You searched for subject:(Hydrograph).
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103 total matches.
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University of Edinburgh
1.
Stedham, RL.
Extending Object-Oriented Approaches to Hydrological Modelling based on Triangular Irregular Networks.
Degree: 2011, University of Edinburgh
URL: http://hdl.handle.net/1842/5356 
► This research project aims to further explore an object oriented methodology in which a hydrological system is considered to be a series of interacting hydrological…
(more)
▼ This research project aims to further explore an object oriented methodology in which a hydrological system is considered to be a series of interacting hydrological elements. It will extend Slingsby’s hydrological model TINMOD (2002) whose data structure is based on a TIN with embedded methods and behaviours to build, maintain and derive its topology – as well as derive hydrological information (flow-paths, basins, flow length) about itself. Specifically, this project aims to add functionality to TINMOD that allows it to derive unit hydrographs for mountainous environments where infiltration and interception rates are minimal.
Advisors/Committee Members: Stuart, N, Hulton, N.
Subjects/Keywords: object oriented; TIN; Unit Hydrograph
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APA (6th Edition):
Stedham, R. (2011). Extending Object-Oriented Approaches to Hydrological Modelling based on Triangular Irregular Networks. (Thesis). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/5356
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Stedham, RL. “Extending Object-Oriented Approaches to Hydrological Modelling based on Triangular Irregular Networks.” 2011. Thesis, University of Edinburgh. Accessed January 19, 2021.
http://hdl.handle.net/1842/5356.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Stedham, RL. “Extending Object-Oriented Approaches to Hydrological Modelling based on Triangular Irregular Networks.” 2011. Web. 19 Jan 2021.
Vancouver:
Stedham R. Extending Object-Oriented Approaches to Hydrological Modelling based on Triangular Irregular Networks. [Internet] [Thesis]. University of Edinburgh; 2011. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/1842/5356.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Stedham R. Extending Object-Oriented Approaches to Hydrological Modelling based on Triangular Irregular Networks. [Thesis]. University of Edinburgh; 2011. Available from: http://hdl.handle.net/1842/5356
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of New South Wales
2.
Rancic, Aleksandra.
Reconstruction of bore hydrograph trends in fractured rock aquifers using data minig techniques.
Degree: Civil & Environmental Engineering, 2014, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/53805
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12504/SOURCE02?view=true
► The lack of recorded groundwater hydrographs presents a problem for many ground-water studies. This is especially the case in the areas of fractured rock basement.…
(more)
▼ The lack of recorded groundwater hydrographs presents a problem for many ground-water studies. This is especially the case in the areas of fractured rock basement. In the New South Wales (NSW) portion of the Murray-Darling Basin (MDB), Australia, long-term
hydrograph trends were required to separate groundwater components of climate forcing from the effects of deforestation on groundwater rise. To overcome the problem of missing long-term hydrographs, the data-mining technique was developed to enable reconstruction of aquifer behaviour from independent point data acquired at different times.The multi-decadal descriptive data-mining methodology described here uses independent Standing Water Level data (SWL – depth to water table), recorded in the groundwater database after borehole construction. Data are restricted to the Palaeozoic and early Mesozoic fractured rock aquifers closest to the land-surface.Catchments with pronounced rainfall gradients are divided to preserve homogeneity and avoid spatial-temporal confounding. Annual SWL time-series are created using a median function. The noise is filtered by applying 21-year moving average. The methodology is demonstrated on the Namoi Catchment. Results are validated using existing short-term hydrographs and long-term proxy datasets: rainfall trends.Evaluation is assessed using Root Mean Square Error method. It was validated on the Lachlan and Murrumbidgee catchments, where historic hydrographs exist. The approach described here has been successful in recreating past multi-decadal groundwater level trends in the fractured rock areas in eastern NSW. Aquifers rapidly responded to wetter climatic conditions and equilibrated within two to seventeen years. The influences of changes in land-use were detected in the Lachlan West section, where wheat-growing replaced pastoralism, and was separated fromclimatic drivers. Everywhere else the climate was the main driver of groundwater rise and was directly implicated in triggering dryland salinity. This observation helps clarify the mechanisms of dryland salinity occurrence.The methodology for reconstruction of aquifer behaviour has obvious applicability in many other parts of the world where only basic bore completion data exist,but long-term monitoring has not been carried out. In particular it can be applied to the basement areas in Africa, Australia and India.
