subject:(Hydrogeology)

Oregon State University

1. Caruso, Philip. Hydrogeology and Hydrologic Connectivity of a Semiarid Central Oregon Rangeland System.

Degree: MS, 2017, Oregon State University

URL: http://hdl.handle.net/1957/61893

► The hydrologic function of a landscape is an important concept for understanding the presence, movement and availability of water. The Camp Creek Paired Watershed Study… (more)

▼ The hydrologic function of a landscape is an important concept for understanding the presence, movement and availability of water. The Camp Creek Paired Watershed Study (CCPWS) site in Central Oregon has been utilized to investigate the impacts of western juniper on watershed hydrologic function since 1993. The research presented here builds upon the work done at the CCPWS to further investigate the hydrologic connections and gain a better understanding of the underlying hydrogeologic system in and surrounding the CCPWS site. This thesis is organized into two chapters. Each chapter is an individual manuscript detailing a portion of the overall study. The overarching goal of both chapters was to increase the base of understanding of surface water and groundwater interactions, subsurface hydrologic connections and the understanding of the role of local hydrogeology in a semiarid system in central Oregon. Both chapters are being prepared for journal submission. Hydrologic connectivity is the flow of surface water and subsurface water throughout a landscape [1] and is important for a wide variety of ecosystem services. Most investigations of hydrologic connectivity have focused on forested environments and more humid settings. This study investigated subsurface hydrologic connectivity in a semiarid rangeland system. Chapter one discusses the movement of both surface and subsurface water within the CCPWS and characterizes the temporary hydrologic connections present and looks at the impact of vegetation canopy cover on those connections. The objectives of this study were to 1) assess surface water and groundwater interactions in one watershed with juniper and one with juniper removed; and, 2) characterize the hydrologic connectivity of upland watersheds and the riparian valley below them. The hydrogeologic framework of an area describes the structure and properties of a groundwater system. This framework helps us to understand the way water moves through the subsurface and its availability for human and ecosystem needs. A wide-ranging study of groundwater system of the Upper Deschutes Basin was completed in 2002 [2]. However, the southeastern portion of the basin was left out of the larger basin wide study and many of the finer details of the system were not captured at this coarse scale. A better understanding of the hydrogeology in the area surrounding the CCPWS helps to place the more than 20 years of hydrologic research at this site into a proper context for further research and application. Chapter two describes the local hydrogeology of a region of interest in the southeast portion of the Upper Deschutes Basin. A combination of field data collection and synthesis of existing hydrogeologic data were used for this study. Study objectives were to 1) characterize the hydrogeologic framework of an area of interest surrounding the CCPWS; and, 2) evaluate mechanisms of shallow aquifer recharge and discharge at the CCPWS. Advisors/Committee Members: Ochoa, Carlos (advisor), Jarvis, Todd (committee member).

Subjects/Keywords: hydrogeology

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APA (6^th Edition):

Caruso, P. (2017). Hydrogeology and Hydrologic Connectivity of a Semiarid Central Oregon Rangeland System. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/61893

Chicago Manual of Style (16^th Edition):

Caruso, Philip. “Hydrogeology and Hydrologic Connectivity of a Semiarid Central Oregon Rangeland System.” 2017. Masters Thesis, Oregon State University. Accessed February 18, 2020. http://hdl.handle.net/1957/61893.

MLA Handbook (7^th Edition):

Caruso, Philip. “Hydrogeology and Hydrologic Connectivity of a Semiarid Central Oregon Rangeland System.” 2017. Web. 18 Feb 2020.

Vancouver:

Caruso P. Hydrogeology and Hydrologic Connectivity of a Semiarid Central Oregon Rangeland System. [Internet] [Masters thesis]. Oregon State University; 2017. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/1957/61893.

Council of Science Editors:

Caruso P. Hydrogeology and Hydrologic Connectivity of a Semiarid Central Oregon Rangeland System. [Masters Thesis]. Oregon State University; 2017. Available from: http://hdl.handle.net/1957/61893

Addis Ababa University

2. HABTAMU, GIZACHEW DEMISSIE. GROUNDWATER POTENTIAL INVESTIGATION OF UPPER WABE RIVER CATCHMENT, SOUTH EASTERN CENTRAL ETHIOPIA .

Degree: 2012, Addis Ababa University

URL: http://etd.aau.edu.et/dspace/handle/123456789/745

► The highlands falling within the project area represent part of the southeastern central Ethiopian plateau including Arsi, Bale and parts of southwestern margin of the… (more)

▼ The highlands falling within the project area represent part of the southeastern central Ethiopian plateau including Arsi, Bale and parts of southwestern margin of the project area also extend to adjoining areas of Sidama Zone in South Nations, Nationalities and Peoples Regional State. The Wabe river originates just east of Wetera Resa Village in South Nations, Nationalities and Peoples Regional State. All the study area is covered by Tertiary and Quaternary volcanics. Tertiary volcanics of the pre-rift and post-pift cover large part of the area. The Pre-Rift succession represented by Alaji basalt, alkali trachyte flows, and alkali trachyte and basalt flows and the Post-Rift volcanic succession including alkaline to peralkaline basalts and trachytes. The Quaternary Volcanics represented by Ginir Volcanics and basalt, often scoriaceous, with minor cinder cones and vitric tuffs. These volcanic rocks are topped by Plio-Pleistocene fluvio-lacustrine sedimentary sequence. Most central part of the area covered by Post-Rrift succession of the Nazarath group volcanic rocks. Groundwater recharge is estimated by applying three methods; base flow separation, water balance and soil moisture balance methods. Drainage-area ratio extrapolating method between the drainage area of the gauged sub-catchment and ungauged sub catchment is employed to estimate the discharge of the river at the delineated mouth of the river. Recharge estimated by flow separation method is more than seven fold greater than recharge estimated by soil moisture and water balance methods. The composition of the majority of the highland volcanic plateau is silicate minerals of mostly plagioclase feldspars of the albite and anorthite group and pyroxene composition. These minerals are rich in Ca, Mg and Na. Hydrolysis, decomposition and/or leaching of these silicate minerals enriches the water in the highlands by Ca, Mg, and Na cations. In the study area most water types obtained from laboratory analyses have low TDS and based on cation composition Ca-Na-HCO3 is the dominant water type followed by Na-Ca-HCO3 evolving down the flow path to dominantly Na-Ca-HCO3 water. Concerning water quality criteria for drinking and irrigation purposes the water from the area fits the standard quality. Advisors/Committee Members: Dr. Seifu Kebede (advisor).

Subjects/Keywords: Hydrogeology

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APA (6^th Edition):

HABTAMU, G. D. (2012). GROUNDWATER POTENTIAL INVESTIGATION OF UPPER WABE RIVER CATCHMENT, SOUTH EASTERN CENTRAL ETHIOPIA . (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/745

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

HABTAMU, GIZACHEW DEMISSIE. “GROUNDWATER POTENTIAL INVESTIGATION OF UPPER WABE RIVER CATCHMENT, SOUTH EASTERN CENTRAL ETHIOPIA .” 2012. Thesis, Addis Ababa University. Accessed February 18, 2020. http://etd.aau.edu.et/dspace/handle/123456789/745.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

HABTAMU, GIZACHEW DEMISSIE. “GROUNDWATER POTENTIAL INVESTIGATION OF UPPER WABE RIVER CATCHMENT, SOUTH EASTERN CENTRAL ETHIOPIA .” 2012. Web. 18 Feb 2020.

Vancouver:

HABTAMU GD. GROUNDWATER POTENTIAL INVESTIGATION OF UPPER WABE RIVER CATCHMENT, SOUTH EASTERN CENTRAL ETHIOPIA . [Internet] [Thesis]. Addis Ababa University; 2012. [cited 2020 Feb 18]. Available from: http://etd.aau.edu.et/dspace/handle/123456789/745.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

HABTAMU GD. GROUNDWATER POTENTIAL INVESTIGATION OF UPPER WABE RIVER CATCHMENT, SOUTH EASTERN CENTRAL ETHIOPIA . [Thesis]. Addis Ababa University; 2012. Available from: http://etd.aau.edu.et/dspace/handle/123456789/745

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Addis Ababa University

3. Zewdie, Getachew. BASEFLOW ANALYSIS OF RIVERS IN LAKE TANA SUB BASIN .

Degree: 2012, Addis Ababa University

URL: http://etd.aau.edu.et/dspace/handle/123456789/799

► The Lake Tana sub basin is situated on the northwestern plateau of Ethiopia at the headwaters of the Blue-Nile basin, west of the Afar depression.… (more)

▼ The Lake Tana sub basin is situated on the northwestern plateau of Ethiopia at the headwaters of the Blue-Nile basin, west of the Afar depression. The drainage area of the lake is approximately 15,000 square kilometers, of which 3062 is the lake area. Topographic high surrounding the basin forces the major River systems to drain toward Lake Tana. The altitude of the basin ranges between 1765m to 3000 m a.m.s.l. The climate of the region is ‘tropical highland monsoon’ with one rainy season between June and September. The rainfall data for 23 long-term records of rainfall stations lying within or around the Tana sub Basin are used for the computation of rainfall. The Tana sub Basin receives an average annual rainfall of 1329 mm. The air temperature shows small seasonal changes with an annual average of 20˚C. The major geological formations that outcrops in Lake Tana sub-basin and its adjacent areas are Tertiary and Quaternary volcanic rocks and alluvial along the major tributaries of the Lake Tana sub-basin. Alluvial sediments have limited distribution within Lake Tana sub-basin dominant at the eastern and northern side of the Lake. The understanding and knowledge of hydrology and hydrogeologic systems is very crucial for every activities involving economic development in the Lake Tana sub basin. Groundwater recharge is one of the most important factors governing the sustainable yield of groundwater and surface water exploitation. The recharge estimation of the Lake Tana sub basin was carried out based on the principle of base flow separation using HMS – SMA for gauged catchments on daily bases. The hydrological and meteorological data used for the period of 1992 to 2006. StatistiXL Multiple linear regression was used to estimate the runoff for ungauged catchments. A level of significance of 0.05 was used for the forward and backwards stepwise regressions. Climate and physical characteristics of the catchments were used in multiple regression to predict the flow characteristics of ungauged catchments. The amount of rainfall, topographic setting and geology are the main controlling factors of climate and physical characteristics of the catchments. The groundwater contribution from gauged catchments is about 161.17mm/yr or 12.1% of the total rainfall of the basin. The ungauged catchments contribute a total of 28.18 mm/yr or 2.28% of the total rainfall of the basin. Advisors/Committee Members: Seifu Kebede (PhD) (advisor).

Subjects/Keywords: HYDROGEOLOGY

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APA (6^th Edition):

Zewdie, G. (2012). BASEFLOW ANALYSIS OF RIVERS IN LAKE TANA SUB BASIN . (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/799

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zewdie, Getachew. “BASEFLOW ANALYSIS OF RIVERS IN LAKE TANA SUB BASIN .” 2012. Thesis, Addis Ababa University. Accessed February 18, 2020. http://etd.aau.edu.et/dspace/handle/123456789/799.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zewdie, Getachew. “BASEFLOW ANALYSIS OF RIVERS IN LAKE TANA SUB BASIN .” 2012. Web. 18 Feb 2020.

Vancouver:

Zewdie G. BASEFLOW ANALYSIS OF RIVERS IN LAKE TANA SUB BASIN . [Internet] [Thesis]. Addis Ababa University; 2012. [cited 2020 Feb 18]. Available from: http://etd.aau.edu.et/dspace/handle/123456789/799.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zewdie G. BASEFLOW ANALYSIS OF RIVERS IN LAKE TANA SUB BASIN . [Thesis]. Addis Ababa University; 2012. Available from: http://etd.aau.edu.et/dspace/handle/123456789/799

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Zambia

4. Mpamba, Ngosa Howard. Data acquisition models for groundwater assessment and management in the urban and rural areas of Zambia .

