injected CO2 stream or in the
aquifer, which influence the dissolution rate of the CO2 stream. This research aims at finding a method to evaluate and calculate this influence. We focused on H2S and CH4. We found that given the specific circumstances underground and with added impurity gases, it is advisable to use an Equation of State, for which we chose Peng-Robinson. For the first simulation with a large
aquifer model, we were able to see the difference between a stream of pure CO2 and mixtures of CO2 with H2S and CH4 respectively. We observed that the gas stream with CH4 moved considerably faster along the
aquifer than the streams of pure CO2 or CO2 mixed with H2S. On the other hand, we found that the dissolution rate was higher when H2S was present in the mixture. In the dissolution process, we see a large influence of instabilities on the dissolution rate as a result of density differences in the
aquifer. However, the resolution of the large
aquifer model did not allow to evaluate this influence sufficiently. In two consequent steps, we adapted our simulation model. First, we used a small scale model using only a fraction of the large
aquifer model, thus considerably reducing the calculation time. Next, we increase the resolution of the small scale model. This higher resolution gave considerably more accurate results, reflecting the differences between the three cases and the influence of the instabilities in the
aquifer. We concluded that the simulation based on the small scale and high resolution model yields accurate and reliable results. However, the calculated outcomes have to be corrected for the difference in boundary conditions between the large and small scale models.
Advisors/Committee Members: Voskov, Denis (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: CO2; dissolution; aquifer
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
van Loenen, G. (. (2017). The effect of impurity of CO2 stream on enhanced gas dissolution. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:69490eaa-6a02-41dc-bb87-31cd27bf468e
Chicago Manual of Style (16th Edition):
van Loenen, Gerrit (author). “The effect of impurity of CO2 stream on enhanced gas dissolution.” 2017. Masters Thesis, Delft University of Technology. Accessed April 14, 2021.
http://resolver.tudelft.nl/uuid:69490eaa-6a02-41dc-bb87-31cd27bf468e.
MLA Handbook (7th Edition):
van Loenen, Gerrit (author). “The effect of impurity of CO2 stream on enhanced gas dissolution.” 2017. Web. 14 Apr 2021.
Vancouver:
van Loenen G(. The effect of impurity of CO2 stream on enhanced gas dissolution. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Apr 14].
Available from: http://resolver.tudelft.nl/uuid:69490eaa-6a02-41dc-bb87-31cd27bf468e.
Council of Science Editors:
van Loenen G(. The effect of impurity of CO2 stream on enhanced gas dissolution. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:69490eaa-6a02-41dc-bb87-31cd27bf468e
6.
Eckhoff, Ingrid J.
Geologic and Geochemical Characterization of Cross-Communication Potential within the Northern Edwards Aquifer System, Texas.
Degree: MS- Geology, Geology, 2016, Stephen F. Austin State University
URL: https://scholarworks.sfasu.edu/etds/59
► The Edwards Aquifer is a large, complex groundwater system located throughout Central Texas in association with the Balcones Fault Zone. The San Antonio and…
(more)
▼ The Edwards
Aquifer is a large, complex groundwater system located throughout Central Texas in association with the Balcones Fault Zone. The San Antonio and Barton Spring segments of the Edwards
Aquifer have been extensively studied in the past because they provide groundwater resources to the largely urbanized areas of San Antonio and Austin, respectively, and smaller communities along the Interstate 35 corridor. Previous research has been conducted on these southern and central portions of the Edwards
Aquifer system, which have characterized the structural, hydrogeological and geochemical variations within the highly karsted region. However, the Northern Segment of the Edwards
Aquifer primarily consists of undeveloped rural land, and is therefore lacking sufficient studies to fully understand the structural, hydrogeological, and geochemical systems in this region. LIDAR (Light Detection and Ranging) and remote sensing analyses have enabled identification and delineation of spatial distribution of fractures and karstic features visible at the surface, and provided valuable information regarding the understanding of potential cross-communication between
aquifer systems. Water quality data from water wells of the Edwards and Trinity aquifers were extracted from the Groundwater Database of the Texas Water Development Board. ArcGIS was utilized to generate geochemical maps for spatial distribution and correlation purposes. Evidence for probable cross-communication between
aquifer systems is discernable when examining the directional trend of constituents and comparing them to highly dense areas of lineaments and sinkhole features. Results from this study provide essential data that can be used in the refinement of groundwater characterization for the northern extent of the Edwards
Aquifer System
Advisors/Committee Members: Dr. Kevin Stafford, Dr. Wesley Brown, Dr. Melinda Faulkner.
Subjects/Keywords: aquifer cross-communication; Edwards Aquifer; Trinity Aquifer; GIS; geochemistry; hydrogeology; Geology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Eckhoff, I. J. (2016). Geologic and Geochemical Characterization of Cross-Communication Potential within the Northern Edwards Aquifer System, Texas. (Masters Thesis). Stephen F. Austin State University. Retrieved from https://scholarworks.sfasu.edu/etds/59
Chicago Manual of Style (16th Edition):
Eckhoff, Ingrid J. “Geologic and Geochemical Characterization of Cross-Communication Potential within the Northern Edwards Aquifer System, Texas.” 2016. Masters Thesis, Stephen F. Austin State University. Accessed April 14, 2021.
https://scholarworks.sfasu.edu/etds/59.
MLA Handbook (7th Edition):
Eckhoff, Ingrid J. “Geologic and Geochemical Characterization of Cross-Communication Potential within the Northern Edwards Aquifer System, Texas.” 2016. Web. 14 Apr 2021.
Vancouver:
Eckhoff IJ. Geologic and Geochemical Characterization of Cross-Communication Potential within the Northern Edwards Aquifer System, Texas. [Internet] [Masters thesis]. Stephen F. Austin State University; 2016. [cited 2021 Apr 14].
Available from: https://scholarworks.sfasu.edu/etds/59.
Council of Science Editors:
Eckhoff IJ. Geologic and Geochemical Characterization of Cross-Communication Potential within the Northern Edwards Aquifer System, Texas. [Masters Thesis]. Stephen F. Austin State University; 2016. Available from: https://scholarworks.sfasu.edu/etds/59

Mississippi State University
7.
Wilhelms, Steven Christopher.
Impact of a regulatory threat toward agricultural water use in the Mississippi Delta: An experimental approach.
Degree: MS, Agricultural Economics, 2018, Mississippi State University
URL: http://sun.library.msstate.edu/ETD-db/theses/available/etd-03132018-120948/
;
► Due to increased adoption of irrigation and advancements in technology, producers in the Mississippi Delta have been unsustainably depleting the water stocks in the Mississippi…
(more)
▼ Due to increased adoption of irrigation and advancements in technology, producers in the Mississippi Delta have been unsustainably depleting the water stocks in the Mississippi River Valley Alluvial
Aquifer (MRVAA). This research investigates the impacts of various regulatory threats uniformly applied to heterogeneously located producers to avert further overexploitation of the MRVAA. If a regulatory threat successfully incentivizes reduction of producers extraction rates, costly implementation of a binding limited-use regulation could be avoided. Laboratory experiments incorporating the major characteristics of the MRVAA were conducted to test two threatened uniform policies, limited-use and moratorium. The main finding of the research is that even with the threat of a moratorium, the regulatory trigger point was too lax to result in significantly slowing over exploitation of the water resource.
Advisors/Committee Members: Kalyn T. Coatney (chair), Anita M. Chaudhry (committee member), James N. Barnes (committee member).
Subjects/Keywords: aquifer; common pool resource
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wilhelms, S. C. (2018). Impact of a regulatory threat toward agricultural water use in the Mississippi Delta: An experimental approach. (Masters Thesis). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-03132018-120948/ ;
Chicago Manual of Style (16th Edition):
Wilhelms, Steven Christopher. “Impact of a regulatory threat toward agricultural water use in the Mississippi Delta: An experimental approach.” 2018. Masters Thesis, Mississippi State University. Accessed April 14, 2021.
http://sun.library.msstate.edu/ETD-db/theses/available/etd-03132018-120948/ ;.
MLA Handbook (7th Edition):
Wilhelms, Steven Christopher. “Impact of a regulatory threat toward agricultural water use in the Mississippi Delta: An experimental approach.” 2018. Web. 14 Apr 2021.
Vancouver:
Wilhelms SC. Impact of a regulatory threat toward agricultural water use in the Mississippi Delta: An experimental approach. [Internet] [Masters thesis]. Mississippi State University; 2018. [cited 2021 Apr 14].
Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-03132018-120948/ ;.
Council of Science Editors:
Wilhelms SC. Impact of a regulatory threat toward agricultural water use in the Mississippi Delta: An experimental approach. [Masters Thesis]. Mississippi State University; 2018. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-03132018-120948/ ;

University of Utah
8.
Miege, Clement.
Recent ice sheet snow accumulation and firn storage of meltwater inferred by ground and airborne radars.
Degree: PhD, Geography, 2015, University of Utah
URL: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3851/rec/2033
► Recent surface mass balance changes in space and time over the polar ice sheets need to be better constrained in order to estimate the ice-sheet…
(more)
▼ Recent surface mass balance changes in space and time over the polar ice sheets need to be better constrained in order to estimate the ice-sheet contribution to sea-level rise. The mass balance of any ice body is obtained by subtracting mass losses from mass gains. In response to climate changes of the recent decades, ice-sheet mass losses have increased, making ice-sheet mass balance negative and raising sea level. In this work, I better quantify the mass gained by snowfall across the polar ice sheets; I target specific regions over both Greenland and West Antarctica where snow accumulation changes are occurring due to rising air temperature. Southeast Greenland receives 30% of the total snow accumulation of the Greenland ice sheet. In this work, I combine internal layers observed in ice-penetrating radar data with firn cores to derive the last 30 years of accumulation and to measure the spatial pattern of accumulation toward the southeast coastline. Below 1800 m elevation, in the percolation zone, significant surface melt is observed in the summer, which challenges both firn-core dating and internal-layer tracing. While firn-core drilling at 1500 m elevation, liquid water was found at ~20-m depth in a firn aquifer that persisted over the winter. The presence of this water filling deeper pore space in the firn was unexpected, and has a significant impact on the ice sheet thermal state and the estimate of mass balance made using satellite altimeters. Using a 400-MHz ice-penetrating radar, the extent of this widespread aquifer was mapped on the ground, and also more extensively from the air with a 750-MHz airborne radar as part of the NASA Operation IceBridge mission. Over three IceBridge flight campaigns (2011-2013), based on radar data, the firn aquifer is estimated to cover ~30,000 km2 area within the wet-snow zone of the ice sheet. I use repeated flightlines to understand the temporal variability of the water trapped in the firn aquifer and to simulate its lateral flow, following the gentle surface slope (< 1�) and undulated topography of the ice sheet surface toward the ablation zone of the ice sheet. The fate of this water is currently unknown; water drainage into crevasses and at least partial runoff is inferred based on the analysis of radar profiles from different years. I also present results from a field expedition in West Antarctica, where data collection combined high-frequency (2-18 GHz) radar data and shallow (< 20 m) firn cores from Central West Antarctica, crossing the ice divide toward the Amundsen Sea. The radar-derived accumulation rates show a 75% increase (+0.20 m w.eq. y-1) of net snow accumulation from the ice divide, toward the Amundsen Sea for a 70-km transect, assuming annual isochrones being detected in the radar profile. On the Ross Sea side of the divide, with accumulation rates less than 0.25 m w.eq. y-1 and significant wind redistribution, only a multi-annual stratigraphy is detected in the radar profile. Using radar, I investigated the small-scale variability within a radius of ~1.5 km…
Subjects/Keywords: Antarctica; Aquifer; Firn; Greenland; Radar
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APA (6th Edition):
Miege, C. (2015). Recent ice sheet snow accumulation and firn storage of meltwater inferred by ground and airborne radars. (Doctoral Dissertation). University of Utah. Retrieved from http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3851/rec/2033
Chicago Manual of Style (16th Edition):
Miege, Clement. “Recent ice sheet snow accumulation and firn storage of meltwater inferred by ground and airborne radars.” 2015. Doctoral Dissertation, University of Utah. Accessed April 14, 2021.
http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3851/rec/2033.
MLA Handbook (7th Edition):
Miege, Clement. “Recent ice sheet snow accumulation and firn storage of meltwater inferred by ground and airborne radars.” 2015. Web. 14 Apr 2021.
Vancouver:
Miege C. Recent ice sheet snow accumulation and firn storage of meltwater inferred by ground and airborne radars. [Internet] [Doctoral dissertation]. University of Utah; 2015. [cited 2021 Apr 14].
Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3851/rec/2033.
Council of Science Editors:
Miege C. Recent ice sheet snow accumulation and firn storage of meltwater inferred by ground and airborne radars. [Doctoral Dissertation]. University of Utah; 2015. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3851/rec/2033