Advisors/Committee Members: Acworth, Ian, Water Research Laboratory, Faculty of Engineering, UNSW.
Subjects/Keywords: Data-mining; Groundwater; Hydrograph reconstruction
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APA (6th Edition):
Rancic, A. (2014). Reconstruction of bore hydrograph trends in fractured rock aquifers using data minig techniques. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/53805 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12504/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Rancic, Aleksandra. “Reconstruction of bore hydrograph trends in fractured rock aquifers using data minig techniques.” 2014. Doctoral Dissertation, University of New South Wales. Accessed January 19, 2021.
http://handle.unsw.edu.au/1959.4/53805 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12504/SOURCE02?view=true.
MLA Handbook (7th Edition):
Rancic, Aleksandra. “Reconstruction of bore hydrograph trends in fractured rock aquifers using data minig techniques.” 2014. Web. 19 Jan 2021.
Vancouver:
Rancic A. Reconstruction of bore hydrograph trends in fractured rock aquifers using data minig techniques. [Internet] [Doctoral dissertation]. University of New South Wales; 2014. [cited 2021 Jan 19].
Available from: http://handle.unsw.edu.au/1959.4/53805 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12504/SOURCE02?view=true.
Council of Science Editors:
Rancic A. Reconstruction of bore hydrograph trends in fractured rock aquifers using data minig techniques. [Doctoral Dissertation]. University of New South Wales; 2014. Available from: http://handle.unsw.edu.au/1959.4/53805 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12504/SOURCE02?view=true
University of Edinburgh
3.
Kute, Abhijeet.
Predicting GIS-Based Spatially Distributed Unit-Hydrograph from Urban Development Scenarios.
Degree: 2007, University of Edinburgh
URL: http://hdl.handle.net/1842/1886
► Spatially distributed Unit-Hydrograph model is implemented using a Geographical Information System (GIS) in this study to investigate the effects of how increasing impervious areas may…
(more)
▼ Spatially distributed Unit-
Hydrograph model is implemented using a Geographical Information System (GIS) in this study to investigate the effects of how increasing impervious areas may influence surface runoff in urban areas. A distributed velocity grid is developed from a 10m Digital elevation model (DEM) using the kinematic wave approximation and Manning’s equation. By estimating the cumulative travel time across each cell in the catchment along the each flow path a time- area histogram is developed to derive one-hour Unit-
Hydrograph. The method is implemented using ArcGIS 9.1 software and used to study the effect of continuously increasing impervious area from 1996 to 2006 for a small Calais Burn catchment in Fife council area. The historical Unit-Hydrographs developed for each of the seven years show that the increase of 11 % in impervious area has increased the peak discharge of the draining area by 35% and has decreased the time to peak by one hour.
Advisors/Committee Members: Neil, Stuart.
Subjects/Keywords: Unit-Hydrograph; Watershed delineation; Digital elevation model
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APA (6th Edition):
Kute, A. (2007). Predicting GIS-Based Spatially Distributed Unit-Hydrograph from Urban Development Scenarios. (Thesis). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/1886
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kute, Abhijeet. “Predicting GIS-Based Spatially Distributed Unit-Hydrograph from Urban Development Scenarios.” 2007. Thesis, University of Edinburgh. Accessed January 19, 2021.
http://hdl.handle.net/1842/1886.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kute, Abhijeet. “Predicting GIS-Based Spatially Distributed Unit-Hydrograph from Urban Development Scenarios.” 2007. Web. 19 Jan 2021.
Vancouver:
Kute A. Predicting GIS-Based Spatially Distributed Unit-Hydrograph from Urban Development Scenarios. [Internet] [Thesis]. University of Edinburgh; 2007. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/1842/1886.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kute A. Predicting GIS-Based Spatially Distributed Unit-Hydrograph from Urban Development Scenarios. [Thesis]. University of Edinburgh; 2007. Available from: http://hdl.handle.net/1842/1886
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Alberta
4.
Wagner, Michael Johann.
Hydrologic risk assessment framework for Alberta's green
zone.
Degree: MS, Department of Renewable Resources, 2010, University of Alberta
URL: https://era.library.ualberta.ca/files/kp78gg70s
► In this dissertation, a hydrologic classification approach was tested using the shape factor of hydrographs to represent variation in streamflow regimes across Alberta. Hydrograph shape…
(more)
▼ In this dissertation, a hydrologic classification
approach was tested using the shape factor of hydrographs to
represent variation in streamflow regimes across Alberta.