Degree: 2012, University of Zambia

URL: http://hdl.handle.net/123456789/1767

► Availability of data and information on groundwater is important for sustainable utilization of groundwater resources. Its assessment, development, utilization and management largely depend on data… (more)

▼ Availability of data and information on groundwater is important for sustainable utilization of groundwater resources. Its assessment, development, utilization and management largely depend on data acquisition; the aspect often overlooked or inconsistently carried out in most groundwater development projects in Zambia. The study attempts to develop a model for data acquisition procedure that recognizes three sets of groundwater data and information that need to be collected in a participatory approach in the urban and rural areas of Zambia. The data sets are hydro geological, groundwater quality and groundwater levels. Acquisition of these data sets is approached in two levels. Firstly, collection of the data sets as one entity with the involvement of stakeholders for potential use to support sustainable groundwater resources utilization. Secondly, development of the mechanism as well as tools to facilitate data collection, transmission, storage, analysis and dissemination. The methodology begins from an explicitly empirical conception of using the data set relations to investigate the quantity and quality of groundwater resources. Furthermore, it examines the nature of failure to collect groundwater data and information in Zambia, which has arisen due to mechanisms as well as tools for data acquisition that are weak, inappropriate or non-existent. The approach gives insight into some of the technical standards and regulations required to guide groundwater development and ensure submission of such data and information to relevant institutions. Groundwater occurrence, diversity, abstraction, replenishment and storage have been investigated in the study areas using data sets proposed for acquisition. Groundwater data and information captured with inclusion of global positioning system (GPS), shows that the approach would render existing hydro geological data useful for various analyzes. The main aspects in the collection of the data sets at national scale must: 1)recognize the borehole completion report form as official for collection of hydro geological data; 2)evaluate groundwater quality during construction of every borehole as a national interest, 3)ensure regular water quality evaluation and groundwater level measurement for selected aquifers as well as the national groundwater observation network to provide data to the National Groundwater Data Base to facilitate efficient resource management, 4)Incorporate a borehole numbering system based on the surface water basin blocks in the Zambezi and Congo River Basins, to facilitate sustainable groundwater resources development that recognizes surface and groundwater interaction.The thesis, through evaluation of past and current groundwater development approaches highlights the method used to collect data in the study areas, providing insight that data must be collected in the same manner from boreholes constructed in urban and rural areas of Zambia, as a way of promoting systematic data capture, as well as a better understanding of the economic value of groundwater…

Subjects/Keywords: Hydrogeology

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APA (6^th Edition):

Mpamba, N. H. (2012). Data acquisition models for groundwater assessment and management in the urban and rural areas of Zambia . (Thesis). University of Zambia. Retrieved from http://hdl.handle.net/123456789/1767

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mpamba, Ngosa Howard. “Data acquisition models for groundwater assessment and management in the urban and rural areas of Zambia .” 2012. Thesis, University of Zambia. Accessed February 18, 2020. http://hdl.handle.net/123456789/1767.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mpamba, Ngosa Howard. “Data acquisition models for groundwater assessment and management in the urban and rural areas of Zambia .” 2012. Web. 18 Feb 2020.

Vancouver:

Mpamba NH. Data acquisition models for groundwater assessment and management in the urban and rural areas of Zambia . [Internet] [Thesis]. University of Zambia; 2012. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/123456789/1767.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mpamba NH. Data acquisition models for groundwater assessment and management in the urban and rural areas of Zambia . [Thesis]. University of Zambia; 2012. Available from: http://hdl.handle.net/123456789/1767

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Montana State University

5. Clarke, William D. Hydrogeology of the Armstrong and Nelson Springs, Park County, Montana.

Degree: College of Letters & Science, 1991, Montana State University

URL: https://scholarworks.montana.edu/xmlui/handle/1/6976

Subjects/Keywords: Hydrogeology.

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APA (6^th Edition):

Clarke, W. D. (1991). Hydrogeology of the Armstrong and Nelson Springs, Park County, Montana. (Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/6976

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Clarke, William D. “Hydrogeology of the Armstrong and Nelson Springs, Park County, Montana.” 1991. Thesis, Montana State University. Accessed February 18, 2020. https://scholarworks.montana.edu/xmlui/handle/1/6976.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Clarke, William D. “Hydrogeology of the Armstrong and Nelson Springs, Park County, Montana.” 1991. Web. 18 Feb 2020.

Vancouver:

Clarke WD. Hydrogeology of the Armstrong and Nelson Springs, Park County, Montana. [Internet] [Thesis]. Montana State University; 1991. [cited 2020 Feb 18]. Available from: https://scholarworks.montana.edu/xmlui/handle/1/6976.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Clarke WD. Hydrogeology of the Armstrong and Nelson Springs, Park County, Montana. [Thesis]. Montana State University; 1991. Available from: https://scholarworks.montana.edu/xmlui/handle/1/6976

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Mississippi State University

6. Banks, John Vernon. Water supply potential of the Wilcox aquifers in Lafayette County, Mississippi.

Degree: MS, Geosciences, 2014, Mississippi State University

URL: http://sun.library.msstate.edu/ETD-db/theses/available/etd-04252014-142725/ ;

► The Meridian-upper Wilcox aquifer in Lafayette County, Mississippi, is the primary source of water for the public and industrial supply in the county. A… (more)

Subjects/Keywords: geology; hydrogeology

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APA (6^th Edition):

Banks, J. V. (2014). Water supply potential of the Wilcox aquifers in Lafayette County, Mississippi. (Masters Thesis). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-04252014-142725/ ;

Chicago Manual of Style (16^th Edition):

Banks, John Vernon. “Water supply potential of the Wilcox aquifers in Lafayette County, Mississippi.” 2014. Masters Thesis, Mississippi State University. Accessed February 18, 2020. http://sun.library.msstate.edu/ETD-db/theses/available/etd-04252014-142725/ ;.

MLA Handbook (7^th Edition):

Banks, John Vernon. “Water supply potential of the Wilcox aquifers in Lafayette County, Mississippi.” 2014. Web. 18 Feb 2020.

Vancouver:

Banks JV. Water supply potential of the Wilcox aquifers in Lafayette County, Mississippi. [Internet] [Masters thesis]. Mississippi State University; 2014. [cited 2020 Feb 18]. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-04252014-142725/ ;.

Council of Science Editors:

Banks JV. Water supply potential of the Wilcox aquifers in Lafayette County, Mississippi. [Masters Thesis]. Mississippi State University; 2014. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-04252014-142725/ ;

Victoria University of Wellington

7. Allen, Craig Wayne. Hydrological Characteristics of the Te Hapua Wetland Complex:The Potential Influence of Groundwater Level, Bore Abstraction and Climate Change on Wetland Surface Water Levels.

Degree: 2010, Victoria University of Wellington

URL: http://hdl.handle.net/10063/1419

► Te Hapua is a complex of small, privately owned wetlands approximately 60 km northwest of Wellington. The wetlands represent a large portion of the region's… (more)

▼ Te Hapua is a complex of small, privately owned wetlands approximately 60 km northwest of Wellington. The wetlands represent a large portion of the region's remaining palustrine swamps, which have been reduced to just 1% of the pre-1900 expanse. Whilst many land owners have opted to protect wetlands on their land with covenants, questions have been raised regarding potential threats stemming from the wider region. Firstly, some regional groundwater level records have shown significant decline in the 10 to 25 years they have been monitored. The reason for this is unclear. Wetlands are commonly associated with groundwater discharge, so a decline in groundwater level could adversely affect wetland water input. Secondly, estimated groundwater resources are currently just 8% allocated, so there is potential for a 92% increase in groundwater abstraction from aquifers that underlie the wetlands. Finally, predictions of future climate change indicate changes in rainfall quantity and intensity. This would likely alter the hydrological cycle, impacting on rainfall dependant ecosystems such as wetlands as well as groundwater recharge. Whilst previous ecological surveys at Te Hapua provide valuable information on biodiversity and ecological threat, there has been no detailed study of the hydrology of the wetlands. An understanding of the relationship between the surface water of the wetlands and the aquifers that underlie the area is important when considering the future viability of the wetlands. This study aims to define the local hydrology and assess the potential threat of 'long term' groundwater level decline, increased groundwater abstraction and predicted climate change. Eleven months of water level data was supplied by Wellington Regional Council for three newly constructed Te Hapua wetland surface water and adjacent shallow groundwater monitoring sites. The data were analysed in terms of their relative water levels and response to rainfall. A basic water balance was calculated using the data from the monitoring sites and a GIS analysis of elevation data mapped the wetlands and their watersheds. A survey of 21 individual wetlands was carried out to gather water quality and water regime data to enable an assessment of wetland class. Historical groundwater level trends and geological records were analysed in the context of potential threat to the wetlands posed by a decline in groundwater level. Climate change predictions for the Kapiti Coast were reviewed and discussed in the context of possible changes to the hydrological cycle and to wetlands. Results from the wetland survey indicated that there are two distinct bands of wetlands at Te Hapua. Fens are found mostly in the eastern band and are more likely to be discharge wetlands, some of which are ephemeral. Swamps are found mostly in the western band and are more likely to be recharge wetlands. Dominant water input to fens is via local rainfall and local through-flow of shallow groundwater, especially from surrounding dunes. The eastern band of wetlands is typified by… Advisors/Committee Members: Jackson, Bethanna.

Subjects/Keywords: Hydrogeology; Hydrology; Aquifers

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APA (6^th Edition):

Allen, C. W. (2010). Hydrological Characteristics of the Te Hapua Wetland Complex:The Potential Influence of Groundwater Level, Bore Abstraction and Climate Change on Wetland Surface Water Levels. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/1419

Chicago Manual of Style (16^th Edition):

Allen, Craig Wayne. “Hydrological Characteristics of the Te Hapua Wetland Complex:The Potential Influence of Groundwater Level, Bore Abstraction and Climate Change on Wetland Surface Water Levels.” 2010. Masters Thesis, Victoria University of Wellington. Accessed February 18, 2020. http://hdl.handle.net/10063/1419.

MLA Handbook (7^th Edition):

Allen, Craig Wayne. “Hydrological Characteristics of the Te Hapua Wetland Complex:The Potential Influence of Groundwater Level, Bore Abstraction and Climate Change on Wetland Surface Water Levels.” 2010. Web. 18 Feb 2020.

Vancouver:

Allen CW. Hydrological Characteristics of the Te Hapua Wetland Complex:The Potential Influence of Groundwater Level, Bore Abstraction and Climate Change on Wetland Surface Water Levels. [Internet] [Masters thesis]. Victoria University of Wellington; 2010. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/10063/1419.

Council of Science Editors:

Allen CW. Hydrological Characteristics of the Te Hapua Wetland Complex:The Potential Influence of Groundwater Level, Bore Abstraction and Climate Change on Wetland Surface Water Levels. [Masters Thesis]. Victoria University of Wellington; 2010. Available from: http://hdl.handle.net/10063/1419

East Carolina University

8. Owers, James E. Modeling Groundwater Inundation Under Sea-Level Rise Scenarios in the Surficial Aquifer of Bogue Banks, North Carolina.

Degree: 2017, East Carolina University

URL: http://hdl.handle.net/10342/6468

► Bogue Banks in North Carolina is expected to be impacted by sea-level rise, but the impact on the subsurface groundwater system is not well understood.… (more)

▼ Bogue Banks in North Carolina is expected to be impacted by sea-level rise, but the impact on the subsurface groundwater system is not well understood. A three-dimensional Visual MODFLOW steady-state model and ArcGIS 10.3 were used to quantify the extent of marine and groundwater inundation by the year 2100. Visual MODFLOW was used to simulate the water table on Bogue Banks, first at current sea-level then at different sea-level rise scenarios. The results from Visual MODFLOW were then imported into ArcGIS to calculate the area inundated by marine and groundwater inundation. Sea-level rise between 0.2 and 1.4 m above present conditions may occur at Bogue Banks and seven scenarios were envisioned as appropriate intervals to forecast. A total of 29 monitoring wells were installed in the surficial aquifer of Bogue Banks and equipped with water level loggers to collect groundwater data. Aquifer properties were constrained by studying sediment cores collected during well construction. Marine and groundwater inundation combine to impair 33% to 79% of the island by the year 2100, with 43% to 51% of the island being inundated in the most likely scenarios of 0.4 to 0.6 m of sea-level rise above current conditions. Marine inundation estimates range from 5% to 31% with 11% to 17% inundation in the most likely scenarios. Groundwater inundation estimates ranged from a minimum of 28% to 48% of the area not impaired by marine inundation, with the most likely range indicating 33% to 40% inundation. The results indicate that as sea-level rise increases in severity, groundwater inundation covers a much larger area of the island than marine impairment. The results of the study therefore suggest that as sea-level rises, residents of Bogue Banks may need to account for marine and groundwater inundation as the environment changes and sea-level rises. A greater understanding of the combined impacts of groundwater and marine inundation on barrier islands may be useful for coastal residents in mitigating or adapting to changes due to sea-level rise not just in North Carolina, but globally.