Anna University
9.
Bhagavathi perumal S.
Groundwater quality assessment and regional flow
modelling of kanyakumari colachel coastal aquifer tamilnadu
india;.
Degree: Groundwater quality assessment and regional flow
modelling of kanyakumari colachel coastal aquifer tamilnadu
india, 2014, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/30473
► Water sources have always been a precious commodity for human newlinelife The available source of surface water is limited moreover it is under newlinetremendous pressure…
(more)
▼ Water sources have always been a precious commodity
for human newlinelife The available source of surface water is
limited moreover it is under newlinetremendous pressure due to
pollution in many parts of the world In many newlineparts of India
groundwater is the major source for domestic agricultural and
newlineindustrial purposes Groundwater is under considerable stress
to fulfill all newlinethese needs which would ultimately lead to
deterioration of groundwater newlinequality Natural processes such
as flooding earthquakes tsunami seawater newlineintrusion and
rockwater interaction processes will all result in deterioration
newlineof groundwater quality newlineGroundwater is the major
source of water supply for many urban newlineareas including major
cities all over the world It has always been considered newlineas a
safe clean and lowcost source of water to these areas newline
newline
Reference p.141-150
Advisors/Committee Members: Thamarai P.
Subjects/Keywords: civil engineering; coastal aquifer; Groundwater
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
S, B. p. (2014). Groundwater quality assessment and regional flow
modelling of kanyakumari colachel coastal aquifer tamilnadu
india;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/30473
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
S, Bhagavathi perumal. “Groundwater quality assessment and regional flow
modelling of kanyakumari colachel coastal aquifer tamilnadu
india;.” 2014. Thesis, Anna University. Accessed April 14, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/30473.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
S, Bhagavathi perumal. “Groundwater quality assessment and regional flow
modelling of kanyakumari colachel coastal aquifer tamilnadu
india;.” 2014. Web. 14 Apr 2021.
Vancouver:
S Bp. Groundwater quality assessment and regional flow
modelling of kanyakumari colachel coastal aquifer tamilnadu
india;. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Apr 14].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/30473.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
S Bp. Groundwater quality assessment and regional flow
modelling of kanyakumari colachel coastal aquifer tamilnadu
india;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/30473
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Anna University
10.
Parimala renganayaki S.
Managed aquifer recharge An integrated approach for
assessing The impact of a check dam;.
Degree: Managed aquifer recharge An integrated approach for
assessing The impact of a check dam, 2015, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/49564
► Ever increasing demand for water has led to over exploitation of newlinegroundwater in several regions Managed Aquifer recharge MAR which is a newlinedeliberate method to…
(more)
▼ Ever increasing demand for water has led to over
exploitation of newlinegroundwater in several regions Managed
Aquifer recharge MAR which is a newlinedeliberate method to
increase the groundwater storage, need to be practiced in
newlineaquifers that are over stressed Check dam constructed across
the rivers is one newlineof the methods of MAR In arid or semi arid
regions the rivers flow only for a newlinefew days in a year non
perennial rivers during the monsoon The average newlinerainfall is
generally non uniform and most part of it falls in a relatively
short newlineperiod of time Hence large quantum of this rainfall
reaches the sea as runoff newlineand also results in flooding
during peak monsoonal rains In such a region newlineMAR by the
check dams will help in harvesting this surface runoff by
newlineincreasing the contact time between the water and the river
bed to facilitate newlinethe infiltration This improves the
groundwater recharge and reduces the newlinerunoff into the sea
Though there were many methods to assess the efficiency newlineof
MAR each method had given results in various perspectives Hence the
newlinepresent study was carried out to accurately assess the
impact of MAR on newlinegroundwater potential by an integrated
study comprising hydrological newlinehydrogeological
microbiological groundwater modeling and socio economic
newlinestudies in Chennai Tamil Nadu India newline
newline
appendix p133-136, reference
p137-147.
Advisors/Committee Members: Elango L.
Subjects/Keywords: Hydrogeological microbiological; Managed Aquifer recharge
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
S, P. r. (2015). Managed aquifer recharge An integrated approach for
assessing The impact of a check dam;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/49564
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
S, Parimala renganayaki. “Managed aquifer recharge An integrated approach for
assessing The impact of a check dam;.” 2015. Thesis, Anna University. Accessed April 14, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/49564.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
S, Parimala renganayaki. “Managed aquifer recharge An integrated approach for
assessing The impact of a check dam;.” 2015. Web. 14 Apr 2021.
Vancouver:
S Pr. Managed aquifer recharge An integrated approach for
assessing The impact of a check dam;. [Internet] [Thesis]. Anna University; 2015. [cited 2021 Apr 14].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/49564.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
S Pr. Managed aquifer recharge An integrated approach for
assessing The impact of a check dam;. [Thesis]. Anna University; 2015. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/49564
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University
11.
Bertrand, Danelle.
Fate of THMs in Columbia River basalts during aquifer storage and recovery.
Degree: MS, Civil Engineering, 2010, Oregon State University
URL: http://hdl.handle.net/1957/15438
► Use of basalt aquifers for aquifer storage and recovery (ASR) systems is increasing in the Pacific Northwest due to the large aerial extent of the…
(more)
▼ Use of basalt aquifers for
aquifer storage and recovery (ASR) systems is increasing in the Pacific Northwest due to the large aerial extent of the Columbia River Basalt Group and the suitability of basalts as ASR reservoirs. However, the degradation of trihalomethanes (THMs), potentially carcinogenic disinfection by-products present in the majority of treated ASR source water, has not been quantitatively studied directly in basalt aquifers which have unique physical and geochemical characteristics. This study uses data from three basalt ASR systems in Oregon to calculate THM degradation rates corrected for dilution. Major ion concentration data was used to analyze dilution in the absence of external tracers and reaction rates were calculated based on first-order kinetics and residence times within the
aquifer. Calculated total THM half-lives ranged over three orders of magnitude from approximately 20 to 8,000d. Overall, THM reaction rate trends were similar to those observed in non-basalt ASR systems with rates dependent on ASR redox conditions and higher reaction rates observed under more reducing conditions. Additionally, under anoxic and anaerobic conditions, higher reaction rates were observed for ASR cycles with higher TOC concentrations. Contradictory to results in non-basalt ASR systems, brominated THMs did not degrade more rapidly than chloroform in anoxic basalt ASR cycles.
Advisors/Committee Members: Wildenschild, Dorthe (advisor), Haggerty, Roy (committee member).
Subjects/Keywords: aquifer; Trihalomethanes – Northwest, Pacific
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APA ·
Chicago ·
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CSE |
Export
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Manager
APA (6th Edition):
Bertrand, D. (2010). Fate of THMs in Columbia River basalts during aquifer storage and recovery. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/15438
Chicago Manual of Style (16th Edition):
Bertrand, Danelle. “Fate of THMs in Columbia River basalts during aquifer storage and recovery.” 2010. Masters Thesis, Oregon State University. Accessed April 14, 2021.
http://hdl.handle.net/1957/15438.
MLA Handbook (7th Edition):
Bertrand, Danelle. “Fate of THMs in Columbia River basalts during aquifer storage and recovery.” 2010. Web. 14 Apr 2021.
Vancouver:
Bertrand D. Fate of THMs in Columbia River basalts during aquifer storage and recovery. [Internet] [Masters thesis]. Oregon State University; 2010. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1957/15438.
Council of Science Editors:
Bertrand D. Fate of THMs in Columbia River basalts during aquifer storage and recovery. [Masters Thesis]. Oregon State University; 2010. Available from: http://hdl.handle.net/1957/15438

University of Connecticut
12.
Brockmeyer, Daniel J., Mr.
Using Ground Penetrating Radar Signal Reflection to Model a Highly Transmissive Bedrock Aquifer.
Degree: MS, Environmental Engineering, 2012, University of Connecticut
URL: https://opencommons.uconn.edu/gs_theses/242
► The use of numerical modeling software to characterize groundwater contaminant fate and transport requires an understanding of the distribution of hydraulic properties of the…
(more)
▼ The use of numerical modeling software to characterize groundwater contaminant fate and transport requires an understanding of the distribution of hydraulic properties of the
aquifer. As the complexity of this distribution increases, a more sophisticated understanding is required. Modeling contaminant transport in bedrock aquifers requires that the spatial distributions of highly conductive geologic features are characterized along with the hydraulic transmissivities of those features (Shapiro, 2003). The goal of this research is to refine the numerical model of a highly transmissive crystalline
aquifer by characterizing the spatial variability of the hydraulic transmissivity using the attenuation of the ground penetrating radar (GPR) signal.
Slug tests were performed in ten bedrock wells, located within and surrounding a highly conductive zone. The transmissivities measured in these wells ranged from 1.5 E-1 ft
2/day to 4.2 E+2 ft
2/day; values greater than 100 ft
2/day were measured in four of the bedrock wells. A GPR survey was conducted over the well network and five transects were selected for further analysis. The location of the ten wells were projected onto the nearest GPR transects and the GPR data from each location were isolated for further analysis. A visual inspection GPR signal data indicates that the signal reflection increases at locations where high transmissivity values were measured. This relationship was attributed to an increased volume of fluid present within the fractures; a characteristic previously used to identify productive bedrock aquifers at multiple sites (e.g., Porsani, 2005, Halihan, 2008).
The correlation between the transmissivities and the analyzed signal was evaluated at the four locations where higher transmissivities were measured. No correlation was observed when all four points were included. When the data collected from well BW-18 were excluded from the analysis, a near perfect correlation was observed for the remaining three points. The transmissivity measured in BW-18 was the highest value measured onsite. This suggests that the aperture thickness, a characteristic which is not identified using GPR, may play a significant role in the distribution of transmissivities at this location.
The remaining GPR data were transformed to the corresponding hydraulic conductivity using a linear regression fitted to the three correlating points. The values calculated were used as the conductivity values for the model layer corresponding to the shallow bedrock. The resulting model was no more accurate than an identical model created using only the measured transmissivities.
Consistent with previous findings, this investigation determined that GPR data collected by surficial geophysical methods is capable of characterizing highly transmissive regions. Since the spatial variations in the aperture thickness are not identified using this method, it is not appropriate for sites where significant variation is expected. The high…
Advisors/Committee Members: Dr. Gary Robbins, Dr. Lanbo Liu, Dr. Amvrossios Bagtzoglou.
Subjects/Keywords: GPR; modeling; bedrock; aquifer
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Brockmeyer, Daniel J., M. (2012). Using Ground Penetrating Radar Signal Reflection to Model a Highly Transmissive Bedrock Aquifer. (Masters Thesis). University of Connecticut. Retrieved from https://opencommons.uconn.edu/gs_theses/242
Chicago Manual of Style (16th Edition):
Brockmeyer, Daniel J., Mr. “Using Ground Penetrating Radar Signal Reflection to Model a Highly Transmissive Bedrock Aquifer.” 2012. Masters Thesis, University of Connecticut. Accessed April 14, 2021.
https://opencommons.uconn.edu/gs_theses/242.
MLA Handbook (7th Edition):
Brockmeyer, Daniel J., Mr. “Using Ground Penetrating Radar Signal Reflection to Model a Highly Transmissive Bedrock Aquifer.” 2012. Web. 14 Apr 2021.
Vancouver:
Brockmeyer, Daniel J. M. Using Ground Penetrating Radar Signal Reflection to Model a Highly Transmissive Bedrock Aquifer. [Internet] [Masters thesis]. University of Connecticut; 2012. [cited 2021 Apr 14].
Available from: https://opencommons.uconn.edu/gs_theses/242.
Council of Science Editors:
Brockmeyer, Daniel J. M. Using Ground Penetrating Radar Signal Reflection to Model a Highly Transmissive Bedrock Aquifer. [Masters Thesis]. University of Connecticut; 2012. Available from: https://opencommons.uconn.edu/gs_theses/242