Hydrograph shape factor was effective at separating the forested
landbase into 6 spatially distinct regions. Further statistical
analysis of hydrometric data showed each region to have unique
streamflow characteristics. Differences in physiography between
regions were evident and strong associations were found between
physical catchment characteristics and hydrologic variables
describing streamflow magnitude and timing. In a case study,
findings were used to define the regional natural range of
hydrologic variation and applied into a watershed assessment tool
evaluating the potential changes to streamflow regimes as a result
of forest disturbance. This analysis showed that because of
hydrologic variability among regions, spatial variation in
sensitivity to harvest likely exists within the forested landbase,
highlighting the need for development of regional criteria and
indicators for sustainable management of water
resources.
Subjects/Keywords: Streamflow; Variability; Hydrologic regime; Classification; Annual Hydrograph
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APA (6th Edition):
Wagner, M. J. (2010). Hydrologic risk assessment framework for Alberta's green
zone. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/kp78gg70s
Chicago Manual of Style (16th Edition):
Wagner, Michael Johann. “Hydrologic risk assessment framework for Alberta's green
zone.” 2010. Masters Thesis, University of Alberta. Accessed January 19, 2021.
https://era.library.ualberta.ca/files/kp78gg70s.
MLA Handbook (7th Edition):
Wagner, Michael Johann. “Hydrologic risk assessment framework for Alberta's green
zone.” 2010. Web. 19 Jan 2021.
Vancouver:
Wagner MJ. Hydrologic risk assessment framework for Alberta's green
zone. [Internet] [Masters thesis]. University of Alberta; 2010. [cited 2021 Jan 19].
Available from: https://era.library.ualberta.ca/files/kp78gg70s.
Council of Science Editors:
Wagner MJ. Hydrologic risk assessment framework for Alberta's green
zone. [Masters Thesis]. University of Alberta; 2010. Available from: https://era.library.ualberta.ca/files/kp78gg70s
Universidade Federal de Viçosa
5.
Antônio Calazans Reis Miranda.
Métodos de separação dos escoamentos superficial direto e subterrâneo: estudo de caso para a bacia do Rio das Velhas.
Degree: 2012, Universidade Federal de Viçosa
URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4391
► The separation of direct runoff from baseflow gives an understanding of the magnitude and dynamics of groundwater and direct runoff in watersheds. It also allows…
(more)
▼ The separation of direct runoff from baseflow gives an understanding of the magnitude and dynamics of groundwater and direct runoff in watersheds. It also allows the analysis of the influence of factors, such as conservation practices, or soil sealing by urbanization process, on baseflow and direct runoff. Given the importance of studies on direct runoff and baseflow, this work had the folowing purposes: to analyze the performance of the direct runoff from baseflow separation methods; to analyze the influence of sealing caused by the Belo Horizonte metropolitan region (RMBH) in direct runoff into a Rio das Velhas watershed; and to develop a software for application of separation methods. The performance analysis was made with the comparison between the volumes of direct runoff considering daily values and annual total estimated by the separation methods: fixed interval, sliding interval and local minimum. The analysis of the influence of the sealing of the basin caused by RMBH was made by comparing the total runoff coefficients, the direct surface runoff indexes, and the direct runoff coefficients, estimated for one watershed without the RMBH influence, and another watershed that is under the RMBH influence. The software was developed in VBA, with interface designed in Microsoft Office Excel. The results indicate that the three separation methods analysed gives similar results into estimate daily direct runoff and annual total direct runoff. The RMBH has significant influence on the amount of direct runoff generated in the Rio das Velhas watershed considered. The developed computer system allows the practical and objective application of the three separation methods fixed interval, sliding interval and local minimum and the obtaining of annual precipitation, for databases available on the HidroWeb system, of ANA.