Subjects/Keywords: Groundwater; Inundation; Hydrogeology

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APA (6^th Edition):

Owers, J. E. (2017). Modeling Groundwater Inundation Under Sea-Level Rise Scenarios in the Surficial Aquifer of Bogue Banks, North Carolina. (Thesis). East Carolina University. Retrieved from http://hdl.handle.net/10342/6468

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Owers, James E. “Modeling Groundwater Inundation Under Sea-Level Rise Scenarios in the Surficial Aquifer of Bogue Banks, North Carolina.” 2017. Thesis, East Carolina University. Accessed February 18, 2020. http://hdl.handle.net/10342/6468.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Owers, James E. “Modeling Groundwater Inundation Under Sea-Level Rise Scenarios in the Surficial Aquifer of Bogue Banks, North Carolina.” 2017. Web. 18 Feb 2020.

Vancouver:

Owers JE. Modeling Groundwater Inundation Under Sea-Level Rise Scenarios in the Surficial Aquifer of Bogue Banks, North Carolina. [Internet] [Thesis]. East Carolina University; 2017. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/10342/6468.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Owers JE. Modeling Groundwater Inundation Under Sea-Level Rise Scenarios in the Surficial Aquifer of Bogue Banks, North Carolina. [Thesis]. East Carolina University; 2017. Available from: http://hdl.handle.net/10342/6468

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

California State University – Sacramento

9. Finney, David M. N. 3-D mapping of groundwater TDS using borehole geophysics and historical produced water geochemistry at the Midway-Sunset oil field, Kern County, California.

Degree: MS, Geology, 2019, California State University – Sacramento

URL: http://hdl.handle.net/10211.3/207975

► In California, a vast population and agricultural industry rely on groundwater for their main water supply source. Recent drought conditions have placed a higher demand… (more)

▼ In California, a vast population and agricultural industry rely on groundwater for their main water supply source. Recent drought conditions have placed a higher demand on groundwater resources, and in order to preserve this resource for future use, groundwater must be managed carefully. In areas where oil fields are located, there is concern that petroleum extraction operations and produced wastewater disposal are negatively impacting groundwater that may qualify as protected. To protect these waters, it is essential to know their location and extent. To accomplish this, we develop maps that locate the distribution of groundwater containing less than 10,000 parts per million (ppm) total dissolved solids (TDS) since these waters are more likely to qualify as protected. To map groundwater TDS at the Midway-Sunset oil field, we use the Stephens et al., [2018] method which relies on produced water geochemical measurements, TDS calculated using the RP method, and ordinary kriging. However, unlike the areas mapped by Stephens et al., [2018], the Midway-Sunset oil field presents unique challenges to mapping groundwater TDS. At the Midway-Sunset oil field, decades of enhanced oil recovery operations have led to significant variations in the geothermal gradient, while detrital diatomite in the sediments causes geophysical porosity logs to overestimate total porosity. This is a problem because TDS calculations require resistivity, temperature, and porosity data. The following thesis addresses these challenges to mapping groundwater TDS at Midway-Sunset in several key ways. Thermal effects from enhanced oil recovery were removed by only considering a subset of wells that were unaffected by thermal processes while three different porosity models were developed and tested for different regions of the field in order to remedy the diatomite-porosity-problem. The resulting calculated TDS values were then combined with existing geochemical measurements of TDS and kriged to generate salinity maps and cross sections for the Midway-Sunset oil field. In the northern portion of the field, the TDS maps and cross sections reveal that the depth to the 10,000 ppm TDS boundary extends to greater than ~-1500 feet elevation, while in the southern region the boundary is much shallower, with a maximum depth of ~150 feet elevation. In the study area, stratigraphy, faults, and freshwater recharge appear to control the distribution of groundwater TDS. Advisors/Committee Members: Shimabukuro, David.

Subjects/Keywords: Hydrogeology; Geostatistics; Kriging

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APA (6^th Edition):

Finney, D. M. N. (2019). 3-D mapping of groundwater TDS using borehole geophysics and historical produced water geochemistry at the Midway-Sunset oil field, Kern County, California. (Masters Thesis). California State University – Sacramento. Retrieved from http://hdl.handle.net/10211.3/207975

Chicago Manual of Style (16^th Edition):

Finney, David M N. “3-D mapping of groundwater TDS using borehole geophysics and historical produced water geochemistry at the Midway-Sunset oil field, Kern County, California.” 2019. Masters Thesis, California State University – Sacramento. Accessed February 18, 2020. http://hdl.handle.net/10211.3/207975.

MLA Handbook (7^th Edition):

Finney, David M N. “3-D mapping of groundwater TDS using borehole geophysics and historical produced water geochemistry at the Midway-Sunset oil field, Kern County, California.” 2019. Web. 18 Feb 2020.

Vancouver:

Finney DMN. 3-D mapping of groundwater TDS using borehole geophysics and historical produced water geochemistry at the Midway-Sunset oil field, Kern County, California. [Internet] [Masters thesis]. California State University – Sacramento; 2019. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/10211.3/207975.

Council of Science Editors:

Finney DMN. 3-D mapping of groundwater TDS using borehole geophysics and historical produced water geochemistry at the Midway-Sunset oil field, Kern County, California. [Masters Thesis]. California State University – Sacramento; 2019. Available from: http://hdl.handle.net/10211.3/207975

McMaster University

10. Lotimer, Leslea. Subsurface Stratigraphy and Hydrogeology of the Peterborough Drumlin Field, Southern Ontario, Canada.

Degree: MSc, 2014, McMaster University

URL: http://hdl.handle.net/11375/16072

► The Peterborough Drumlin Field in southern Ontario, Canada (PDF; Crozier 1975, Karrow 1981, Boyce and Eyles 1991) is a well-documented and extensive drumlin field that… (more)

▼ The Peterborough Drumlin Field in southern Ontario, Canada (PDF; Crozier 1975, Karrow 1981, Boyce and Eyles 1991) is a well-documented and extensive drumlin field that hosts many communities dependent upon groundwater resources. Population growth in the area and concerns for the long-term sustainability of these resources has prompted considerable interest in determining the location, extent and potential productivity of subsurface aquifers in the region. The origin of the drumlins within the PDF is still widely debated, despite many years of study, and there is little understanding of the nature, geometry, and connectivity of aquifers within the Quaternary-age sediments beneath the drumlins. This study involves detailed analysis of sedimentological data available from water well logs from selected drumlins and adjacent low areas (swales) in the PDF. These data are used to investigate the subsurface stratigraphy of the drumlins, contribute to the understanding of drumlin formation, and establish hydrogeological characteristics of drumlins within the PDF. A relatively consistent subsurface stratigraphy can be identified in the studied drumlins consisting of patchy units of sand and gravel overlying a southward sloping bedrock surface, a thick diamict (till) package containing discontinuous coarse-grained sand and gravel units, and surface veneers of sand, silt or clay in low areas (swales) between drumlins. This subsurface stratigraphy can be traced between drumlins and adjacent swales and suggests that the drumlins within the PDF formed largely as a result of subglacial erosion of pre-existing sediment. Two major aquifers can be identified beneath the PDF from the water well records; one is a basal aquifer within fractured bedrock and overlying coarse-grained sands and gravels, and the second (upper aquifer) is formed by the discontinuous zone of sands and gravels within till. These coarse-grained interbeds within the till allow it to function as a ‘leaky aquitard’ and produce groundwater flow pathways that are not easy to predict, may not be high-yielding, and may be susceptible to anthropogenic sources of contamination; these characteristics will likely prevent further development of this aquifer for multi-user (communal) water supply. The Hiawatha First Nations (HFN) community is located within the Peterborough Drumlin Field and has been attempting to find a more sustainable, and possibly communal, groundwater supply in the drumlizined terrain. Examination of lithological and hydrogeological data from water well records together with information obtained from four recently drilled on-site wells allowed for a detailed analysis of the till stratigraphy within this portion of the drumlin field. The stratigraphy identified at this site is consistent with that identified elsewhere in the PDF and a basal bedrock aquifer and an upper discontinuous Quaternary aquifer can be discriminated. It is recommended that the HFN community continue to upgrade/maintain individual private wells in the discontinuous… Advisors/Committee Members: Eyles, Carolyn, Earth and Environmental Sciences.

Subjects/Keywords: Drumlins; Hydrogeology; Stratigraphy

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APA (6^th Edition):

Lotimer, L. (2014). Subsurface Stratigraphy and Hydrogeology of the Peterborough Drumlin Field, Southern Ontario, Canada. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/16072

Chicago Manual of Style (16^th Edition):

Lotimer, Leslea. “Subsurface Stratigraphy and Hydrogeology of the Peterborough Drumlin Field, Southern Ontario, Canada.” 2014. Masters Thesis, McMaster University. Accessed February 18, 2020. http://hdl.handle.net/11375/16072.

MLA Handbook (7^th Edition):

Lotimer, Leslea. “Subsurface Stratigraphy and Hydrogeology of the Peterborough Drumlin Field, Southern Ontario, Canada.” 2014. Web. 18 Feb 2020.

Vancouver:

Lotimer L. Subsurface Stratigraphy and Hydrogeology of the Peterborough Drumlin Field, Southern Ontario, Canada. [Internet] [Masters thesis]. McMaster University; 2014. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/11375/16072.

Council of Science Editors:

Lotimer L. Subsurface Stratigraphy and Hydrogeology of the Peterborough Drumlin Field, Southern Ontario, Canada. [Masters Thesis]. McMaster University; 2014. Available from: http://hdl.handle.net/11375/16072

Queens University

11. Worley, Jessica. The Use of Pumping Tests to Measure the Vertical Hydraulic Properties of Sedimentary Rock Formations .

Degree: Civil Engineering, 2012, Queens University

URL: http://hdl.handle.net/1974/7470

► An analytical model is presented for the interpretation of pumping tests conducted in a fractured rock aquifer. The solution accommodates multiple horizontal fractures intersecting pumping… (more)

▼ An analytical model is presented for the interpretation of pumping tests conducted in a fractured rock aquifer. The solution accommodates multiple horizontal fractures intersecting pumping and observation wells with interconnecting vertical fracture features. The uppermost horizontal fracture is connected via this fracture network to a free surface boundary. Wellbore storage is included at the pumping and observation wells using an approximate superposition technique and the solution is derived using the Laplace transform method. Evaluation is performed by numerical inversion using the Talbot algorithm. Sensitivity of the model to the governing hydraulic parameters for both pumping and observation well data is presented for a realistic range of values for fractured rock. A field example is given to demonstrate the application of the model and to explore the uniqueness of the interpreted values. Based on the results obtained using the present analytical model, estimation of unique values of the vertical hydraulic parameters in a sedimentary rock setting may not be possible using pumping test results. Subsequently, measuring aquifer properties from various testing methods was investigated to explore the significance of fracture heterogeneities relative to tested volumes and to determine which testing methods were capable of producing reliable parameter estimates. The hydrogeological study was performed in a fractured sedimentary rock aquifer using four different field testing methods: constant head tests, pulse interference tests, 12-hour isolated interval pumping tests and 48-hour open-hole pumping tests. Particular emphasis was placed on the reliable estimation of vertical hydraulic parameters in this setting. The evaluation of the pumping test data was performed using the analytical model derived earlier to determine whether the new pumping test model could produce confident estimates of vertical hydraulic parameters. While estimates of horizontal hydraulic conductivity measurements were not affected by test method, open-well pumping tests do not appear able to predict values of vertical hydraulic conductivity and specific yield. Alternatively, pulse interference tests may be a less time-intensive option to constant head injection tests for determining vertical parameters in a sedimentary rock setting.

Subjects/Keywords: Hydrogeology; Fractured Media

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APA (6^th Edition):

Worley, J. (2012). The Use of Pumping Tests to Measure the Vertical Hydraulic Properties of Sedimentary Rock Formations . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/7470

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Worley, Jessica. “The Use of Pumping Tests to Measure the Vertical Hydraulic Properties of Sedimentary Rock Formations .” 2012. Thesis, Queens University. Accessed February 18, 2020. http://hdl.handle.net/1974/7470.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Worley, Jessica. “The Use of Pumping Tests to Measure the Vertical Hydraulic Properties of Sedimentary Rock Formations .” 2012. Web. 18 Feb 2020.