Delft University of Technology
13.
Jiang, Kaixuan (author).
The use of subsurface for thermal energy transport in district networks.
Degree: 2017, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:7f66c36f-c949-4758-907a-437799791758
► This study introduces a new concept of ATES system, which is called ATEST system, to fulfill the transport function while crossing the barriers in water…
(more)
▼ This study introduces a new concept of ATES system, which is called ATEST system, to fulfill the transport function while crossing the barriers in water transmission and pipe replacements. Firstly, analytical models were used to help understand the physical process and range the working conditions of the ATEST system. Then numerical models were used to prove the feasibility and the value of this new conceptual system. Acceptable system performance that can meet the heat demand was iterated in case simulation; and the economical advantages were identified by comparing it with traditional ATES systems. The ATEST system showed a greater practical value than the ATES system in: 1) solving the discrepancy between heat service and heat demand in space, and 2) crossing barriers where pipes cannot be buried. However, the system should be further modified in operation to acquire better performance and avoid practical problems.
Advisors/Committee Members: Bakker, Mark (mentor), Bloemendal, Martin (mentor), Hartog, Niels (mentor), van Breukelen, Boris (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: aquifer; thermal energy; transport
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APA ·
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MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Jiang, K. (. (2017). The use of subsurface for thermal energy transport in district networks. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:7f66c36f-c949-4758-907a-437799791758
Chicago Manual of Style (16th Edition):
Jiang, Kaixuan (author). “The use of subsurface for thermal energy transport in district networks.” 2017. Masters Thesis, Delft University of Technology. Accessed April 14, 2021.
http://resolver.tudelft.nl/uuid:7f66c36f-c949-4758-907a-437799791758.
MLA Handbook (7th Edition):
Jiang, Kaixuan (author). “The use of subsurface for thermal energy transport in district networks.” 2017. Web. 14 Apr 2021.
Vancouver:
Jiang K(. The use of subsurface for thermal energy transport in district networks. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Apr 14].
Available from: http://resolver.tudelft.nl/uuid:7f66c36f-c949-4758-907a-437799791758.
Council of Science Editors:
Jiang K(. The use of subsurface for thermal energy transport in district networks. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:7f66c36f-c949-4758-907a-437799791758

University of Houston
14.
-4286-7844.
Aquifer Compaction at Different Depths: Observations from a Vertical GPS Array at the University of Houston Coastal Center, Texas.
Degree: MS, Geophysics, 2016, University of Houston
URL: http://hdl.handle.net/10657/5405
► Observed GPS data shows that the University of Houston Coastal Center (UHCC) in the La Marque, TX area currently experiences localized subsidence at a steady-surficial…
(more)
▼ Observed GPS data shows that the University of Houston Coastal Center (UHCC) in the La Marque, TX area currently experiences localized subsidence at a steady-surficial rate of 0.5 to 1 cm/year. This study aims to understand the contribution of shallow (<10 m) sediments to the overall subsidence of the study area. GPS data, precipitation data, and groundwater head measurements were collected at the UHCC for two years (02/2014-02/2016). Ground deformation at 10, 20, 30, and 0 feet below the land surface (bls) were measured from four GPS stations and compared to rainfall and groundwater depth. This was done in order to identify possible correlations that may indicate different rates of ground deformation associated with each shallow subsurface layer.
Over the two year observational period at the UHCC, there was an overall vertical lowering trend of 3 to 4 mm/yr of the localized top
aquifer, with surficial inflation mitigating this vertical fall to 1 to 2 mm/yr. GPS-weather data comparisons indicated that rainfall of over two centimeters per day can cause abrupt changes in ground layer vertical displacement. Pressure, humidity, and temperature changes of the air were not good indicators of ground movement. GPS-well data comparisons also indicated that about 200 mm of groundwater-level fall is correlated to about 1 mm of vertical drop in the same top
aquifer. In general, groundwater movement has been found to dominate ground deformation of the shallow subsurface (<10 m).
Advisors/Committee Members: Wang, Guoquan (advisor), Robinson, Alexander C. (committee member), Lee, Hyongki (committee member).
Subjects/Keywords: AQUIFER; COMPACTION; GPS; Houston
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
-4286-7844. (2016). Aquifer Compaction at Different Depths: Observations from a Vertical GPS Array at the University of Houston Coastal Center, Texas. (Masters Thesis). University of Houston. Retrieved from http://hdl.handle.net/10657/5405
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Chicago Manual of Style (16th Edition):
-4286-7844. “Aquifer Compaction at Different Depths: Observations from a Vertical GPS Array at the University of Houston Coastal Center, Texas.” 2016. Masters Thesis, University of Houston. Accessed April 14, 2021.
http://hdl.handle.net/10657/5405.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
MLA Handbook (7th Edition):
-4286-7844. “Aquifer Compaction at Different Depths: Observations from a Vertical GPS Array at the University of Houston Coastal Center, Texas.” 2016. Web. 14 Apr 2021.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
-4286-7844. Aquifer Compaction at Different Depths: Observations from a Vertical GPS Array at the University of Houston Coastal Center, Texas. [Internet] [Masters thesis]. University of Houston; 2016. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/10657/5405.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Council of Science Editors:
-4286-7844. Aquifer Compaction at Different Depths: Observations from a Vertical GPS Array at the University of Houston Coastal Center, Texas. [Masters Thesis]. University of Houston; 2016. Available from: http://hdl.handle.net/10657/5405
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

University of Lund
15.
Gomez Lopez, Etzar.
Altiplanic aquifer exploration by multidisciplinary
methods : Addressing the basis of sustainable use of
groundwater.
Degree: 2019, University of Lund
URL: https://lup.lub.lu.se/record/dd42eea8-0984-47e6-8f29-db46fdefc953
;
https://portal.research.lu.se/ws/files/69813834/PhD_Thesis_full_EG.pdf
► The sustainable use of groundwater relies on building up three stages: exploration, development and management. The exploration is crucial to understand the capabilities and limitations…
(more)
▼ The sustainable use of groundwater relies on
building up three stages: exploration, development and management.
The exploration is crucial to understand the capabilities and
limitations of aquifer units; e.g. volume of available water and
potential yield, distinction of recharge and discharge zones, and
the groundwater quality are developed in this stage. In the
Altiplano, groundwater is probably the most important water
resource to supply domestic consumption and irrigation, since
surficial bodies have been affected by reductions linked to drought
events. The city of Oruro, Bolivia, in the Central Altiplano, is
supplied solely with groundwater from a porous aquifer that has
been utilized for decades; however, its hydrogeological
characteristics are not fully understood due to the scarcity of
data and limited resources to conduct long-term research. In order
to develop the exploration of the aquifer units to the north of
Oruro, this thesis presents studies aiming to fill gaps in the
knowledge about their hydrogeological characteristics. A
multidisciplinary approach including analysis of isotopic data and
geoelectrical surveys was applied in this thesis; results and
interpretations are based on data from previous studies and from
sampling and measurements conducted recently within this work. The
study subjects in this thesis include groundwater flow patterns
inferred through isotopic characteristics, deduction of some
geological features (fault mapping and delineation of bedrock) from
changes in resistivity and estimation of aquifer parameters
relating hydraulic properties and resistivity. Data acquisition
during this work consisted of sampling and analysing isotopic
compositions in water from precipitation, rivers and wells.
Likewise, resistivity was obtained from surveys using electrical
resistivity tomography and transient electromagnetic methods.Two
aquifers were identified in the study area: unconsolidated
sediments storing freshwater, currently under exploitation,
overlying fractured bedrock that holds hydrothermal flows
characterised by high temperature and salinity. Groundwater in the
aquifers comes mainly from precipitation on the mountains, forming
rivers that infiltrate laterally into the top aquifers, the natural
discharge could have been located outside the limits of the study
area, to the southwest; however, the cone of depression created by
the wellfield supplying Oruro captures a substantial part of this
groundwater. Isotopic characteristics of water in precipitation and
groundwater at different depths were analysed to infer four
circulation systems: (1) a shallow one receiving minor vertical
infiltration, (2) the main system circulating through the
unconsolidated sediments, (3) a transitional system between
sediments and bedrock and (4) the deepest one, circulating through
the bedrock fractures.Resistivity models obtained from
geoelectrical surveys were analysed to infer the depth of the
contact between sediments and bedrock; in the selected study area,
it varies from a couple of meters to ~200 m. The…
Subjects/Keywords: Groundwater; Geophysics; Isotopes; Aquifer; Hydrogeology
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Manager
APA (6th Edition):
Gomez Lopez, E. (2019). Altiplanic aquifer exploration by multidisciplinary
methods : Addressing the basis of sustainable use of
groundwater. (Doctoral Dissertation). University of Lund. Retrieved from https://lup.lub.lu.se/record/dd42eea8-0984-47e6-8f29-db46fdefc953 ; https://portal.research.lu.se/ws/files/69813834/PhD_Thesis_full_EG.pdf
Chicago Manual of Style (16th Edition):
Gomez Lopez, Etzar. “Altiplanic aquifer exploration by multidisciplinary
methods : Addressing the basis of sustainable use of
groundwater.” 2019. Doctoral Dissertation, University of Lund. Accessed April 14, 2021.
https://lup.lub.lu.se/record/dd42eea8-0984-47e6-8f29-db46fdefc953 ; https://portal.research.lu.se/ws/files/69813834/PhD_Thesis_full_EG.pdf.
MLA Handbook (7th Edition):
Gomez Lopez, Etzar. “Altiplanic aquifer exploration by multidisciplinary
methods : Addressing the basis of sustainable use of
groundwater.” 2019. Web. 14 Apr 2021.
Vancouver:
Gomez Lopez E. Altiplanic aquifer exploration by multidisciplinary
methods : Addressing the basis of sustainable use of
groundwater. [Internet] [Doctoral dissertation]. University of Lund; 2019. [cited 2021 Apr 14].
Available from: https://lup.lub.lu.se/record/dd42eea8-0984-47e6-8f29-db46fdefc953 ; https://portal.research.lu.se/ws/files/69813834/PhD_Thesis_full_EG.pdf.
Council of Science Editors:
Gomez Lopez E. Altiplanic aquifer exploration by multidisciplinary
methods : Addressing the basis of sustainable use of
groundwater. [Doctoral Dissertation]. University of Lund; 2019. Available from: https://lup.lub.lu.se/record/dd42eea8-0984-47e6-8f29-db46fdefc953 ; https://portal.research.lu.se/ws/files/69813834/PhD_Thesis_full_EG.pdf