Vancouver:

Worley J. The Use of Pumping Tests to Measure the Vertical Hydraulic Properties of Sedimentary Rock Formations . [Internet] [Thesis]. Queens University; 2012. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/1974/7470.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Worley J. The Use of Pumping Tests to Measure the Vertical Hydraulic Properties of Sedimentary Rock Formations . [Thesis]. Queens University; 2012. Available from: http://hdl.handle.net/1974/7470

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

12. Sumi, Ernesto Massayoshi. Estudo hidrogeológico de um aterro sanitário instalado em uma antiga área de disposição irregular de resíduos sólidos.

Degree: Mestrado, Hidrogeologia e Meio Ambiente, 2009, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/44/44138/tde-08092009-142956/ ;

►

No passado, a disposição de resíduos sólidos sem nenhum tipo de tratamento e controle era algo normal e muito praticado. Em conseqüência, as áreas de… (more)

▼

No passado, a disposição de resíduos sólidos sem nenhum tipo de tratamento e controle era algo normal e muito praticado. Em conseqüência, as áreas de disposição transformaram-se em um sério problema de caráter ambiental e de saúde pública. Uma solução encontrada foi reutilizar essas áreas como depósitos de resíduos sólidos, mas agora de forma segura em construções conhecidas como aterros sanitários. O objetivo do presente trabalho é analisar a água subterrânea sob uma célula de disposição de resíduo de origem municipal construída em um antigo terreno utilizado como depósito indiscriminado. Para isso, foram pesquisadas as características físicas da área (geomorfologia, geologia, hidrometeorologia e hidrogeologia). A partir da hidrometeorologia, foi estimada a quantidade de água meteórica sob a célula central e esta foi comparada com a produção de lixiviado produzido na célula central, a diferença entre o estimado (34.006m3) e o produzido (36.338m3) foi de 6,42% para o ano de 2005. Para obter a caracterização da qualidade da água subterrânea foram realizadas amostragens da água subterrânea e água superficial em torno da célula central ao longo dos anos de 2005 e 2006, com intervalos de três meses entre uma campanha e outra. Os parâmetros que apresentaram resultados acima dos valores orientadores para águas subterrâneas (CETESB, 2005 e Portaria 518, 2004) foram: alumínio total, arsênio total, bário total, chumbo total, cloreto total, coliformes totais, cor, ferro total, manganês total, mercúrio total, níquel total, sólidos dissolvidos totais, sulfato e turbidez. Já os parâmetros que apresentaram resultados acima dos valores de intervenção para águas superficiais classe III (CONAMA, 2005) foram: alumínio total, cor, fosfato total, fósforo total, manganês total, odor, óleos e graxas e sólidos totais. Os resultados dessas análises indicam que existe uma alteração das águas, provavelmente devido aos antigos resíduos que ainda são uma fonte de contaminação, mas não apresentaram evidências de que a célula central de disposição de resíduos esteja participando da alteração da água subterrânea e superficial.

In the past, the disposal of solid residue without any type of treatment and control was a common and widespread practice. As a result of that, the old areas used as dump have become a serious environmental and public health problem. Some of these areas are being reused in constructions now known as landfills, this time in a way that they arent a threat anymore. The objective of this research is to analyze the groundwater under a municipal area of residue disposal built on the land of an old irregular dump. For this purpose, the physical characteristics of the area (geomorphology, geology, hydrometeorology and hydrogeology) were studied. With the results from the hydrometeorology analyzes it was possible to estimate the quantity of meteoric water under the central cell which was compared to the production of leachate in the central cell; the difference between the estimated (34.006m3 ) and the produced (36.338m3) was…

Advisors/Committee Members: Duarte, Uriel.

Subjects/Keywords: Aterro sanitário; Hidrogeologia; Hydrogeology; Landfill

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APA (6^th Edition):

Sumi, E. M. (2009). Estudo hidrogeológico de um aterro sanitário instalado em uma antiga área de disposição irregular de resíduos sólidos. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/44/44138/tde-08092009-142956/ ;

Chicago Manual of Style (16^th Edition):

Sumi, Ernesto Massayoshi. “Estudo hidrogeológico de um aterro sanitário instalado em uma antiga área de disposição irregular de resíduos sólidos.” 2009. Masters Thesis, University of São Paulo. Accessed February 18, 2020. http://www.teses.usp.br/teses/disponiveis/44/44138/tde-08092009-142956/ ;.

MLA Handbook (7^th Edition):

Sumi, Ernesto Massayoshi. “Estudo hidrogeológico de um aterro sanitário instalado em uma antiga área de disposição irregular de resíduos sólidos.” 2009. Web. 18 Feb 2020.

Vancouver:

Sumi EM. Estudo hidrogeológico de um aterro sanitário instalado em uma antiga área de disposição irregular de resíduos sólidos. [Internet] [Masters thesis]. University of São Paulo; 2009. [cited 2020 Feb 18]. Available from: http://www.teses.usp.br/teses/disponiveis/44/44138/tde-08092009-142956/ ;.

Council of Science Editors:

Sumi EM. Estudo hidrogeológico de um aterro sanitário instalado em uma antiga área de disposição irregular de resíduos sólidos. [Masters Thesis]. University of São Paulo; 2009. Available from: http://www.teses.usp.br/teses/disponiveis/44/44138/tde-08092009-142956/ ;

Texas A&M University

13. De Leon, Tiffany Lucinda. Evaluation of Collector Well Configurations to Model Hydrodynamics in Riverbank Filtration and Groundwater Remediation.

Degree: 2011, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8244

► Collector well designs are necessary to maximize groundwater uptake and riverbank filtration without negatively impacting an aquifer. Unfortunately, there is a lack of information and… (more)

▼ Collector well designs are necessary to maximize groundwater uptake and riverbank filtration without negatively impacting an aquifer. Unfortunately, there is a lack of information and research regarding the implementation of collector well design parameters. In the past, collector well installation was too costly, but recent advances in well technology have made collector wells more cost effective. This research will contribute a set of guidelines to optimize riverbank filtration and groundwater remediation. This study models the hydrodynamics surrounding collector well configurations in riverbank filtration and groundwater remediation. Visual Modflow? was utilized to run a variety of numerical models to test four areas: flux along the laterals of a collector well, collector well interactions with a river, collector well yield, and collector well remediation capability. The two design parameters investigated were lateral length (25 m, 50 m, and 100 m) and number of laterals (3 and 4). The lateral flux tests confirm flux increases towards the terminal end of each lateral and pumping rate is the controlling factor in flux amount obtained along the laterals. The analysis of the flux-river interaction shows the main factor in determining flux amount is the initial river geometry, followed by the pumping rate, regional background flow, and collector well design, respectively. The models suggest that the 4-lateral collector well design is more effective than the 3-lateral design and in addition, 100 meter length laterals provide the highest amount of yield with the least amount of drawdown. The remediation tests investigate the application of vertical well equations to evaluate collector well designs in two areas: minimum pumping rate to capture line source of particles and first arrival time of particles. The remediation models show 100 meter length laterals provide both the lowest pumping rate and the highest residence time with the surrounding aquifer for maximum remediation. Ultimately, these models provide basic design guidelines and explain which designs are most effective, depending on the collector well purpose. Advisors/Committee Members: Zhan, Hongbin (advisor), Giardino, John R. (committee member), Herbert, Bruce (committee member).

Subjects/Keywords: Collector Well; Hydrogeology; Riverbank Filtration

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APA (6^th Edition):

De Leon, T. L. (2011). Evaluation of Collector Well Configurations to Model Hydrodynamics in Riverbank Filtration and Groundwater Remediation. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8244

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

De Leon, Tiffany Lucinda. “Evaluation of Collector Well Configurations to Model Hydrodynamics in Riverbank Filtration and Groundwater Remediation.” 2011. Thesis, Texas A&M University. Accessed February 18, 2020. http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8244.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

De Leon, Tiffany Lucinda. “Evaluation of Collector Well Configurations to Model Hydrodynamics in Riverbank Filtration and Groundwater Remediation.” 2011. Web. 18 Feb 2020.

Vancouver:

De Leon TL. Evaluation of Collector Well Configurations to Model Hydrodynamics in Riverbank Filtration and Groundwater Remediation. [Internet] [Thesis]. Texas A&M University; 2011. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8244.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

De Leon TL. Evaluation of Collector Well Configurations to Model Hydrodynamics in Riverbank Filtration and Groundwater Remediation. [Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8244

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

14. Dugat, William D., IV. Interactions and Implications of a Collector Well with a River in an Unconfined Aquifer with Regional Background Flow.

Degree: 2010, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-879

► Ranney radial collector wells consist of an array of horizontal lateral wells arranged radially around and connected to the base of a vertical well. They… (more)

Subjects/Keywords: Hydrogeology; Horizontal Well; collector well

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APA (6^th Edition):

Dugat, William D., I. (2010). Interactions and Implications of a Collector Well with a River in an Unconfined Aquifer with Regional Background Flow. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-879

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Dugat, William D., IV. “Interactions and Implications of a Collector Well with a River in an Unconfined Aquifer with Regional Background Flow.” 2010. Thesis, Texas A&M University. Accessed February 18, 2020. http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-879.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Dugat, William D., IV. “Interactions and Implications of a Collector Well with a River in an Unconfined Aquifer with Regional Background Flow.” 2010. Web. 18 Feb 2020.

Vancouver:

Dugat, William D. I. Interactions and Implications of a Collector Well with a River in an Unconfined Aquifer with Regional Background Flow. [Internet] [Thesis]. Texas A&M University; 2010. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-879.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Dugat, William D. I. Interactions and Implications of a Collector Well with a River in an Unconfined Aquifer with Regional Background Flow. [Thesis]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-879

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rice University

15. Siegel, Jacob. Evolution of Glacially Derived Freshwater and Overpressure in the Massachusetts Shelf: An Integration of Geophysical and Numerical Methods.

Degree: PhD, Natural Sciences, 2013, Rice University

URL: http://hdl.handle.net/1911/77523

► The continental shelf offshore Massachusetts, USA experienced repeated glaciations throughout the late Pleistocene that emplaced freshwater and generated overpressure in the shelf sediments that still… (more)

▼ The continental shelf offshore Massachusetts, USA experienced repeated glaciations throughout the late Pleistocene that emplaced freshwater and generated overpressure in the shelf sediments that still remains offshore. To show this, I processed and interpreted high-resolution, multi-channel seismic data that was collected offshore Massachusetts to infer the glacial history and to incorporate the glacial history into numerical modeling. Interpretations of the seismic data reveal the shelf stratigraphy and the location of a late Pleistocene (Marine Oxygen Isotope Stage 12) ice sheet. The ice sheet extended 100 km farther onto the shelf compared to the Laurentide ice sheet during the Last Glacial Maximum (LGM). It also contained an ice stream that was likely sourced from the Gulf of Maine. I show that the late Pleistocene ice sheet influenced the shelf hydrogeology by generating overpressure and emplacing freshwater into the shelf sediments. Overpressure is modeled in 1D from high-resolution, full-waveform inversion p-wave velocities obtained from the seismic data and from a finite-difference fluid flow model that accounts for sedimentation and ice sheet loading. The results demonstrate how loading from the late Pleistocene ice sheet caused focused fluid flow that created localized zones of overpressure nearly 1-2 MPa in offshore sediments. Freshwater emplacement into shelf sediments is estimated with a finite-element, variable-density model of fluid flow and heat and solute transport that accounts for ice-sheet loading and sea-level change. The model helps explain how the late Pleistocene ice sheet emplaced nearly 100 km3 of freshwater into the sediments. Our results thus integrate seismic interpretations of ice sheet history with numerical techniques of fluid flow modeling to show how the past glacial history influenced the present freshwater distribution. Advisors/Committee Members: Dugan, Brandon (advisor), Gonnermann, Helge M. (committee member), Anderson, John B. (committee member), Bedient, Philip B. (committee member).

Subjects/Keywords: Geophysics; Hydrogeology; Pleistocene; Glaciations

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Siegel, J. (2013). Evolution of Glacially Derived Freshwater and Overpressure in the Massachusetts Shelf: An Integration of Geophysical and Numerical Methods. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/77523

Chicago Manual of Style (16^th Edition):

Siegel, Jacob. “Evolution of Glacially Derived Freshwater and Overpressure in the Massachusetts Shelf: An Integration of Geophysical and Numerical Methods.” 2013. Doctoral Dissertation, Rice University. Accessed February 18, 2020. http://hdl.handle.net/1911/77523.