California State University – Chico
16.
Davids, Jeffrey.
Spatial and Temporal Analysis of Stream Restoration Efforts in Depleted Aquifer Systems
.
Degree: 2011, California State University – Chico
URL: http://hdl.handle.net/10211.4/304
► ABSTRACT SPATIAL AND TEMPORAL ANALYSIS OF STREAM RESTORATION EFFORTS IN DEPLETED AQUIFER SYSTEMS by Jeffrey C. Davids Master of Science in Geosciences Hydrology/Hydrogeology Option California…
(more)
▼ ABSTRACT
SPATIAL AND TEMPORAL ANALYSIS OF STREAM RESTORATION
EFFORTS IN DEPLETED
AQUIFER SYSTEMS
by
Jeffrey C. Davids
Master of Science in Geosciences
Hydrology/Hydrogeology Option
California State University, Chico
Spring 2011
Recent declines in anadromous fish populations have led to several proposals
for improving stream health in relation to fisheries. Many of the streams in consideration
are impacted by a variety of intensive water uses including municipal, industrial, and
agricultural. Consequently, in many cases, the streams have been rendered artificially
ephemeral due to surface-water diversions and groundwater pumping. Decades of these
practices has caused a lowering of the underlying groundwater table and a subsequent
one-way connection between the stream and the
aquifer.
While extensive study has been conducted on how pumping impacts a stream
(via stream depletion factors and analogous approaches), relatively little has been done
to analyze how these systems can be restored to benefit fisheries. Specifically, how
effective is it to reintroduce water into these depleted streams? To help answer this
question, MODFLOW-2005 with the StreamFlow Routine Package (SFR2) was used to
examine the (1) time scales, (2) spatial extents, and (3) magnitudes of fishery benefits
obtained by reintroducing water into the streams of these historically depleted systems.
Furthermore, what are the sensitivities of the timing, spatial extent, and magnitude of
these benefits to changes in initial conditions,
aquifer geometry, riparian vegetation, and
aquifer and stream properties?
Three (3) distinct flow Regimes emerged during the course of the parametric
modeling investigation. First, Regime 1 occurs when the stream is discontinuous (i.e. dry
stream reaches) for both the initial and steady states. Second, a stream that is initially
discontinuous at the initial state that regains continuity as a new steady state is
approached is classified as a Regime 2. Lastly, a Regime 3 system is one were the stream
is fully continuous at both the initial and steady states.
In general, the spatial extent of fishery benefits increases as the system moves
from Regime 1 to Regime 2 to Regime 3. Restoration benefits in a Regime 1 system will
always have a limited, ???discontinuous??? extent. Regime 2 has the most transient spatial
extent, ranging from a discontinuous stream at the initial state to fully continuous stream
at steady state. It should be pointed out, however, that fully continuous is not
synonymous with fully recovered since the quantity and quality of the continuity are
extremely important as well. Finally, restoration in a Regime 3 system has the immediate
effect of full stream continuity, or maximum spatial extent.
The timescales of fishery benefits observed during the course of this
investigation range from the tens into the thousands of years and are a function of a
myriad of variables. Some of the most significantly influential timescale variables
considered include the size of the basin…
Advisors/Committee Members: Mehl, Steffen W (advisor).
Subjects/Keywords: Stream Restoration;
Depleted Aquifer Systems
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Davids, J. (2011). Spatial and Temporal Analysis of Stream Restoration Efforts in Depleted Aquifer Systems
. (Thesis). California State University – Chico. Retrieved from http://hdl.handle.net/10211.4/304
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Davids, Jeffrey. “Spatial and Temporal Analysis of Stream Restoration Efforts in Depleted Aquifer Systems
.” 2011. Thesis, California State University – Chico. Accessed April 14, 2021.
http://hdl.handle.net/10211.4/304.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Davids, Jeffrey. “Spatial and Temporal Analysis of Stream Restoration Efforts in Depleted Aquifer Systems
.” 2011. Web. 14 Apr 2021.
Vancouver:
Davids J. Spatial and Temporal Analysis of Stream Restoration Efforts in Depleted Aquifer Systems
. [Internet] [Thesis]. California State University – Chico; 2011. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/10211.4/304.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Davids J. Spatial and Temporal Analysis of Stream Restoration Efforts in Depleted Aquifer Systems
. [Thesis]. California State University – Chico; 2011. Available from: http://hdl.handle.net/10211.4/304
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Louisiana State University
17.
Vidrine, Matthew Ryan.
The Effectiveness of ISCO Injection Methods for Remediation of Groundwater.
Degree: MS, Environmental Sciences, 2017, Louisiana State University
URL: etd-04052017-092716
;
https://digitalcommons.lsu.edu/gradschool_theses/4560
► In-Situ Chemical Oxidation (ISCO) injections were performed at Petro Stopping Centers 10 (Petro) in December 2013 and June 2015. The methodology was direct injection of…
(more)
▼ In-Situ Chemical Oxidation (ISCO) injections were performed at Petro Stopping Centers 10 (Petro) in December 2013 and June 2015. The methodology was direct injection of a heavy oxidizer, RegenOx®, followed by a time-release oxygen compound, ORC Advanced®, into a plume of gasoline sitting on top of the water in the aquifer in hope that this remediate the aquifer. Both chemicals are registered trademarks of the Regenesis®
Company.
The levels of contaminates have dropped considerably. However, Petro has not achieved closure criteria according to RECAP standards. The site is classified as a GW-1B, subject to the most stringent of remediation standards, due to its ability to be used as a drinking water source. The analytical results show undulating contaminate levels, dropping to below detectable levels then resurging to levels above acceptable RECAP standards. Levels show steady decline in all the monitoring wells including downgradient monitoring wells. The undulating phenomenon can be explained by desorption of COCs, incidental spilling of gasoline, or the clay’s affinity for organics. Further investigation into the clay will provide a better idea of which hypothesis is closer to the truth. During a sampling event, 3/19/15, levels were below detectable concentrations in all samples. Lab error offers a possible explanation for this event, the site still has contamination on it, if that sampling event produced clean samples is highly suspect.
The injections were successful at bringing gasoline contaminate concentrations down directly after an injection period. The method is effective and easy to apply. The resurgence of contaminates at this site is up for discussion and further study but, the method of remediation used at Petro is an effective tool in remediating a gasoline contaminated aquifer. Suggestions for improving the effectiveness of this method with the use of other injection materials in conjunction with the chemicals used in this project are mentioned in the discussion and conclusion sections of this thesis. Data referenced in this thesis is publicly available at the Louisiana Department of Environmental Quality document search website EDMS under the Agency Interest(AI) number 5962.
Subjects/Keywords: ISCO; Remediation; Aquifer; Groundwater Remediation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Vidrine, M. R. (2017). The Effectiveness of ISCO Injection Methods for Remediation of Groundwater. (Masters Thesis). Louisiana State University. Retrieved from etd-04052017-092716 ; https://digitalcommons.lsu.edu/gradschool_theses/4560
Chicago Manual of Style (16th Edition):
Vidrine, Matthew Ryan. “The Effectiveness of ISCO Injection Methods for Remediation of Groundwater.” 2017. Masters Thesis, Louisiana State University. Accessed April 14, 2021.
etd-04052017-092716 ; https://digitalcommons.lsu.edu/gradschool_theses/4560.
MLA Handbook (7th Edition):
Vidrine, Matthew Ryan. “The Effectiveness of ISCO Injection Methods for Remediation of Groundwater.” 2017. Web. 14 Apr 2021.
Vancouver:
Vidrine MR. The Effectiveness of ISCO Injection Methods for Remediation of Groundwater. [Internet] [Masters thesis]. Louisiana State University; 2017. [cited 2021 Apr 14].
Available from: etd-04052017-092716 ; https://digitalcommons.lsu.edu/gradschool_theses/4560.
Council of Science Editors:
Vidrine MR. The Effectiveness of ISCO Injection Methods for Remediation of Groundwater. [Masters Thesis]. Louisiana State University; 2017. Available from: etd-04052017-092716 ; https://digitalcommons.lsu.edu/gradschool_theses/4560

University of Texas – Austin
18.
Hernandez, Angelica Maria.
Observations of buoyant plumes in countercurrent displacement.
Degree: MSin Engineering, Petroleum Engineering, 2011, University of Texas – Austin
URL: http://hdl.handle.net/2152/ETD-UT-2011-12-4521
► Leakage of stored bulk phase CO₂ is of particular risk to sequestration in deep saline aquifers due to the fact that when injected into typical…
(more)
▼ Leakage of stored bulk phase CO₂ is of particular risk to sequestration in deep saline aquifers due to the fact that when injected into typical saline aquifers, the CO₂ rich gas phase has lesser density than the aqueous phase resulting in buoyancy driven flow of the fluids. As the CO₂ migrates upward, the security of its storage depends upon the trapping mechanisms that counteract the migration. While there are a variety of trapping mechanisms the mechanism serving as motivation for this research is local capillary trapping. Local capillary trapping occurs during buoyancy-driven migration of bulk phase CO₂ within a saline
aquifer (Saadatpoor, 2009). When the rising CO₂ plume encounters a region where capillary entry pressure is locally larger than average, CO₂ accumulates beneath the region. While research is continued by means of numerical simulation, research at the bench scale is needed to validate the conclusions made from simulation work. Presented is the development of a bench scale experiment whose objective is to assess local capillary trapping. The initial step in accomplishing this objective is to understand the fluid dynamics of CO₂ and brine in a saline
aquifer which is categorized as two phase immiscible buoyancy driven displacement. Parameters influencing this displacement include density, viscosity, wettability and heterogeneity. A bench scale environment created to be analogous to CO₂ and brine in a saline
aquifer is created in a quasi-two dimensional experimental apparatus, which allows for observation of plume migration at ambient conditions. A fluid pair analogous to supercritical CO₂ and brine is developed to mimic the density and viscosity relationship found at pressure and temperature typical of storage aquifers. The influences of viscosity ratio, density differences, porous medium wettability and heterogeneity are observed in series of experimental sequences. Three different fluid pairs with different viscosity ratios and density differences are used to assess density and viscosity influences. Porous media of varying grain size and wettability are used to assess the influence of heterogeneity and wettability. Results are qualitatively consistent with theoretical results and those from previous works.
Advisors/Committee Members: Bryant, Steven L. (advisor), Sepehrnoori, Kamy (committee member).
Subjects/Keywords: CO2; Buoyancy; Deep saline aquifer
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hernandez, A. M. (2011). Observations of buoyant plumes in countercurrent displacement. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2011-12-4521
Chicago Manual of Style (16th Edition):
Hernandez, Angelica Maria. “Observations of buoyant plumes in countercurrent displacement.” 2011. Masters Thesis, University of Texas – Austin. Accessed April 14, 2021.
http://hdl.handle.net/2152/ETD-UT-2011-12-4521.
MLA Handbook (7th Edition):
Hernandez, Angelica Maria. “Observations of buoyant plumes in countercurrent displacement.” 2011. Web. 14 Apr 2021.
Vancouver:
Hernandez AM. Observations of buoyant plumes in countercurrent displacement. [Internet] [Masters thesis]. University of Texas – Austin; 2011. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/2152/ETD-UT-2011-12-4521.
Council of Science Editors:
Hernandez AM. Observations of buoyant plumes in countercurrent displacement. [Masters Thesis]. University of Texas – Austin; 2011. Available from: http://hdl.handle.net/2152/ETD-UT-2011-12-4521