MLA Handbook (7^th Edition):

Siegel, Jacob. “Evolution of Glacially Derived Freshwater and Overpressure in the Massachusetts Shelf: An Integration of Geophysical and Numerical Methods.” 2013. Web. 18 Feb 2020.

Vancouver:

Siegel J. Evolution of Glacially Derived Freshwater and Overpressure in the Massachusetts Shelf: An Integration of Geophysical and Numerical Methods. [Internet] [Doctoral dissertation]. Rice University; 2013. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/1911/77523.

Council of Science Editors:

Siegel J. Evolution of Glacially Derived Freshwater and Overpressure in the Massachusetts Shelf: An Integration of Geophysical and Numerical Methods. [Doctoral Dissertation]. Rice University; 2013. Available from: http://hdl.handle.net/1911/77523

University of Akron

16. Check, Daniel F. HIGH-RESOLUTION MONITORING OF ANTHROPOGENIC GROUNDWATER FLOW MODIFICATION: MONROE COUNTY, WEST VIRGINIA.

Degree: MS, Geology-Environmental Geology, 2007, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1185476150

► In 1997, the drilling of a residential well resulted in catastrophic, ongoing groundwater leakage into Scott Hollow Cave, at a depth of approximately 120 meters… (more)

▼ In 1997, the drilling of a residential well resulted in catastrophic, ongoing groundwater leakage into Scott Hollow Cave, at a depth of approximately 120 meters below the land surface. The cave system is on the Appalachian Plateau in southeastern West Virginia, within the Hillsdale Limestone and Maccrady Shale. Initial spot measurements of solutes showed that the leaking water had low nitrate, high sulfate, and was saturated with respect to calcite. This indicated long aquifer residence time, and minimal recharge from overlying agricultural lands. Spot measurements of discharge showed a trend of generally decreasing flow. This, in concert with loss of yield from surrounding wells, suggested that the drainage was causing substantial dewatering of one or more aquifers. To evaluate the long term effects on the aquifer(s), high-resolution monitoring of the leaking water was undertaken. A custom-built orifice weir, a transducer stage recorder, and conductivity and temperature sensors were installed in order to undertake the monitoring. The parameters were collected in both long-term (20-minute) and short-term (8 second) intervals on data loggers. In addition, grab samples were acquired at irregular intervals to measure pH and major ion concentrations, which allowed for conductance to be used as a proxy for overall water chemistry. Discharge has varied between 4.4 and 8.3 m3/hr over the approximately one-year period of investigation. The data show a rich structure not apparent from the initial spot interval sampling. Several different patterns of flow variance occur. The first pattern involves frequent downward spikes of magnitude 0.10 to 1.77 m3/hr, which last less than one time interval (20 minutes), and recur on the scale of minutes to hours. This pattern is caused by the pumping of a nearby residential well. A second pattern is a pseudo-sinusoidal undulation that is superimposed upon the long-term discharge, occurring for periods of hours to days, with a variation of up to +/- 0.25 m3/hr. This pattern is due to atmospheric loading caused by fluctuations in barometric (atmospheric) pressure. Finally, on a scale of months, a trend of long-term declining discharge, which consists of a gentle downward slope of approximately 0.2 m3/hr per month is seen. This pattern shows the continuous drainage and decline of one or more aquifers. Long-term measurements of conductivity and temperature also displayed short-term spikes, with the conductivity spikes occurring in a downward direction and the temperature spikes occurring in an upward direction. Conductivity spikes varied in magnitude between a drop of 0.687 µS/cm for the smallest spikes and a drop of 15.85 µS/cm for the largest spikes. Temperature spikes varied between an increase of 0.0047 °C and 0.0284 °C throughout the period of the study. High-resolution (8-second interval) monitoring of the parameters discharge, conductivity, and temperature was also undertaken. This monitoring revealed a connection between the major spikes of each of the parameters being monitored, where… Advisors/Committee Members: Sasowsky, Ira (Advisor).

Subjects/Keywords: Karst; Hydrogeology; Groundwater; Well

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APA (6^th Edition):

Check, D. F. (2007). HIGH-RESOLUTION MONITORING OF ANTHROPOGENIC GROUNDWATER FLOW MODIFICATION: MONROE COUNTY, WEST VIRGINIA. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1185476150

Chicago Manual of Style (16^th Edition):

Check, Daniel F. “HIGH-RESOLUTION MONITORING OF ANTHROPOGENIC GROUNDWATER FLOW MODIFICATION: MONROE COUNTY, WEST VIRGINIA.” 2007. Masters Thesis, University of Akron. Accessed February 18, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron1185476150.

MLA Handbook (7^th Edition):

Check, Daniel F. “HIGH-RESOLUTION MONITORING OF ANTHROPOGENIC GROUNDWATER FLOW MODIFICATION: MONROE COUNTY, WEST VIRGINIA.” 2007. Web. 18 Feb 2020.

Vancouver:

Check DF. HIGH-RESOLUTION MONITORING OF ANTHROPOGENIC GROUNDWATER FLOW MODIFICATION: MONROE COUNTY, WEST VIRGINIA. [Internet] [Masters thesis]. University of Akron; 2007. [cited 2020 Feb 18]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1185476150.

Council of Science Editors:

Check DF. HIGH-RESOLUTION MONITORING OF ANTHROPOGENIC GROUNDWATER FLOW MODIFICATION: MONROE COUNTY, WEST VIRGINIA. [Masters Thesis]. University of Akron; 2007. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1185476150

Penn State University

17. Moret, Geoffrey John Maxted. ANNUAL VARIATIONS IN GROUND-WATER TEMPERATURE AS A TRACER OF.

Degree: PhD, Geoscience, 2007, Penn State University

URL: https://etda.libraries.psu.edu/catalog/8007

► In recent years, annual and diurnal variations in aquifer temperature have increasingly been used to investigate surface-water-ground-water interactions. This thesis represents three separate but related… (more)

▼ In recent years, annual and diurnal variations in aquifer temperature have increasingly been used to investigate surface-water-ground-water interactions. This thesis represents three separate but related investigations into the value of annual temperature in characterizing and quantifying infiltration from surface-water bodies. Currently, there is a great deal of interest in the exchange between the Rio Grande and the underlying aquifer in Albuquerque, New Mexico so that surface stream depletion can be properly estimated. The USGS has collected temperature time series in a series of piezometers along a profile perpendicular to the river to characterize horizontal flow. The current method for interpreting these data is to calibrate a 2-D numerical model of the aquifer, a process that can be time-consuming. We propose that a simple 1-D analytical solution can be used to estimate horizontal flux through an aquifer based on temperature variations. This analytical model does not fully represent all of the factors that contribute to aquifer temperature signals, but in many cases it may represent the system sufficiently well to produce a useful estimate of ground-water flux. At the Mohawk River site near Schenectady, NY, a large number of wells drilled to characterize induced infiltration have permitted spatially extensive measurements of the annual variation in aquifer temperature. These data show a zone of high temperature variation caused by a plume of infiltrated river water pulled towards municipal supply wells. The aquifer at the site is highly transmissive, so we developed a method-of-characteristics, particle-tracking code to model the advection-dominated thermal transport. Our model of the site shows that the plume of high temperature variation is caused by aquifer thickening over a known bedrock depression. The annual temperature variation data were also sensitive to the magnitude and spatial variation of the riverbed conductance. The results of this study suggest that numerical modeling is required to fully understand temperature data collected in aquifers with complex geometries. If the spatial distribution of temperature measurements is sufficiently dense, then high transmissivity zones acting as preferential flow paths for infiltrated surface-water can be identified. A limitation of this method is that ground-water temperature can be measured only in wells or in natural discharge points. For some shallow aquifers, however, this temperature reversal can be seen in temperature measurements taken in shallow soil borings. By collecting temperature data in a large number of shallow soil borings, preferential flow paths in shallow soil borings can be mapped. In this paper we model soil temperature variations, investigate the range of conditions under which aquifer temperature variations can be detected, and demonstrate the technique with a data set from a site along the Mohawk River near Schenectady, New York.

Subjects/Keywords: hydrogeology; temperature

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APA (6^th Edition):

Moret, G. J. M. (2007). ANNUAL VARIATIONS IN GROUND-WATER TEMPERATURE AS A TRACER OF. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/8007

Chicago Manual of Style (16^th Edition):

Moret, Geoffrey John Maxted. “ANNUAL VARIATIONS IN GROUND-WATER TEMPERATURE AS A TRACER OF.” 2007. Doctoral Dissertation, Penn State University. Accessed February 18, 2020. https://etda.libraries.psu.edu/catalog/8007.

MLA Handbook (7^th Edition):

Moret, Geoffrey John Maxted. “ANNUAL VARIATIONS IN GROUND-WATER TEMPERATURE AS A TRACER OF.” 2007. Web. 18 Feb 2020.

Vancouver:

Moret GJM. ANNUAL VARIATIONS IN GROUND-WATER TEMPERATURE AS A TRACER OF. [Internet] [Doctoral dissertation]. Penn State University; 2007. [cited 2020 Feb 18]. Available from: https://etda.libraries.psu.edu/catalog/8007.

Council of Science Editors:

Moret GJM. ANNUAL VARIATIONS IN GROUND-WATER TEMPERATURE AS A TRACER OF. [Doctoral Dissertation]. Penn State University; 2007. Available from: https://etda.libraries.psu.edu/catalog/8007

Penn State University

18. Lauer, Rachel Mollie. Subduction zone hydrogeology: quantifying fluid sources, pathways and pressure.

Degree: PhD, Geoscience, 2013, Penn State University

URL: https://etda.libraries.psu.edu/catalog/19788

► Subduction zone fluids and fluid pressure distribution exert fundamental controls on the transport of heat and volatiles, and their associated distribution throughout the forearc. Additionally,… (more)

▼ Subduction zone fluids and fluid pressure distribution exert fundamental controls on the transport of heat and volatiles, and their associated distribution throughout the forearc. Additionally, excess fluid pressures have been proposed as a mechanism governing fault slip behavior, including their association with slow-slip events (SSE), episodic tremor and slip (ETS) and very-low frequency earthquakes throughout the conditionally stable region of the outer forearc. Fluid pressures develop as subducted sediments compact during tectonic burial, and through the production of dehydration derived fluids at depths associated with higher temperatures, and low porosity. Due to their production in a low porosity environment, the dehydration sources have an enhanced potential for pressurization, and the location of these reactions is therefore critical to understanding the mechanical strength of the plate boundary décollement, as it is mediated by the fluid pressure distribution. In an effort to further our understanding of fluid distribution in the forearc, I first develop a fluid budget using a numerical model parameterized by a combination of data obtained through ocean drilling, and laboratory testing of recovered sediments, which estimate the compaction behavior during subduction, and associated permeability reduction. Previous efforts to quantify the fluid budget did not include permeable splay faults, despite geochemical and geophysical evidence that they represent regions of focused flow, and provide a hydraulic connection from the source of fluids at the plate boundary, to the seafloor. The model results suggest that faults capture up to 35% of the total flux, and modeled flow rates are highly consistent with studies of both seafloor seeps, and flow at the trench, suggesting a quantitative link between the underlying permeability architecture of the forearc and flow rates at the seafloor. The results highlight the importance of these features in efficiently channeling heat and solutes from depth. iii The second study examines the importance of faults in the determining the distribution of fluid pressures and deeply sourced fluids by coupling the results of dehydration modeling with a flow and transport model. The dehydration derived freshwater effectively acts as a tracer to consider the role of faults in distributing deeply sourced fluids, and translating fluid pressures away from the plate boundary. Model results indicate that faults are efficient translators of fluids, and capture deeply sourced fluids before they reach the trench. Overpressures develop at the base of the slope sediments, regardless of the permeability architecture employed, suggesting a potential mechanism for the formation of mud volcanoes, spatially correlated with faults that penetrate the forearc. The results of a comprehensive heat-flow campaign offshore Costa Rica suggests plate boundary temperatures are much lower than previously thought, with dehydration reactions shifted farther down-dip, into regions of further depleted porosity. The…

Subjects/Keywords: subduction zone; hydrogeology; earthquake mechanics

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APA (6^th Edition):

Lauer, R. M. (2013). Subduction zone hydrogeology: quantifying fluid sources, pathways and pressure. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/19788

Chicago Manual of Style (16^th Edition):

Lauer, Rachel Mollie. “Subduction zone hydrogeology: quantifying fluid sources, pathways and pressure.” 2013. Doctoral Dissertation, Penn State University. Accessed February 18, 2020. https://etda.libraries.psu.edu/catalog/19788.

MLA Handbook (7^th Edition):

Lauer, Rachel Mollie. “Subduction zone hydrogeology: quantifying fluid sources, pathways and pressure.” 2013. Web. 18 Feb 2020.

Vancouver:

Lauer RM. Subduction zone hydrogeology: quantifying fluid sources, pathways and pressure. [Internet] [Doctoral dissertation]. Penn State University; 2013. [cited 2020 Feb 18]. Available from: https://etda.libraries.psu.edu/catalog/19788.

Council of Science Editors:

Lauer RM. Subduction zone hydrogeology: quantifying fluid sources, pathways and pressure. [Doctoral Dissertation]. Penn State University; 2013. Available from: https://etda.libraries.psu.edu/catalog/19788

Southern Illinois University

19. Keller, John Edward. Accurate Cylindrical-Coordinate Numerical Models For The Analysis Of Hydrologic Tests.

Degree: PhD, Agricultural Sciences, 2009, Southern Illinois University

URL: http://opensiuc.lib.siu.edu/dissertations/57

► Analytical solutions to well hydraulic problems have restrictive assumptions that often do not match real world conditions. Although numerical models more closely match reality, they… (more)

▼ Analytical solutions to well hydraulic problems have restrictive assumptions that often do not match real world conditions. Although numerical models more closely match reality, they either ran too slowly to be practical or lacked accuracy because of coarse grid spacing and large time steps. Advances in computer power over the last few decades now allow for accurate, fast numerical models that handle complex flow systems. The purpose of this dissertation was to develop flexible and accurate numerical modeling codes for the simulation of hydrologic tests. One of these numerical modeling codes, the Slug Test Simulator (STS), was designed for the mechanics of a single well test, or slug test. STS can handle a variety of conditions including unconfined flow, partial penetration, layered heterogeneities, and the presence of a homogeneous well skin like existing codes. This program also extends on the capabilities of earlier codes with its ability to simulate a heterogeneous skin where K can vary in both the radial and vertical directions. STS has a clear user interface, can display graphical results, and allows the user to determine hydraulic conductivity through a trial-and-error curve-matching process. Comparisons of STS to the Cooper-Bredehoeft-Papadopulos analytical solution and the Kansas Geological Survey (KGS) semi-analytical solution produced near-identical curves under a wide variety of conditions. Numerous analytical studies have shown that the well skin is an important factor in the underestimation of hydraulic conductivity in slug tests. STS allows for the exploration of the well skin issue under conditions too complex for analytical models. Model trials revealed two key discoveries: 1) if any layers within the skin have the same hydraulic conductivity as the surrounding formation, flow is concentrated within these conduits and the resultant head response approaches the case when no skin is present; and 2) the two most important properties in determining the overall influence of the skin are specific storage and skin thickness. The first discovery suggests that extensive development activities can essentially eliminate any well skin impacts. Other factors such as partial penetration, the placement of the well screen, and anisotropy play insignificant roles in resultant head responses. Recent research is focusing on alternative direct- push (DP) methodologies to determine hydrologic properties. DP offers advantages over traditional well tests, but may yield inaccurate results if the screen becomes clogged during pushing activities. The Kansas Geological Survey (KGS) developed a new DP technique, the Direct-Push Permeameter (DPP), to overcome this limitation. Existing analytical or numerical models cannot address the specialized nature of DPP tests so a second numerical modeling code, the Direct Push Permeameter Simulator (DPSS), was developed. DPPS was generated by modifying STS so both numerical codes are similar in many ways, particularly with their flexibility and accuracy. The codes… Advisors/Committee Members: Esling,Steven.

Subjects/Keywords: groundwater modeling; hydrogeology; well hydraulics

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APA (6^th Edition):

Keller, J. E. (2009). Accurate Cylindrical-Coordinate Numerical Models For The Analysis Of Hydrologic Tests. (Doctoral Dissertation). Southern Illinois University. Retrieved from http://opensiuc.lib.siu.edu/dissertations/57

Chicago Manual of Style (16^th Edition):

Keller, John Edward. “Accurate Cylindrical-Coordinate Numerical Models For The Analysis Of Hydrologic Tests.” 2009. Doctoral Dissertation, Southern Illinois University. Accessed February 18, 2020. http://opensiuc.lib.siu.edu/dissertations/57.

MLA Handbook (7^th Edition):

Keller, John Edward. “Accurate Cylindrical-Coordinate Numerical Models For The Analysis Of Hydrologic Tests.” 2009. Web. 18 Feb 2020.

Vancouver:

Keller JE. Accurate Cylindrical-Coordinate Numerical Models For The Analysis Of Hydrologic Tests. [Internet] [Doctoral dissertation]. Southern Illinois University; 2009. [cited 2020 Feb 18]. Available from: http://opensiuc.lib.siu.edu/dissertations/57.

Council of Science Editors:

Keller JE. Accurate Cylindrical-Coordinate Numerical Models For The Analysis Of Hydrologic Tests. [Doctoral Dissertation]. Southern Illinois University; 2009. Available from: http://opensiuc.lib.siu.edu/dissertations/57

Louisiana State University

20. Kramer, Kody V. Miscible column studies of unfractured and saturated cores of Topopah Spring Tuff from Yucca Mountain, Nevada using hydrophobic organic pollutants.

Degree: MS, Earth Sciences, 2011, Louisiana State University

URL: etd-04252011-233326 ; https://digitalcommons.lsu.edu/gradschool_theses/664

► Miscible displacement column studies were conducted on unfractured cores of Topopah Spring Tuff to quantify transport characteristics of bromide&44; pentafluorobenzoic acid &40;PFBA&41;&44; trichloroethylene &40;TCE&41;&44;… (more)

▼ Miscible displacement column studies were conducted on unfractured cores of Topopah Spring Tuff to quantify transport characteristics of bromide&44; pentafluorobenzoic acid &40;PFBA&41;&44; trichloroethylene &40;TCE&41;&44; and naphthalene. Three 5 cm diameter by 2 cm long cores were flushed with pulses of simulated groundwater containing these tracers&44; followed by tracer&45;free solution. Effective porosities were gravimetrically measured as 11&37;&44; 10.6&37;&44; and 9.5&37;. The tracers achieved full breakthrough in an order correlating to their hydrophobicities. Bromide and PFBA sorbed least&44; achieving full breakthrough in fewer than 10 pore volumes. As water analogues&44; both exhibited no quantifiable sorption. Delay to full breakthrough was contributed to rate&45;limited diffusion into lower permeable regions. Their transport was found to be conservative&44; with their retardation factors computed as 1. TCE reached full breakthrough within 40 to 50 pore volumes and naphthalene at 90 to 100 pore volumes. The tracers desorbed from each core in the same order as the arriving front. Bromide and PFBA fully exited the cores within 10 to 20 pore volumes. TCE and naphthalene exhibited significant tailing during desorption&44; never achieving levels below quantifiable detection due to experimental time constraints. Mass balance calculated recoveries of 95 to 100&37; for bromide&37;PFBA&44; 70 to 90&37; for TCE&44; and 80 to 90&37; for naphthalene. The 1&45;dimensional contaminant transport program CXTFIT determined bromide dispersion between 0.032 to 34.0 cm&178;&37;day. TCE sorption matched the one&45;site sorption model with dispersion values 0.01 to 0.41 cm&178;&37;day. Naphthalene sorption matched a two&45;site model with dispersion values 0.075 to 1.96 cm&178;&37;day. Saturated hydraulic conductivities were measured over the range 8.64E&45;4 to 1.73E&45;2 mm&37;day. Petrographic analysis related core structure to fluid flow. The tuff was welded&44; with 1 mm to 2 cm pumice&44; quartz&44; and feldspars clasts in a fine&45;grained quartz and glass matrix. X&45;ray diffractometry reported major mineralogy &40;excluding 70&37; amorphous glass by volume&41; as quartz 11±5&37;&44; albite 41±5&37;&44; and orthoclase 48±5&37;. The pumices were observed as the primary porosity and likely major flow paths. The disconnectedness of the pumices revealed that the cores would have zones of highly variable permeability&44; moving quickly in the porous pumices and slowly through the tight matrix.

Subjects/Keywords: Yucca Mountain; hydrogeology; Hassler; contaminant

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APA (6^th Edition):

Kramer, K. V. (2011). Miscible column studies of unfractured and saturated cores of Topopah Spring Tuff from Yucca Mountain, Nevada using hydrophobic organic pollutants. (Masters Thesis). Louisiana State University. Retrieved from etd-04252011-233326 ; https://digitalcommons.lsu.edu/gradschool_theses/664

Chicago Manual of Style (16^th Edition):

Kramer, Kody V. “Miscible column studies of unfractured and saturated cores of Topopah Spring Tuff from Yucca Mountain, Nevada using hydrophobic organic pollutants.” 2011. Masters Thesis, Louisiana State University. Accessed February 18, 2020. etd-04252011-233326 ; https://digitalcommons.lsu.edu/gradschool_theses/664.

MLA Handbook (7^th Edition):

Kramer, Kody V. “Miscible column studies of unfractured and saturated cores of Topopah Spring Tuff from Yucca Mountain, Nevada using hydrophobic organic pollutants.” 2011. Web. 18 Feb 2020.

Vancouver:

Kramer KV. Miscible column studies of unfractured and saturated cores of Topopah Spring Tuff from Yucca Mountain, Nevada using hydrophobic organic pollutants. [Internet] [Masters thesis]. Louisiana State University; 2011. [cited 2020 Feb 18]. Available from: etd-04252011-233326 ; https://digitalcommons.lsu.edu/gradschool_theses/664.

Council of Science Editors:

Kramer KV. Miscible column studies of unfractured and saturated cores of Topopah Spring Tuff from Yucca Mountain, Nevada using hydrophobic organic pollutants. [Masters Thesis]. Louisiana State University; 2011. Available from: etd-04252011-233326 ; https://digitalcommons.lsu.edu/gradschool_theses/664

Montana State University

21. Whittingham, John F. Hydrogeology of surficial, unconsolidated quaternary aquifers, Maynard Creek catchment, Bridger Range, Montana.

Degree: College of Letters & Science, 1996, Montana State University

URL: https://scholarworks.montana.edu/xmlui/handle/1/7374

Subjects/Keywords: Aquifers.; Hydrogeology.

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APA (6^th Edition):

Whittingham, J. F. (1996). Hydrogeology of surficial, unconsolidated quaternary aquifers, Maynard Creek catchment, Bridger Range, Montana. (Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/7374

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Whittingham, John F. “Hydrogeology of surficial, unconsolidated quaternary aquifers, Maynard Creek catchment, Bridger Range, Montana.” 1996. Thesis, Montana State University. Accessed February 18, 2020. https://scholarworks.montana.edu/xmlui/handle/1/7374.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Whittingham, John F. “Hydrogeology of surficial, unconsolidated quaternary aquifers, Maynard Creek catchment, Bridger Range, Montana.” 1996. Web. 18 Feb 2020.