Universiteit Utrecht
19.
Lidth de Jeude, E.J. van.
Managed aquifer recharge: Opportunities and barriers.
Degree: 2016, Universiteit Utrecht
URL: http://dspace.library.uu.nl:8080/handle/1874/337161
► This multi-disciplinary study analyzed the barriers and opportunities of managed aquifer recharge (MAR) in the world. Managed aquifer recharge (MAR) is a collective name for…
(more)
▼ This multi-disciplinary study analyzed the barriers and opportunities of managed
aquifer recharge (MAR) in the world. Managed
aquifer recharge (MAR) is a collective name for techniques that infiltrate and store water in an
aquifer. Increasing water scarcity and high net groundwater abstraction rates are challenging issues now and in the future. Currently two-third of the global population experiences water scarcity at least once a month. In a world with increasing water issues, adequate water management becomes more vital. Groundwater users and ecosystems suffer from the consequences of inadequate groundwater management. Global population growth will increase the pressure on groundwater sources and in combination with climate change, water supply and demand will show increasing fluctuations. MAR could bring solutions to regions with water scarcity and groundwater management issues worldwide. The focus of this study is on identifying hydrogeological, climate, socioeconomic and institutional boundary conditions for MAR. These conditions are compared with a database of existing MAR projects. This specific comparison leads to new data in this area of research. It creates new insights of the barriers and opportunities for MAR worldwide.
The study shows an inventory of the 14 available MAR techniques and the (boundary) conditions for each technique. Other products are a set of 12 different hydrogeological boundary conditions, 23 relevant cost factors and 17 objectives for using MAR. There are 22 opportunities and 22 barriers to the implementation of MAR, for hydrogeological, climate, socioeconomic and institutional settings. The greatest opportunity can be found in arid and semi-arid regions because 1) they have the highest need for MAR and because 2) current practices are more seen in humid regions.
The scientific insights provided by this study can add clarity to science, as much of the knowledge on MAR was more fragmented up till now. In addition, the study clearly shows that there are still several knowledge gaps in the field of MAR and that further MAR potential studies are recommended. This study could help education programs on water storage and retention worldwide, in showing the importance of the adequate management of aquifers, including the barriers that might have to be overcome. This study clarifies the importance of adequate implementation of MAR techniques worldwide. Found insights can form a new direction in groundwater policy worldwide.
Advisors/Committee Members: Bierkens, M.F.P..
Subjects/Keywords: managed aquifer recharge; groundwater; aquifer management; water scarcity
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lidth de Jeude, E. J. v. (2016). Managed aquifer recharge: Opportunities and barriers. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/337161
Chicago Manual of Style (16th Edition):
Lidth de Jeude, E J van. “Managed aquifer recharge: Opportunities and barriers.” 2016. Masters Thesis, Universiteit Utrecht. Accessed April 14, 2021.
http://dspace.library.uu.nl:8080/handle/1874/337161.
MLA Handbook (7th Edition):
Lidth de Jeude, E J van. “Managed aquifer recharge: Opportunities and barriers.” 2016. Web. 14 Apr 2021.
Vancouver:
Lidth de Jeude EJv. Managed aquifer recharge: Opportunities and barriers. [Internet] [Masters thesis]. Universiteit Utrecht; 2016. [cited 2021 Apr 14].
Available from: http://dspace.library.uu.nl:8080/handle/1874/337161.
Council of Science Editors:
Lidth de Jeude EJv. Managed aquifer recharge: Opportunities and barriers. [Masters Thesis]. Universiteit Utrecht; 2016. Available from: http://dspace.library.uu.nl:8080/handle/1874/337161

University of the Western Cape
20.
Banda, Vincent Santos Dzulani.
Assessing hydrogeological characteristics to establish influence of aquifer-river interaction in non-perennial river systems, Heuningnes catchment
.
Degree: 2019, University of the Western Cape
URL: http://hdl.handle.net/11394/7007
► Over half of total flows in the global river network are composed of non-perennial rivers. This indicates the importance of non-perennial river systems in supporting…
(more)
▼ Over half of total flows in the global river network are composed of non-perennial rivers. This indicates the importance of non-perennial river systems in supporting the biodiversity. It has been established that groundwater is one of the elements that control the flow regimes and classification (whether perennial or not) of a river system. However, the use of hydrogeological characteristics to establish the influence of groundwater on non-perennial river systems remain to be widely unpublished. This study, therefore, intends to conceptualize and explain the role of hydrogeological characteristics in non-perennial rivers, using the Heuningnes catchment in the Western Cape Province of South Africa as a case study. The study has argued that thorough characterization of aquifers is essential in order to adequately establish the extent of
aquifer-river connectivity and how groundwater influences flows and chemical loading in non-perennial river systems. The study has three objectives namely: (i) to determine the
aquifer characteristics (ii) to characterise the
aquifer-river interaction and (iii) to conceptualize the groundwater flow system.
Records review, field, analytical and laboratory-based methods were used to collect and interpret geological, groundwater level, pumping test, hydro-chemical and environmental stable isotopic data in order to characterise groundwater occurrence, flow system and its interaction with the rivers of the study area. Water samples were taken from groundwater, surface water and rainfall during both dry and wet periods.
Results show that the study area has a topography-controlled water table with shallow depth to groundwater levels ranging on average from 3 - 10 m, which result into largely a local groundwater flow system. Transmissivity values determined from constant rate pumping test range between 0.17 and 1.74 m2/day. Results exhibit that the low transmissivity values are associated with the weathered nature of the Table Mountain sandstone and the unfractured Bokkeveld shale formations.
Hydrochemical data results indicate that both groundwater and river samples in the upstream part of the study area are characterised as fresh water with TDS values of less than 1000 mg/l while the downstream part has saline waters with TDS ranging from 2000 – 35000 mg/l. Results also show that Na-Cl is the dominant water composition for both groundwater and river water. The order of major ion dominance is similar for the two water sources, with concentration ranges from high to low in the order of Na+>Mg2+>Ca2+>K+ and Cl->SO42->HCO3- for cations and anions respectively. The similar patterns and trends in salinity and major ion data suggest the connectivity between the
aquifer and the river. Environmental stable isotope data indicate river samples in upstream areas having depleted δ18O (-4.3 to -5.12‰) and δ2H (-22.9 to -19.3‰) signatures similar to groundwater indicating a stable and continuous groundwater contribution to the river flows. Meanwhile, high evaporative enrichment of δ18O (1.13 to 7.08‰)…
Advisors/Committee Members: Mengistu, Haile (advisor), Kanyerere, Thokozani (advisor).
Subjects/Keywords: Aquifer hydraulic tests;
Aquifer-river interaction;
Conceptual model;
Groundwater;
Hydro-chemistry
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Banda, V. S. D. (2019). Assessing hydrogeological characteristics to establish influence of aquifer-river interaction in non-perennial river systems, Heuningnes catchment
. (Thesis). University of the Western Cape. Retrieved from http://hdl.handle.net/11394/7007
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Banda, Vincent Santos Dzulani. “Assessing hydrogeological characteristics to establish influence of aquifer-river interaction in non-perennial river systems, Heuningnes catchment
.” 2019. Thesis, University of the Western Cape. Accessed April 14, 2021.
http://hdl.handle.net/11394/7007.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Banda, Vincent Santos Dzulani. “Assessing hydrogeological characteristics to establish influence of aquifer-river interaction in non-perennial river systems, Heuningnes catchment
.” 2019. Web. 14 Apr 2021.
Vancouver:
Banda VSD. Assessing hydrogeological characteristics to establish influence of aquifer-river interaction in non-perennial river systems, Heuningnes catchment
. [Internet] [Thesis]. University of the Western Cape; 2019. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/11394/7007.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Banda VSD. Assessing hydrogeological characteristics to establish influence of aquifer-river interaction in non-perennial river systems, Heuningnes catchment
. [Thesis]. University of the Western Cape; 2019. Available from: http://hdl.handle.net/11394/7007
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