Vancouver:

Whittingham JF. Hydrogeology of surficial, unconsolidated quaternary aquifers, Maynard Creek catchment, Bridger Range, Montana. [Internet] [Thesis]. Montana State University; 1996. [cited 2020 Feb 18]. Available from: https://scholarworks.montana.edu/xmlui/handle/1/7374.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Whittingham JF. Hydrogeology of surficial, unconsolidated quaternary aquifers, Maynard Creek catchment, Bridger Range, Montana. [Thesis]. Montana State University; 1996. Available from: https://scholarworks.montana.edu/xmlui/handle/1/7374

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Clemson University

22. Solt Dozier, Rebecca. Examination of Technetium Transport through Soils under Contrasting Redox Conditions.

Degree: MS, Environmental Engineering and Earth Sciences, 2018, Clemson University

URL: https://tigerprints.clemson.edu/all_theses/2951

► Understanding the behaviors of technetium (Tc) during sorption to and desorption from soils amended with titanomagnetite nanoparticles and in redox transition zones is critical for… (more)

▼ Understanding the behaviors of technetium (Tc) during sorption to and desorption from soils amended with titanomagnetite nanoparticles and in redox transition zones is critical for understanding risks from technetium-99 (99Tc) releases into the environment. In this work, experiments were performed under variable redox conditions to evaluate the sorption and desorption behavior of 99Tc in the presence of soil from the Savannah River Site (SRS) and varying concentrations (0.01, 0.1, 1, 10 wt%) of titanomagnetite (Fe3-xTixO4) nanoparticles. Kinetic batch experiments were conducted to investigate how reducing and variable redox conditions and titanomagnetite nanoparticles affect the reduction (sorption) and re-oxidation (desorption) kinetics. There was minimal sorption under oxidizing conditions. Under reducing conditions, there was minimal (<10% sorbed) sorption to solids over 21 days in all percent titanomagnetite systems, except in the 10 wt% titanomagnetite reactors, where there was 50% sorption at 6 hours and 100% sorption at 24 hours. This suggests that reduction of Tc is facilitated by the titanomagnetite nanoparticles above a certain concentration threshold between 1 and 10 wt%. Re-oxidation and desorption of 99Tc occurred relatively rapidly, on the order of hours to days, and the amount of titanomagnetite in the system appeared to have no noticeable effect on the rate of re-oxidation. These findings have important environmental implications about Tc mobility in the environment. It would take Tc weeks to reduce in the subsurface even under reducing conditions, unless there were efficient electron donors, such as titanomagnetite, present in the system. However, it would take relatively short periods of oxidizing conditions for Tc to re-oxidize and become mobile. Experiments were performed under variable redox conditions to evaluate the transport behavior of 99Tc and 99mTc in the presence of soil from the Savannah River Site (SRS) and 1 wt% and 10 wt% titanomagnetite layers. The titanomagnetite was selected for its 99Tc reducing capacity and layer concentrations were selected based on previous batch kinetic work. The experiment was conducted to investigate how redox transitions (reducing to oxidizing conditions) and three concentrations of titanomagnetite nanoparticles (0%, 1%, and 10%) mixed with SRS soil affect the overall mobility of 99Tc and 99mTc as it transitions between mobile Tc(VII) and immobile Tc(IV). A 1D gamma-ray scanner was used to measure 99mTc activity nondestructively within the column and an X-ray computed tomography (CT) imaging system was used to monitor physical processes of NaI transport in situ. These two novel measuring techniques, in addition to measuring fractionated effluent, were used to evaluate the chemical and physical processes of 99Tc and 99mTc transport through the porous media. Tc appeared to behave non-conservatively and became partially and immediately reduced within the column. 1D gamma-ray scanning results revealed 99mTc immobilization in the 1 and 10 wt%… Advisors/Committee Members: Dr. Stephen Moysey, Committee Co-Chair, Dr. Brian Powell, Committee Co-Chair, Dr. Nicole Martinez.

Subjects/Keywords: Geochemistry; Hydrogeology; Technetium; Transport

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APA (6^th Edition):

Solt Dozier, R. (2018). Examination of Technetium Transport through Soils under Contrasting Redox Conditions. (Masters Thesis). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_theses/2951

Chicago Manual of Style (16^th Edition):

Solt Dozier, Rebecca. “Examination of Technetium Transport through Soils under Contrasting Redox Conditions.” 2018. Masters Thesis, Clemson University. Accessed February 18, 2020. https://tigerprints.clemson.edu/all_theses/2951.

MLA Handbook (7^th Edition):

Solt Dozier, Rebecca. “Examination of Technetium Transport through Soils under Contrasting Redox Conditions.” 2018. Web. 18 Feb 2020.

Vancouver:

Solt Dozier R. Examination of Technetium Transport through Soils under Contrasting Redox Conditions. [Internet] [Masters thesis]. Clemson University; 2018. [cited 2020 Feb 18]. Available from: https://tigerprints.clemson.edu/all_theses/2951.

Council of Science Editors:

Solt Dozier R. Examination of Technetium Transport through Soils under Contrasting Redox Conditions. [Masters Thesis]. Clemson University; 2018. Available from: https://tigerprints.clemson.edu/all_theses/2951

Montana State University

23. Dixon, Stewart Alan. Driller specific capacity as a measure of aquifer transmissivity and a test of the hydrogeologic units in the Gallatin Local Water Quality District, Gallatin County, Montana.

Degree: MS, College of Letters & Science, 2002, Montana State University

URL: https://scholarworks.montana.edu/xmlui/handle/1/8227

Subjects/Keywords: Hydrogeology.; Groundwater.

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APA (6^th Edition):

Dixon, S. A. (2002). Driller specific capacity as a measure of aquifer transmissivity and a test of the hydrogeologic units in the Gallatin Local Water Quality District, Gallatin County, Montana. (Masters Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/8227

Chicago Manual of Style (16^th Edition):

Dixon, Stewart Alan. “Driller specific capacity as a measure of aquifer transmissivity and a test of the hydrogeologic units in the Gallatin Local Water Quality District, Gallatin County, Montana.” 2002. Masters Thesis, Montana State University. Accessed February 18, 2020. https://scholarworks.montana.edu/xmlui/handle/1/8227.

MLA Handbook (7^th Edition):

Dixon, Stewart Alan. “Driller specific capacity as a measure of aquifer transmissivity and a test of the hydrogeologic units in the Gallatin Local Water Quality District, Gallatin County, Montana.” 2002. Web. 18 Feb 2020.

Vancouver:

Dixon SA. Driller specific capacity as a measure of aquifer transmissivity and a test of the hydrogeologic units in the Gallatin Local Water Quality District, Gallatin County, Montana. [Internet] [Masters thesis]. Montana State University; 2002. [cited 2020 Feb 18]. Available from: https://scholarworks.montana.edu/xmlui/handle/1/8227.

Council of Science Editors:

Dixon SA. Driller specific capacity as a measure of aquifer transmissivity and a test of the hydrogeologic units in the Gallatin Local Water Quality District, Gallatin County, Montana. [Masters Thesis]. Montana State University; 2002. Available from: https://scholarworks.montana.edu/xmlui/handle/1/8227

University of Connecticut

24. Chlebica, Dariusz. Modifying Borehole Dissolved Oxygen Levels as a Tool in Deciphering Fracture Flow Conditions.

Degree: MS, Geological Sciences, 2013, University of Connecticut

URL: https://opencommons.uconn.edu/gs_theses/390

► This research was undertaken to develop new low-cost methods that use elevated dissolved oxygen (DO) as a means to characterize fracture flow conditions in… (more)

Subjects/Keywords: Hydrogeology; Fractured Bedrock; Borehole Characterization

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APA (6^th Edition):

Chlebica, D. (2013). Modifying Borehole Dissolved Oxygen Levels as a Tool in Deciphering Fracture Flow Conditions. (Masters Thesis). University of Connecticut. Retrieved from https://opencommons.uconn.edu/gs_theses/390

Chicago Manual of Style (16^th Edition):

Chlebica, Dariusz. “Modifying Borehole Dissolved Oxygen Levels as a Tool in Deciphering Fracture Flow Conditions.” 2013. Masters Thesis, University of Connecticut. Accessed February 18, 2020. https://opencommons.uconn.edu/gs_theses/390.

MLA Handbook (7^th Edition):

Chlebica, Dariusz. “Modifying Borehole Dissolved Oxygen Levels as a Tool in Deciphering Fracture Flow Conditions.” 2013. Web. 18 Feb 2020.

Vancouver:

Chlebica D. Modifying Borehole Dissolved Oxygen Levels as a Tool in Deciphering Fracture Flow Conditions. [Internet] [Masters thesis]. University of Connecticut; 2013. [cited 2020 Feb 18]. Available from: https://opencommons.uconn.edu/gs_theses/390.

Council of Science Editors:

Chlebica D. Modifying Borehole Dissolved Oxygen Levels as a Tool in Deciphering Fracture Flow Conditions. [Masters Thesis]. University of Connecticut; 2013. Available from: https://opencommons.uconn.edu/gs_theses/390

25. McBee, William A. Submarine groundwater discharge and hypoxia: lessons learned from an estuary in the semi-arid of South Texas .

Degree: 2017, Texas A&M University – Corpus Christi

URL: http://hdl.handle.net/1969.6/21610

► Formations of hypoxia in Corpus Christi Bay (CCB) and algal blooms in the Upper Laguna Madre have become a concern as they have cyclically surfaced… (more)

▼ Formations of hypoxia in Corpus Christi Bay (CCB) and algal blooms in the Upper Laguna Madre have become a concern as they have cyclically surfaced during the late spring through the fall months. The semi-arid climate of South Texas experiences limited precipitation and surface freshwater inflows, which in turn would point to non-riverine sources such as groundwater as a contributor to the overall nutrient budget. Groundwater has a tendency to accumulate high concentrations of nutrients and organic matter. Despite the potential impact that submarine groundwater discharge (SGD, including groundwater discharge and sediment fluxes) has on estuary systems worldwide, this input has not been well understood. The objective of this study is to use a combination of geophysical and geochemical techniques to enhance the understanding of spatial and temporal occurrence of SGD and related nutrient fluxes and the effects of these inputs on the hypoxia formation in a semiarid estuarine system. Results from multiple continuous electrical resistivity (ER) profiles, spanning from near shore to 2 km offshore, were used to characterize subsurface hydrogeologic heterogeneity and select sampling sites for nutrient and SGD analyses during three seasonal events (winter, summer, and fall). SGD measurements were conducted at three locations using both continuous ER and radon measurements. During summer and late fall, SGD rates show large spatial variances, with the highest average discharge rates measured at the Oso Bay (a secondary bay) inlet (13.1 m3/mˑd), followed by Shamrock Island (2.6 m3/mˑd) and Laguna Madre inlet (1.1 m3/mˑd). On average, SGD rates were higher during late fall (6.5 m3/mˑd) than summer (4.7 m3/mˑd). As a result of higher SGD rates and more enriched nutrient levels in porewater, nutrient fluxes during fall are one order of magnitude higher than summer. Based on the good spatial correlation between dissolved oxygen levels and high 222Rn-derived nutrient fluxes, this study indicates that SGD is not only a significant contributor to the nutrient budget but there is also a possible correlation between these inputs, algal blooms, and hypoxia. Advisors/Committee Members: Murgulet, Dorina (advisor), Wetz, Michael (committeeMember), Murgulet, Valeriu (committeeMember).

Subjects/Keywords: Environmental Science; Geology; Geophysics; Hydrogeology

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APA (6^th Edition):

McBee, W. A. (2017). Submarine groundwater discharge and hypoxia: lessons learned from an estuary in the semi-arid of South Texas . (Thesis). Texas A&M University – Corpus Christi. Retrieved from http://hdl.handle.net/1969.6/21610

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

McBee, William A. “Submarine groundwater discharge and hypoxia: lessons learned from an estuary in the semi-arid of South Texas .” 2017. Thesis, Texas A&M University – Corpus Christi. Accessed February 18, 2020. http://hdl.handle.net/1969.6/21610.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

McBee, William A. “Submarine groundwater discharge and hypoxia: lessons learned from an estuary in the semi-arid of South Texas .” 2017. Web. 18 Feb 2020.

Vancouver:

McBee WA. Submarine groundwater discharge and hypoxia: lessons learned from an estuary in the semi-arid of South Texas . [Internet] [Thesis]. Texas A&M University – Corpus Christi; 2017. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/1969.6/21610.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

McBee WA. Submarine groundwater discharge and hypoxia: lessons learned from an estuary in the semi-arid of South Texas . [Thesis]. Texas A&M University – Corpus Christi; 2017. Available from: http://hdl.handle.net/1969.6/21610

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Boston College

26. Soeller, Christopher Philip. Investigation of the Hydromechanical Effects of Lithostatic Unloading in Open-pit Mines.

Degree: MS, Earth and Environmental Sciences, 2016, Boston College

URL: http://dlib.bc.edu/islandora/object/bc-ir:107281

► The stability of open-pit mine walls and other geotechnical infrastructure is a function of geometry, material properties and groundwater conditions (pore pressure distribution). A portion… (more)

Subjects/Keywords: geotechnical; hydrogeology; mining; pore pressure

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APA (6^th Edition):

Soeller, C. P. (2016). Investigation of the Hydromechanical Effects of Lithostatic Unloading in Open-pit Mines. (Masters Thesis). Boston College. Retrieved from http://dlib.bc.edu/islandora/object/bc-ir:107281

Chicago Manual of Style (16^th Edition):

Soeller, Christopher Philip. “Investigation of the Hydromechanical Effects of Lithostatic Unloading in Open-pit Mines.” 2016. Masters Thesis, Boston College. Accessed February 18, 2020. http://dlib.bc.edu/islandora/object/bc-ir:107281.