California State University – Sacramento
21.
Safi, Samsor Hilmand.
Feasibility study of groundwater banking in Central Sacramento County Basin using a 3-D model.
Degree: MS, Civil Engineering, 2012, California State University – Sacramento
URL: http://hdl.handle.net/10211.9/1450
► This project evaluates the feasibility of groundwater banking in the Central Sacramento County Basin (Central Basin) using a Three Dimensional (3-D) model. The 3-D model…
(more)
▼ This project evaluates the feasibility of groundwater banking in the Central Sacramento County Basin (Central Basin) using a Three Dimensional (3-D) model. The 3-D model was developed using Groundwater Modeling System (GMS) with MODFLOW. The Central Basin is located in Sacramento County in northern California. The Central Basin under study in the current project is bounded by three rivers (on the west by the Sacramento River, on the north by the American River, on the south by the Cosumnes and Mokelumne rivers), and on the east by the Sierra-Nevada mountain range. The surface area of the Central Basin is approximately 388 square miles (248,000 acres), and receives an average annual precipitation of 14 to 20 inches. Sacramento County???s Sacramento Central Groundwater Authority (SCGA) manages the basin, provides guidelines and recommendations for the long-term sustainability of the Central Basin. According to SCGA, the annual average sustainable groundwater extraction rate from the basin could be as high as 273,000 acre-feet per year (AF/year). The current extraction rate stands at 250,000 AF/year. The current and future water demands will increase due the population increase and extended periods of droughts. The increase on water demands will most likely cause the extraction rate from the Central Basin to be reaching the upper extraction limit of 273,000 AF/year. With growing needs for groundwater, sustainable approaches utilizing groundwater system are to be considered as an integral part of a water resources management plan. One approach to groundwater sustainable solution is to artificially-recharge groundwater aquifers. This study focuses on the potential for groundwater recharge in the Central Basin for three water years (wet year, above normal year and critical year). In order to accomplish the objective of this study, a conceptual groundwater model was created. The model assumptions, input parameters and boundary conditions are discussed later in this report.
The simulation analysis of Central Basin model involved developing a conceptual model of the hydrogeology and surface water/groundwater interactions that exist within the project site. A conceptual model is a general description of the site, including the groundwater formations, geologic layers, subsurface hydrogeology, and inflow/outflow to the
aquifer system. The Central Basin model was developed in multiple phases, using various tools available within the GMS computer software. First, the stratigraphy and geology of the Central Basin including the top soils formation were developed. Groundwater and soil properties were assigned to each of the layers created based on theoretical values obtained for literature. Three different water year types were selected: critical (2008), above normal (2005) and wet (2006). Data for precipitation/percolation, rivers/seepage, and the groundwater usage through the extraction wells were applied to the model for each of the selected years. The data included used in this report was obtained from several…
Advisors/Committee Members: Merayyan, Saad.
Subjects/Keywords: Aquifer banking; Computer modeling of groundwater; Aquifer storage
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Safi, S. H. (2012). Feasibility study of groundwater banking in Central Sacramento County Basin using a 3-D model. (Masters Thesis). California State University – Sacramento. Retrieved from http://hdl.handle.net/10211.9/1450
Chicago Manual of Style (16th Edition):
Safi, Samsor Hilmand. “Feasibility study of groundwater banking in Central Sacramento County Basin using a 3-D model.” 2012. Masters Thesis, California State University – Sacramento. Accessed April 14, 2021.
http://hdl.handle.net/10211.9/1450.
MLA Handbook (7th Edition):
Safi, Samsor Hilmand. “Feasibility study of groundwater banking in Central Sacramento County Basin using a 3-D model.” 2012. Web. 14 Apr 2021.
Vancouver:
Safi SH. Feasibility study of groundwater banking in Central Sacramento County Basin using a 3-D model. [Internet] [Masters thesis]. California State University – Sacramento; 2012. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/10211.9/1450.
Council of Science Editors:
Safi SH. Feasibility study of groundwater banking in Central Sacramento County Basin using a 3-D model. [Masters Thesis]. California State University – Sacramento; 2012. Available from: http://hdl.handle.net/10211.9/1450

Virginia Tech
22.
Pradhan, Prarthana.
Evaluation of Soil Aquifer Treatment in a Lab Scale Soil Column Experiment.
Degree: MS, Environmental Engineering, 2018, Virginia Tech
URL: http://hdl.handle.net/10919/98749
► Soil aquifer treatment (SAT) during managed aquifer recharge has been studied as a method of providing additional environmental barriers to pathogens and contaminants in indirect…
(more)
▼ Soil
aquifer treatment (SAT) during managed
aquifer recharge has been studied as a method of providing additional environmental barriers to pathogens and contaminants in indirect potable reuse (IPR) applications. A soil column study was conducted by Hampton Roads Sanitation District in order to evaluate the effectiveness of SAT, as a component of its IPR project involving the replenishment of the Potomac
Aquifer System (PAS), in providing a sustainable source of drinking water. Four packed soil columns were constructed with sand from the PAS and were designed to simulate the travel time of 3 days and 30 days. The tests conducted aimed at evaluating pathogen removal (MS2, E. coli and Cryptosporidium oocysts); evaluating attenuation of regulated (nitrate, nitrite, bromate, trihalomethane (THM), haloacetic acids (HAA), organic carbon) and unregulated contaminants of concern that affect drinking water quality. Effective pathogen removal was observed with 6 to 7-log removals of MS2 and E. coli and 3 to 5-log removals of microbeads, used as a surrogate for Cryptosporidium. Removal across 3 day columns was comparable to 30-day columns but the potential to achieve higher removal with longer retention time was acknowledged. Nitrate, bromate, THMs and HAAs were completely reduced in 30-day columns. Total organic carbon was removed at 25 �" 35% in all four columns. Seven out of the 106 contaminants of emerging concern (CEC) tested were consistently detected in the column feed and effluent at concentrations greater than 100 ng/L; some compounds showed potential for removal while no conclusive results were drawn for the remaining compounds.
Advisors/Committee Members: Bott, Charles B. (committeechair), Widdowson, Mark A. (committeechair), Dietrich, Andrea M. (committee member).
Subjects/Keywords: soil aquifer treatment; soil columns; indirect potable reuse; managed aquifer recharge
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APA (6th Edition):
Pradhan, P. (2018). Evaluation of Soil Aquifer Treatment in a Lab Scale Soil Column Experiment. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/98749
Chicago Manual of Style (16th Edition):
Pradhan, Prarthana. “Evaluation of Soil Aquifer Treatment in a Lab Scale Soil Column Experiment.” 2018. Masters Thesis, Virginia Tech. Accessed April 14, 2021.
http://hdl.handle.net/10919/98749.
MLA Handbook (7th Edition):
Pradhan, Prarthana. “Evaluation of Soil Aquifer Treatment in a Lab Scale Soil Column Experiment.” 2018. Web. 14 Apr 2021.
Vancouver:
Pradhan P. Evaluation of Soil Aquifer Treatment in a Lab Scale Soil Column Experiment. [Internet] [Masters thesis]. Virginia Tech; 2018. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/10919/98749.
Council of Science Editors:
Pradhan P. Evaluation of Soil Aquifer Treatment in a Lab Scale Soil Column Experiment. [Masters Thesis]. Virginia Tech; 2018. Available from: http://hdl.handle.net/10919/98749

Georgia Tech
23.
Lu, Chunhui.
Mixing in complex coastal hydrogeologic systems.
Degree: PhD, Civil and Environmental Engineering, 2011, Georgia Tech
URL: http://hdl.handle.net/1853/39600
► The mixing zone developed at freshwater-seawater interface is one of the most important features in complex coastal hydrogeologic systems, which controls subsurface flow and reactive…
(more)
▼ The mixing zone developed at freshwater-seawater interface is one of the most important features in complex coastal hydrogeologic systems, which controls subsurface flow and reactive transport dynamics. Freshwater-seawater mixing-zone development is influenced by many physical and chemical processes, such as characteristics of geologic formation, hydrodynamic fluctuations of groundwater and seawater levels, fluid-rock interactions, and others. Wide mixing zones have been found in many coastal aquifers all over the world. However, the mechanisms responsible for wide mixing zones are not well understood. In this thesis, two hypotheses were proposed to explain wide mixing zones in coastal aquifers: (1) kinetic mass transfer coupled with transient conditions, which create the movement of the mixing zone, may widen mixing zones; and (2)
aquifer stratification may widen the mixing zone.
The hypotheses were tested by both multiscale numerical simulations and laboratory experiments. Numerical simulations were based on a variable-density groundwater model by varying mass transfer parameters, including immobile porosity, mobile porosity, and mass transfer coefficient, and the hydraulic conductivity contrast between
aquifer layers. Laboratory experiments were conducted in a quasi-two-dimensional tank, where real beach sands were installed and foodstuff dyes were used to visualize the development of freshwater-seawater mixing zone. Major conclusions included (1) the mixing zone can be significantly widened when the mass transfer timescale and the period of transient boundary is comparable due to the nonequilibrium mass transfer effects; and (2) a thick mixing zone occurs in low-permeability layer when it overlays upon a fast flow layer. These results not only improve the understanding of the dynamics of mixing-zone development and its associated geochemical processes in coastal aquifers, but also identify hydrogeologic conditions for the model of sharp-interface approximation to be valid.
In addition to better understanding the mechanisms and dynamics of mixing zone, this thesis also investigates cost-effective management of coastal groundwater resources. To protect and conserve limited water recourses in coastal regions, interest in
aquifer storage and recovery (ASR) has been growing in recent years. ASR is a promising strategy for water resources management and has been widely used in many contaminated and saline aquifers. However, its performance may be significantly constrained by mass transfer effects due to the mobilization of solutes initially residing in immobile domains. Better understanding of kinetic mass transfer effects on ASR is needed in order to aid the decision-making process. A numerical model is developed to simulate ASR performance by combining the convergent and divergent dispersion models with a first-order mass transfer model. By analyzing the concentration history at the pumping well, we obtain simple and effective relationships for investigating ASR efficiency under various mass transfer…
Advisors/Committee Members: Luo, Jian (Committee Chair), Georgakakos, Aris (Committee Member), Kitanidis, Peter (Committee Member), Roberts, Philip (Committee Member), Yang, Jiawen (Committee Member).
Subjects/Keywords: Aquifer storage and recovery; Stratified aquifer; Seawater intrusion; Coastal aquifer; Mixing-zone development; Mixing; Hydrogeology; Coasts; Groundwater; Saltwater encroachment
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lu, C. (2011). Mixing in complex coastal hydrogeologic systems. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/39600
Chicago Manual of Style (16th Edition):
Lu, Chunhui. “Mixing in complex coastal hydrogeologic systems.” 2011. Doctoral Dissertation, Georgia Tech. Accessed April 14, 2021.
http://hdl.handle.net/1853/39600.
MLA Handbook (7th Edition):
Lu, Chunhui. “Mixing in complex coastal hydrogeologic systems.” 2011. Web. 14 Apr 2021.
Vancouver:
Lu C. Mixing in complex coastal hydrogeologic systems. [Internet] [Doctoral dissertation]. Georgia Tech; 2011. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1853/39600.
Council of Science Editors:
Lu C. Mixing in complex coastal hydrogeologic systems. [Doctoral Dissertation]. Georgia Tech; 2011. Available from: http://hdl.handle.net/1853/39600

Universiteit Utrecht
24.
Rosado de Palacio, C.
Water system analysis and numerical modelling of a coastal aquifer in western Mexico: a case study.
Degree: 2014, Universiteit Utrecht
URL: http://dspace.library.uu.nl:8080/handle/1874/296739
► This study combines a water system analysis of a coastal aquifer in western Mexico that is subject to seawater intrusion, where a hydrogeological characterisation of…
(more)
▼ This study combines a water system analysis of a coastal
aquifer in western Mexico that is
subject to seawater intrusion, where a hydrogeological characterisation of the area is given, with numerical modelling of the controlling processes and parameters as an instrument to provide a better understanding of the water system. The MOCDENS3D code is used in this study to model density dependent groundwater flow. The hydrodynamic behaviour of the coastal
aquifer is similar to an island
aquifer, where the freshwater lens “floats” on top of higher salinity water bodies, in this case saline from the sea and hypersaline from the lagoon. The freshwater lens varies in thickness according to the wet and dry seasons. This causes the freshwater lens to be in a delicate equilibrium between recharge and discharge of freshwater. High evaporation rates result in brine concentrations in the lagoon which enter the system in the form of saline fingers that are density driven. The numerical results provide a relatively close approximation to the density distribution that underlies the sand bar where field measurements were carried out. The results are highly sensitive to changes in the precipitation and evapotranspiration rates, with small changes leading to different concentration configurations, particularly in the freshwater lens. Results also demonstrate that a numerical model of this scale can be useful as a conceptual tool to understand the controlling factors that determine groundwater flow. The scenarios of climate change indicate that hydraulic heads will increase due to sea level rise and decrease due to longer periods of drought, and that the volume of fresh groundwater in the freshwater lens is sensitive to both of these scenarios. However, further research is necessary to provide more spatially extensive data that can be used to answer several of the uncertainties evidenced by this model.
Advisors/Committee Members: Schotting, R. J., Oude Essink, G.H.P..
Subjects/Keywords: Seawater intrusion; coastal aquifer; modelling; MOCDENS3D; hypersaline
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Rosado de Palacio, C. (2014). Water system analysis and numerical modelling of a coastal aquifer in western Mexico: a case study. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/296739
Chicago Manual of Style (16th Edition):
Rosado de Palacio, C. “Water system analysis and numerical modelling of a coastal aquifer in western Mexico: a case study.” 2014. Masters Thesis, Universiteit Utrecht. Accessed April 14, 2021.
http://dspace.library.uu.nl:8080/handle/1874/296739.
MLA Handbook (7th Edition):
Rosado de Palacio, C. “Water system analysis and numerical modelling of a coastal aquifer in western Mexico: a case study.” 2014. Web. 14 Apr 2021.
Vancouver:
Rosado de Palacio C. Water system analysis and numerical modelling of a coastal aquifer in western Mexico: a case study. [Internet] [Masters thesis]. Universiteit Utrecht; 2014. [cited 2021 Apr 14].
Available from: http://dspace.library.uu.nl:8080/handle/1874/296739.
Council of Science Editors:
Rosado de Palacio C. Water system analysis and numerical modelling of a coastal aquifer in western Mexico: a case study. [Masters Thesis]. Universiteit Utrecht; 2014. Available from: http://dspace.library.uu.nl:8080/handle/1874/296739
25.
Vinayachandran, N.
Hydrogeology and hydrochemistry of the aquifer systems of Kuttanad area, Kerala: Their role in understanding the evolution of groundwaters.
Degree: 2014, Cochin University of Science and Technology
URL: http://dyuthi.cusat.ac.in/purl/4954
► This is an attempt to understand the important factors that control the occurrence, development and hydrochemical evolution of groundwater resources in sedimentary multi aquifer systems.…
(more)
▼ This is an attempt to understand the important factors that control the occurrence, development and hydrochemical evolution of groundwater resources in sedimentary multi aquifer systems. The primary objective of this work is an integrated study of the hydrogeology and hydrochemistry with a view to elucidate the hydrochemical evolution
of groundwater resources in the aquifer systems. The study is taken up in a typical coastal sedimentary aquifer system evolved under fluvio-marine environment in the coastal area of Kerala, known as the Kuttanad.
The present study has been carried out to understand the aquifer systems, their inter relationships and evolution in the Kuttanad area of Kerala. The multi aquifer systems in
the Kuttanad basin were formed from the sediments deposited under fluvio-marine and
fluvial depositional environments and the marine transgressions and regressions in the
geological past and palaeo climatic conditions influenced the hydrochemical environment in these aquifers. The evolution of groundwater and the hydrochemical processes involved in the formation of the present day water quality are elucidated from
hydrochemical studies and the information derived from the aquifer geometry and hydraulic properties.
Kuttanad area comprises of three types of aquifer systems namely phreatic aquifer underlain by Recent confined aquifer followed by Tertiary confined aquifers. These systems were formed by the deposition of sediments under fluvio-marine and fluvial environment.
The study of the hydrochemical and hydraulic properties of the three aquifer systems proved that these three systems are separate entities. The phreatic aquifers in the area
have low hydraulic gradients and high rejected recharge.
The Recent confined aquifer has very poor hydraulic characteristics and recharge to this
aquifer is very low. The Tertiary aquifer system is the most potential fresh water aquifer
system in the area and the groundwater flow in the aquifer is converging towards the central part of the study area (Alleppey town) due to large scale pumping of water for water supply from this aquifer system. Mixing of waters and anthropogenic interferences are the dominant processes modifying the hydrochemistry in phreatic aquifers. Whereas, leaching of salts and cation exchange are the dominant processes modifying the hydrochemistry of groundwater in the confined aquifer system of Recent alluvium. Two significant chemical reactions modifying the hydrochemistry in the Recent aquifers are oxidation of iron in ferruginous clays which contributes hydrogen ions and the decomposition of organic matter in the aquifer system which consumes hydrogen ions. The hydrochemical environment is entirely different in the Tertiary aquifers as the groundwater in this aquifer system are palaeo waters evolved during various marine transgressions and regressions and these waters are being modified by processes of leaching of salts, cation exchange and chemical reactions under strong reducing environment. It is proved that the salinity observed in the…
Subjects/Keywords: Geology; geomorphology; Hydrochemistry; Aquifer systems; Kuttanad
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Vinayachandran, N. (2014). Hydrogeology and hydrochemistry of the aquifer systems of Kuttanad area, Kerala: Their role in understanding the evolution of groundwaters. (Thesis). Cochin University of Science and Technology. Retrieved from http://dyuthi.cusat.ac.in/purl/4954
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Vinayachandran, N. “Hydrogeology and hydrochemistry of the aquifer systems of Kuttanad area, Kerala: Their role in understanding the evolution of groundwaters.” 2014. Thesis, Cochin University of Science and Technology. Accessed April 14, 2021.
http://dyuthi.cusat.ac.in/purl/4954.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Vinayachandran, N. “Hydrogeology and hydrochemistry of the aquifer systems of Kuttanad area, Kerala: Their role in understanding the evolution of groundwaters.” 2014. Web. 14 Apr 2021.
Vancouver:
Vinayachandran N. Hydrogeology and hydrochemistry of the aquifer systems of Kuttanad area, Kerala: Their role in understanding the evolution of groundwaters. [Internet] [Thesis]. Cochin University of Science and Technology; 2014. [cited 2021 Apr 14].
Available from: http://dyuthi.cusat.ac.in/purl/4954.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Vinayachandran N. Hydrogeology and hydrochemistry of the aquifer systems of Kuttanad area, Kerala: Their role in understanding the evolution of groundwaters. [Thesis]. Cochin University of Science and Technology; 2014. Available from: http://dyuthi.cusat.ac.in/purl/4954
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Ghana
26.
Akuetteh, A.N.
Hydrogeological Characteristics of Aquifers in the Greater Accra Region
.
Degree: 2019, University of Ghana
URL: http://ugspace.ug.edu.gh/handle/123456789/35533
► The economic importance of groundwater in the Greater Accra Region cannot be overemphasized, since supply from boreholes and wells continues to be the most dependable…
(more)
▼ The economic importance of groundwater in the Greater Accra Region cannot be overemphasized, since supply from boreholes and wells continues to be the most dependable alternative sources of water for most rural and urban communities in the region. Three different consolidated hard rocks underlie the region making it difficult to produce volumes of groundwater for supplies. Demand for portable water has led to the drilling of large numbers of boreholes. This study statistically assesses the general conditions of groundwater resources for successful exploitation, classify areas for prolific groundwater exploration and assess the quality of water in the region to be used for domestic purposes. Statistical approach was adopted to compare the variability and distribution of specific capacity and transmissivity values of existing boreholes in the various hydrogeological units. Hydrogeological units were classified using Krasny’s transmissivity classification in order to delineate prospective zones for groundwater exploration. The results from the Krasny’s transmissivity classification showed Transmissivity coefficient of 197m2/day, 197.3m2/day and 211.3m2/day for Dahomeyan, Granitoids and Togo hydrogeological units respectively. All the hydrogeological units belonged to the class of transmissivity magnitude class II which depict high transmissivity coefficient that suggests abstraction potential suitable for regional supply. The transmissivity indices are 6.04, 6.23 and 6.24 for Birimian Granitoids, Dahomeyan formation and Togo formation respectively. These categorised all the three hydrogeological units into moderate variation in a heterogeneous environment but the Togo formation being the most prolific. Based on WQI most of samples are suitable for domestic purpose except for few locations, which show values beyond the permissible limits that cannot be used without treatment.
R and Q-mode hierarchical cluster analysis (HCA) are combined with factor analysis with principal components and varimax rotation, to determine field associations among the sample points, and their most possible sources of origin. R-mode and Q-mode HCA results showed linkages in general fields that suggest the varying geochemical sources in the three hydrogeological units. Physico-chemical parameters of the groundwater showed low pH values ranges suggesting acidic water in all the hydrogeological units. Nitrate values ranged between 0.0 and 2.73 mg/l which are within WHO standard guideline but very high in few samples suggesting pollution introduced by anthropogenic activities. Correlation analysis between the major ions and physical parameters showed positive correlation between TDS and Na, Mg, Ca that were significant at levels of significance above 0.5 for all the three hydrogeological units suggesting mineralisation through rock weathering processes. Piper Trilinear diagrams showed Na-Cl, Ca- Mg-Cl, and Ca–Mg–HCO3- are the dominant water type in the study area. Multivariate statistical methods employed to determine the factors that influenced…
Subjects/Keywords: Aquifer;
Groundwater;
Greater Accra Region;
Hydrogeological
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Akuetteh, A. N. (2019). Hydrogeological Characteristics of Aquifers in the Greater Accra Region
. (Masters Thesis). University of Ghana. Retrieved from http://ugspace.ug.edu.gh/handle/123456789/35533
Chicago Manual of Style (16th Edition):
Akuetteh, A N. “Hydrogeological Characteristics of Aquifers in the Greater Accra Region
.” 2019. Masters Thesis, University of Ghana. Accessed April 14, 2021.
http://ugspace.ug.edu.gh/handle/123456789/35533.
MLA Handbook (7th Edition):
Akuetteh, A N. “Hydrogeological Characteristics of Aquifers in the Greater Accra Region
.” 2019. Web. 14 Apr 2021.
Vancouver:
Akuetteh AN. Hydrogeological Characteristics of Aquifers in the Greater Accra Region
. [Internet] [Masters thesis]. University of Ghana; 2019. [cited 2021 Apr 14].
Available from: http://ugspace.ug.edu.gh/handle/123456789/35533.
Council of Science Editors:
Akuetteh AN. Hydrogeological Characteristics of Aquifers in the Greater Accra Region
. [Masters Thesis]. University of Ghana; 2019. Available from: http://ugspace.ug.edu.gh/handle/123456789/35533