MLA Handbook (7^th Edition):

Soeller, Christopher Philip. “Investigation of the Hydromechanical Effects of Lithostatic Unloading in Open-pit Mines.” 2016. Web. 18 Feb 2020.

Vancouver:

Soeller CP. Investigation of the Hydromechanical Effects of Lithostatic Unloading in Open-pit Mines. [Internet] [Masters thesis]. Boston College; 2016. [cited 2020 Feb 18]. Available from: http://dlib.bc.edu/islandora/object/bc-ir:107281.

Council of Science Editors:

Soeller CP. Investigation of the Hydromechanical Effects of Lithostatic Unloading in Open-pit Mines. [Masters Thesis]. Boston College; 2016. Available from: http://dlib.bc.edu/islandora/object/bc-ir:107281

Central Queensland University

27. Mahbub, SM Parvez B. Stochastic disaggregation of daily rainfall for fine timescale design storms.

Degree: 2008, Central Queensland University

URL: http://hdl.cqu.edu.au/10018/19253

Investigates "the use of a stochastic rainfall disaggregation model on a regional basis to disaggregate daily rainfall into any desired fine timescale in the State of Queensland ... required for certain hydrologic modellings such as crop simulation modelling, erosion modelling etc." – Abstract.

Subjects/Keywords: 040603 Hydrogeology

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APA (6^th Edition):

Mahbub, S. P. B. (2008). Stochastic disaggregation of daily rainfall for fine timescale design storms. (Thesis). Central Queensland University. Retrieved from http://hdl.cqu.edu.au/10018/19253

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mahbub, SM Parvez B. “Stochastic disaggregation of daily rainfall for fine timescale design storms.” 2008. Thesis, Central Queensland University. Accessed February 18, 2020. http://hdl.cqu.edu.au/10018/19253.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mahbub, SM Parvez B. “Stochastic disaggregation of daily rainfall for fine timescale design storms.” 2008. Web. 18 Feb 2020.

Vancouver:

Mahbub SPB. Stochastic disaggregation of daily rainfall for fine timescale design storms. [Internet] [Thesis]. Central Queensland University; 2008. [cited 2020 Feb 18]. Available from: http://hdl.cqu.edu.au/10018/19253.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mahbub SPB. Stochastic disaggregation of daily rainfall for fine timescale design storms. [Thesis]. Central Queensland University; 2008. Available from: http://hdl.cqu.edu.au/10018/19253

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Kansas State University

28. Patton, Erik Mark. Modeling vadose zone wells and infiltration basins to compare recharge efficiency in unconfined aquifers.

Degree: MS, Department of Geology, 2017, Kansas State University

URL: http://hdl.handle.net/2097/38217

► In specific lithologic and hydrogeological settings, Managed Aquifer Recharge (MAR) projects using vadose zone wells have the potential to outperform infiltration basins in terms of… (more)

Subjects/Keywords: Hydrogeology; Vadose zone; Modeling

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APA (6^th Edition):

Patton, E. M. (2017). Modeling vadose zone wells and infiltration basins to compare recharge efficiency in unconfined aquifers. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/38217

Chicago Manual of Style (16^th Edition):

Patton, Erik Mark. “Modeling vadose zone wells and infiltration basins to compare recharge efficiency in unconfined aquifers.” 2017. Masters Thesis, Kansas State University. Accessed February 18, 2020. http://hdl.handle.net/2097/38217.

MLA Handbook (7^th Edition):

Patton, Erik Mark. “Modeling vadose zone wells and infiltration basins to compare recharge efficiency in unconfined aquifers.” 2017. Web. 18 Feb 2020.

Vancouver:

Patton EM. Modeling vadose zone wells and infiltration basins to compare recharge efficiency in unconfined aquifers. [Internet] [Masters thesis]. Kansas State University; 2017. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/2097/38217.

Council of Science Editors:

Patton EM. Modeling vadose zone wells and infiltration basins to compare recharge efficiency in unconfined aquifers. [Masters Thesis]. Kansas State University; 2017. Available from: http://hdl.handle.net/2097/38217

University of Waterloo

29. Westberg, Robert Eric. The Use of Temperature and Environmental Isotopes as Tools to Characterize Groundwater Discharge to the Grand River, Ontario, Canada.

Degree: 2013, University of Waterloo

URL: http://hdl.handle.net/10012/7280

► The Grand River Watershed, in southern Ontario, is home to approximately 900,000 people and one of the fastest growing regions in Canada; specifically, in the… (more)

▼ The Grand River Watershed, in southern Ontario, is home to approximately 900,000 people and one of the fastest growing regions in Canada; specifically, in the urban areas of Guelph, Cambridge, Kitchener, and Waterloo. This growth strains the watershed’s capacity to supply adequate water resources to these municipalities, as well as manage the waste-water treatment effluent discharged from them. Nowhere in the watershed is this juxtaposition in water resource function more apparent than at the city of Brantford, with a population of approximately 100,000 people. Located forty-two kilometers downstream from the major urban areas, Brantford is unique in the watershed in that it obtains its entire municipal water supply directly from the Grand River, into which the upstream municipalities discharge 77% of the total waste-water treatment plant effluent emitted to the watershed. One contaminant of concern is nitrate, which, for decades, has been linked to numerous human and aquatic health complications. The input of nitrate from these upstream WWTP’s is considerable; the WWTP’s have a combined flow rate of 2.3 m3s-1, and a mean nitrate concentration of 10.4 mg N·L-1 (data from Anderson, 2012). As a comparison, the Nith River, the largest tributary to the Grand River between Cambridge and Brantford, has a summer baseflow of 2.9 m3s-1 and, from 2000 to 2004, had a mean nitrate concentration of 4.4 mg N·L-1 (Cooke, 2006). Brantford, in addition to treating their water supply, relies on the dilution of in-stream nitrate from groundwater that is thought to discharge along the Grand between Cambridge and the Brantford municipal water intake. This 40-km reach of the Grand River is colloquially referred to as either the discharge reach or the recovery reach. Recent data from various authors indicate that groundwater may not always act to dilute in-stream nitrate from upstream WWTPs (Encalata, 2008; Pastora, 2009; Rosamond 2009). The main objective of the research completed in this thesis was to refine the conceptual model of groundwater/surface water interaction along the Grand River between Cambridge and Brantford. Refinement of this conceptual model was accomplished in two parts. First, groundwater discharge, from bank seepage and direct discharge through the riverbed, was located using a variety of methods; a simple reconnaissance survey by canoe, a FLIR thermography survey, drag probe surveys, and a temperature profiling method. Then domestic wells, seeps, tributaries, riverbed discharge, and WWTP effluent were sampled to geochemically characterize inputs to the Grand River.

Subjects/Keywords: Geochemistry; Hydrology; Isotopes; Hydrogeology

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APA (6^th Edition):

Westberg, R. E. (2013). The Use of Temperature and Environmental Isotopes as Tools to Characterize Groundwater Discharge to the Grand River, Ontario, Canada. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/7280

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Westberg, Robert Eric. “The Use of Temperature and Environmental Isotopes as Tools to Characterize Groundwater Discharge to the Grand River, Ontario, Canada.” 2013. Thesis, University of Waterloo. Accessed February 18, 2020. http://hdl.handle.net/10012/7280.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Westberg, Robert Eric. “The Use of Temperature and Environmental Isotopes as Tools to Characterize Groundwater Discharge to the Grand River, Ontario, Canada.” 2013. Web. 18 Feb 2020.

Vancouver:

Westberg RE. The Use of Temperature and Environmental Isotopes as Tools to Characterize Groundwater Discharge to the Grand River, Ontario, Canada. [Internet] [Thesis]. University of Waterloo; 2013. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/10012/7280.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Westberg RE. The Use of Temperature and Environmental Isotopes as Tools to Characterize Groundwater Discharge to the Grand River, Ontario, Canada. [Thesis]. University of Waterloo; 2013. Available from: http://hdl.handle.net/10012/7280

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waterloo

30. Hoppe, Jutta. Geochemical Characterization and Longevity Estimates of a Permeable Reactive Barrier System Remediating a 90Sr plume.

Degree: 2013, University of Waterloo

URL: http://hdl.handle.net/10012/7293

► In 1998, a permeable reactive barrier system was installed at the Atomic Energy of Canada Ltd. (AECL) Chalk River Laboratories in Chalk River, Ontario, to… (more)

▼ In 1998, a permeable reactive barrier system was installed at the Atomic Energy of Canada Ltd. (AECL) Chalk River Laboratories in Chalk River, Ontario, to prevent the discharge of a 90Sr plume into a nearby swamp. The system known as the “Wall and Curtain” contains clinoptilolite, a zeolite, as a reactive material to sorb 90Sr. The overall objective of this study was to provide refined estimates of the efficiency and longevity of the system. To better understand the flow in the aquifer and through the Wall and Curtain, a detailed physical field characterization of the site was performed. Borehole-dilution tests were performed in 19 mm (¾ inch) drive-point piezometers. The results indicate that the Wall and Curtain system intercepted deeper, contaminated groundwater as intended. Hydraulic conductivities (K) determined through slug tests indicate that the aquifer was relatively homogeneous. Average linear groundwater velocities determined through borehole dilution compared well with velocities determined through the Darcy equation based on slug-test K estimates. The measurements from the field study were used to develop a three dimensional physical flow model. The numerical computer code HydroGeoSphere was used to provide an approximate representation of groundwater flow in the aquifer and through the Wall and Curtain. The model was calibrated by comparing simulated and observed hydraulic head values across the site. The model showed good agreement with the observed heads and acceptable agreement with the field estimates of groundwater velocities. A detailed geochemical characterization of the aquifer and the reactive material, clinoptilolite, was performed through field and laboratory work. Pore-water samples were taken from multiple locations in the aquifer. Solid and pore-water samples from the reactive material were used to determine distribution coefficients for 90Sr and competing cations. Sequential leach tests were performed on small amounts of the radioactive solid samples. Results indicate that the system was highly efficient in treating an average mass flux of > 17,000 Bq/m2day-1. The leading edge of the plume was found to have only reached 40 cm into the 2 m thick Curtain of clinoptilolite after nearly 14 years of operation. The reactive material readily sorbed 90Sr, with a distribution coefficient of > 76,000 mL/g for beta activity. Kinetically controlled ion exchange was the main mechanism of sorption onto the clinoptilolite for most cations. The results indicate that the system was highly efficient. Reactive transport models of the site using two different numerical codes, HydroGeoSphere and MIN3P, were constructed to provide refined estimates of the longevity of the system. The model constructed in HydroGeoSphere included five solutes. Zoned distribution coefficients were specified for the transported solutes. In MIN3P, only the reactive material was used as a model domain. Typical concentrations of the plume were specified. Ion exchange was considered in the simulation, as well as radioactive decay…

Subjects/Keywords: hydrogeology; geochemistry; PRB; 90Sr

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APA (6^th Edition):

Hoppe, J. (2013). Geochemical Characterization and Longevity Estimates of a Permeable Reactive Barrier System Remediating a 90Sr plume. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/7293

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hoppe, Jutta. “Geochemical Characterization and Longevity Estimates of a Permeable Reactive Barrier System Remediating a 90Sr plume.” 2013. Thesis, University of Waterloo. Accessed February 18, 2020. http://hdl.handle.net/10012/7293.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hoppe, Jutta. “Geochemical Characterization and Longevity Estimates of a Permeable Reactive Barrier System Remediating a 90Sr plume.” 2013. Web. 18 Feb 2020.

Vancouver:

Hoppe J. Geochemical Characterization and Longevity Estimates of a Permeable Reactive Barrier System Remediating a 90Sr plume. [Internet] [Thesis]. University of Waterloo; 2013. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/10012/7293.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hoppe J. Geochemical Characterization and Longevity Estimates of a Permeable Reactive Barrier System Remediating a 90Sr plume. [Thesis]. University of Waterloo; 2013. Available from: http://hdl.handle.net/10012/7293

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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Open Access Theses and Dissertations