University of Georgia
27.
Seerley, Dana.
An analysis of the evolution of public policy for aquifer storage and recovery : experiences in three Southeastern states.
Degree: 2014, University of Georgia
URL: http://hdl.handle.net/10724/20910
► One of the most important public policy issues of our time, both in the U.S. and abroad, is the management of water resources. A technique…
(more)
▼ One of the most important public policy issues of our time, both in the U.S. and abroad, is the management of water resources. A technique devised in recent years to help manage these resources is aquifer storage and recovery (ASR), which
allows storage of water in underground aquifers instead of above-ground reservoirs or storage tanks. ASR is growing in use worldwide, more rapidly in some areas than in others. The storage technique is complex in that it entails thorough and
site-specific analysis of hydrologic, geologic, and geochemical conditions. Because of its complexity and unfamiliarity to the general public, decisions regarding ASR use and regulation could easily be limited to a small group of experts rather than
opened to public opinion. It thus provides an excellent opportunity for examining the policy-making process for such scientific and technological issues in general. The fundamental question posed in this study is this: in addition to science, what
elements—social, political, economic, or other—have influenced the decision-making process regarding the acceptance and implementation of aquifer storage and recovery? The hypothesis is that ASR generally remains the domain of scientists and engineering
professionals unless a specific event, or sequence of events, propels it into the public policy arena. At that time, many other factors begin to shape the way decisions are made regarding ASR implementation and/or regulation. Science generally remains an
important aspect of the decision-making process, but becomes only one element among many other considerations. A series of case studies in Georgia, Florida, and South Carolina was used to examine how decisions have been made regarding aquifer storage and
recovery. Florida and South Carolina have both implemented ASR, while Georgia has, at least temporarily, elected not to test the technique. It is expected that many aspects of the case study results can be generalized to other locations and
circumstances, relative to ASR as well as other scientific policy issues.
Subjects/Keywords: aquifer; ASR; groundwater; policy-making; risk
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Seerley, D. (2014). An analysis of the evolution of public policy for aquifer storage and recovery : experiences in three Southeastern states. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/20910
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Seerley, Dana. “An analysis of the evolution of public policy for aquifer storage and recovery : experiences in three Southeastern states.” 2014. Thesis, University of Georgia. Accessed April 14, 2021.
http://hdl.handle.net/10724/20910.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Seerley, Dana. “An analysis of the evolution of public policy for aquifer storage and recovery : experiences in three Southeastern states.” 2014. Web. 14 Apr 2021.
Vancouver:
Seerley D. An analysis of the evolution of public policy for aquifer storage and recovery : experiences in three Southeastern states. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/10724/20910.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Seerley D. An analysis of the evolution of public policy for aquifer storage and recovery : experiences in three Southeastern states. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/20910
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
28.
Moore, Lacey.
Cost of consumption: an analysis of the heterogeneous impacts of groundwater availability in the High Plains aquifer, The.
Degree: MS(M.S.), Agricultural and Resource Economics, 2019, Colorado State University
URL: http://hdl.handle.net/10217/195300
► Nearly 20-percent of the wheat, corn, cotton and cattle produced in the United States are made possible by the hydrologic resources of the High Plains…
(more)
▼ Nearly 20-percent of the wheat, corn, cotton and cattle produced in the United States are made possible by the hydrologic resources of the High Plains
Aquifer (HPA) (NRCS, 2017). Despite being a source of agricultural prosperity, this
aquifer has long been
subject to overdraft including reductions in saturated thickness exceeding 50m in the southern extents (Haacker et al., 2016). We follow Hornbeck et al. (2014, 2015) in comparing economic outcomes among counties inside the HPA to similar counties within 100km from the
aquifer boundary, building on this research by also evaluating the impact of initial groundwater endowments as an exogenous measure of irrigation access. Utilizing a hedonic pricing model based on Ricardian theory of land valuation, we choose to examine irrigation intensity, land values, and population density using census data at the county scale to measure the marginal benefit of groundwater. These economic outcomes are examined across ranked groupings of initial saturated thickness for three distinct time periods: approximate pre-development of the
aquifer (1925-1945), during the height of irrigation expansion (1950-1992), and during contemporary time periods of irrigation water shortages (1997-2012). Results indicate that previous studies which have regarded the HPA as a homogeneous unit overlook the true marginal contributions of groundwater. We find that the counties with the largest initial endowments of groundwater in the HPA have increased land values by as much as 42-percent during the height of irrigation expansion, and more importantly have maintained the longest lasting economic benefits compared to counties with lower initial saturated thickness and those outside the
aquifer. Our results differ from previous studies (i.e., Feng et al., 2012) as we find no statistical relationship between access to groundwater (or
aquifer depletion) and population density.
Advisors/Committee Members: Suter, Jordan (advisor), Goemans, Chris (committee member), Schipanski, Meagan (committee member).
Subjects/Keywords: economics; hedonic; Ricardian; groundwater; aquifer; Ogallala
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Moore, L. (2019). Cost of consumption: an analysis of the heterogeneous impacts of groundwater availability in the High Plains aquifer, The. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/195300
Chicago Manual of Style (16th Edition):
Moore, Lacey. “Cost of consumption: an analysis of the heterogeneous impacts of groundwater availability in the High Plains aquifer, The.” 2019. Masters Thesis, Colorado State University. Accessed April 14, 2021.
http://hdl.handle.net/10217/195300.
MLA Handbook (7th Edition):
Moore, Lacey. “Cost of consumption: an analysis of the heterogeneous impacts of groundwater availability in the High Plains aquifer, The.” 2019. Web. 14 Apr 2021.
Vancouver:
Moore L. Cost of consumption: an analysis of the heterogeneous impacts of groundwater availability in the High Plains aquifer, The. [Internet] [Masters thesis]. Colorado State University; 2019. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/10217/195300.
Council of Science Editors:
Moore L. Cost of consumption: an analysis of the heterogeneous impacts of groundwater availability in the High Plains aquifer, The. [Masters Thesis]. Colorado State University; 2019. Available from: http://hdl.handle.net/10217/195300

Anna University
29.
Sathish, S.
Geophysical geochemical studies and groundwater modelling
in south Chennai coastal aquifer; -.
Degree: Geology, 2012, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/25537
► Groundwater in coastal aquifers is susceptible to contamination by newlineseawater intrusion Chennai is the fourth largest metropolitan city and one of newlinethe highest populated cities…
(more)
▼ Groundwater in coastal aquifers is susceptible to
contamination by newlineseawater intrusion Chennai is the fourth
largest metropolitan city and one of newlinethe highest populated
cities in India The city utilizes groundwater sources
newlineespecially from coastal aquifers in the north and south of
the city The usage newlineof groundwater has increased to meet the
domestic agriculture and industrial newlineneeds The overpumping of
groundwater leads to seawater intrusion and newlineresults in
deterioration of groundwater quality Hence research was carried
newlineout in the south Chennai coastal aquifer to delineate the
zone of extension of newlineseawater influence to arrive at
groundwater quality zonation to understand newlinethe status of
aquifer with present level of pumping and to predict the behavior
newlineof the aquifer with respect to the groundwater level under
different hydrologic newlinestresses newlineThe study area 35 km
located at the south of Chennai city is newlinebounded by
contaminated water on all the sides The annual average rainfall
newlinebased on the rainfall data collected over the past 10 years
is 1066 mm newlineGeologically the study area has two distinct
formations crystalline newlineCharnockite rocks of Archean age and
Quaternaryrecent sediments The newlinecrystalline charnockite rock
is overlined by Quaternary recent sediments The
newlineQuaternaryrecent sediments weathered and fractured
crystalline charnockite newlinefunction as an unconfined aquifer
system The groundwater head follows the newlinetopography and flows
towards the east and west from the central part of the newlinearea
newlineInitially the secondary data like longterm rainfall data
newlinegroundwater level data of wells and borehole logs was
collected The primary newlinedata collection was begun with the
geoelectrical survey May 2008 May newline2009 and groundwater
monitoring of wells Groundwater monitoring was newlinecarried out
once in three months from August 2008 to May 2010
newlineGroundwater level electrical conductivity EC hydrogen ion
activity pH newlinesalinity and temperature were measured insitu
Major ions such as Ca Mg newlineNa K HCO CO SO Cl and minor ions
like Br F NO and NO were newlineanalysed in the
laborato
-
Advisors/Committee Members: Elango, R.
Subjects/Keywords: Coastal Aquifer; Geochemical; Geophysical; Groundwater; insitu; Modelling
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APA (6th Edition):
Sathish, S. (2012). Geophysical geochemical studies and groundwater modelling
in south Chennai coastal aquifer; -. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/25537
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sathish, S. “Geophysical geochemical studies and groundwater modelling
in south Chennai coastal aquifer; -.” 2012. Thesis, Anna University. Accessed April 14, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/25537.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sathish, S. “Geophysical geochemical studies and groundwater modelling
in south Chennai coastal aquifer; -.” 2012. Web. 14 Apr 2021.
Vancouver:
Sathish S. Geophysical geochemical studies and groundwater modelling
in south Chennai coastal aquifer; -. [Internet] [Thesis]. Anna University; 2012. [cited 2021 Apr 14].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/25537.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sathish S. Geophysical geochemical studies and groundwater modelling
in south Chennai coastal aquifer; -. [Thesis]. Anna University; 2012. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/25537
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University
30.
Cirdi, Ayse Pamir.
MATHEMATICAL MODELING OF GEOMECHANICAL BEHAVIOR TARMAT DURING THE DEPLETION OF GIANT OIL RESERVOIR-AQUIFER SYSTEMS
.
Degree: 2008, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/8822
► Tarmat deformation and failure behavior during depletion of a giant reservoir-aquifer system is studied and a mathematical model is developed for this kind of composite…
(more)
▼ Tarmat deformation and failure behavior during depletion of a giant reservoir-
aquifer system is studied and a mathematical model is developed for this kind of composite systems. Deformation response of tarmat to increasing pressure differential caused by continuous depletion of reservoir is studied. In this context, geomechanical failure that takes place at the instant that the pressure differential reaches a critical value is evaluated. Fracture that occurs after this geomechanical failure is characterized. Fracture permeability that is established due to the characterized fracture is studied. Plate theory, maximum shear stress failure criterion, conventional well test model, Perkins-Kern-Nordgren model (PKN model), Khristianovic-Geertsma-de Klerk model (KGD model), flow through fractures models have been combined in a way such that tarmat behavior in giant reservoir-
aquifer systems would be modeled appropriately. This sensitivity analysis, being conducted with parameters of reservoir, rock and fluid properties, proposes a protocol to find relationships and suggests designs in composite systems. The proposed methodology, ultimately, predicts fracture width and fracture permeability that would be developed in a system with a tarmat layer having a certain thickness and a reservoir being produced at a certain production rate and total depletion time.
Advisors/Committee Members: Turgay Ertekin, Thesis Advisor/Co-Advisor, Luis Ayala, Thesis Advisor/Co-Advisor.
Subjects/Keywords: aquifer; reservoir; tarmat
Record Details
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Share »
Record Details
Similar Records
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cirdi, A. P. (2008). MATHEMATICAL MODELING OF GEOMECHANICAL BEHAVIOR TARMAT DURING THE DEPLETION OF GIANT OIL RESERVOIR-AQUIFER SYSTEMS
. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/8822
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Cirdi, Ayse Pamir. “MATHEMATICAL MODELING OF GEOMECHANICAL BEHAVIOR TARMAT DURING THE DEPLETION OF GIANT OIL RESERVOIR-AQUIFER SYSTEMS
.” 2008. Thesis, Penn State University. Accessed April 14, 2021.
https://submit-etda.libraries.psu.edu/catalog/8822.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Cirdi, Ayse Pamir. “MATHEMATICAL MODELING OF GEOMECHANICAL BEHAVIOR TARMAT DURING THE DEPLETION OF GIANT OIL RESERVOIR-AQUIFER SYSTEMS
.” 2008. Web. 14 Apr 2021.
Vancouver:
Cirdi AP. MATHEMATICAL MODELING OF GEOMECHANICAL BEHAVIOR TARMAT DURING THE DEPLETION OF GIANT OIL RESERVOIR-AQUIFER SYSTEMS
. [Internet] [Thesis]. Penn State University; 2008. [cited 2021 Apr 14].
Available from: https://submit-etda.libraries.psu.edu/catalog/8822.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Cirdi AP. MATHEMATICAL MODELING OF GEOMECHANICAL BEHAVIOR TARMAT DURING THE DEPLETION OF GIANT OIL RESERVOIR-AQUIFER SYSTEMS
. [Thesis]. Penn State University; 2008. Available from: https://submit-etda.libraries.psu.edu/catalog/8822
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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