A separação do escoamento superficial direto do escoamento subterrâneo permite a compreensão da magnitude e da dinâmica das águas subterrâneas e do escoamento superficial direto em bacias hidrográficas. Permite também a análise da influência sobre o escoamento subterrâneo e sobre o escoamento superficial direto de fatores, como a adoção de práticas conservacionistas, ou a impermeabilização do solo pelo processo de urbanização. Diante da importância dos estudos sobre o escoamento superficial direto e o escoamento subterrâneo, este trabalho teve os seguintes objetivos: analisar o desempenho de métodos de separação do escoamento superficial direto do escoamento subterrâneo; analisar a influência da impermeabilização provocada pela Região Metropolitana de Belo Horizonte (RMBH) no escoamento superficial direto em uma sub-bacia do Rio das Velhas; e desenvolver um sistema computacional para a aplicação dos métodos de separação. A análise do desempenho foi feita com a comparação entre os volumes de escoamento superficial direto considerando os valores diários e os totais anuais estimados pelos métodos de separação: intervalo fixo, intervalo móvel e mínimo local. A análise da influência da impermeabilização da…
Advisors/Committee Members: Paulo Roberto Cecon, Mauro Aparecido Martinez, João Batista Lopes da Silva, Fernando Falco Pruski, Nori Paulo Griebeler, Juliana Cristina Braga.
Subjects/Keywords: Hidrograma; Vazão; ENGENHARIA AGRICOLA; Hydrograph; Output
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APA (6th Edition):
Miranda, A. C. R. (2012). Métodos de separação dos escoamentos superficial direto e subterrâneo: estudo de caso para a bacia do Rio das Velhas. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4391
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Miranda, Antônio Calazans Reis. “Métodos de separação dos escoamentos superficial direto e subterrâneo: estudo de caso para a bacia do Rio das Velhas.” 2012. Thesis, Universidade Federal de Viçosa. Accessed January 19, 2021.
http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4391.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Miranda, Antônio Calazans Reis. “Métodos de separação dos escoamentos superficial direto e subterrâneo: estudo de caso para a bacia do Rio das Velhas.” 2012. Web. 19 Jan 2021.
Vancouver:
Miranda ACR. Métodos de separação dos escoamentos superficial direto e subterrâneo: estudo de caso para a bacia do Rio das Velhas. [Internet] [Thesis]. Universidade Federal de Viçosa; 2012. [cited 2021 Jan 19].
Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4391.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Miranda ACR. Métodos de separação dos escoamentos superficial direto e subterrâneo: estudo de caso para a bacia do Rio das Velhas. [Thesis]. Universidade Federal de Viçosa; 2012. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4391
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
McMaster University
6.
Tang, Weigang.
An automated toolkit for hyetograph-hydrograph analysis.
Degree: MSc, 2014, McMaster University
URL: http://hdl.handle.net/11375/16443
► Understanding the nature of streamflow response to precipitation inputs is at the core of applied hydrological applications such as flood forecasting and water resource management.…
(more)
▼ Understanding the nature of streamflow response to precipitation inputs is at the core of applied hydrological applications such as flood forecasting and water resource management. Indices such as the runoff ratio, recession constant and response time of a watershed retain an important place in hydrology decades after their establishment as metrics to compare watersheds and understand the impact of human activity, geology, geomorphology, soils and climate on precipitation-runoff relations. Extracting characteristics of the hyetograph-hydrograph relationship is often done manually, resulting in subjective and inconsistent results that require considerable time. In addition, there are a large number of metrics proposed to analyze the hyetograph-hydrograph relationship and hydrograph shape that are typically subjective in application. The objective of this research is to develop an automated and flexible toolkit for rainfall-runoff analysis. Using the MATLAB language, a series of inter-related functions are created to extract rainfall-runoff events from time-series of rainfall and streamflow data and compute commonly used characteristics of the hyetograph-hydrograph relationship. Furthermore, a number of input parameters are introduced to add flexibility to the toolkit. This toolkit has been applied successfully to four watersheds in Canada and Scotland. A subsequent analysis was performed assessing the sensitivity of parameter selection on the toolkit performance, and a number of suggestions for users provided. It is anticipated that this toolkit will provide hydrologists with a rapid objective method of analyzing rainfall and runoff data where in the past manual procedures resulted in considerable subjectivity in results.
Thesis
Master of Science (MSc)
Advisors/Committee Members: Carey, Sean, Geography.
Subjects/Keywords: hydrograph analysis; hyetograph; time characteristics; recession analysis
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APA (6th Edition):
Tang, W. (2014). An automated toolkit for hyetograph-hydrograph analysis. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/16443
Chicago Manual of Style (16th Edition):
Tang, Weigang. “An automated toolkit for hyetograph-hydrograph analysis.” 2014. Masters Thesis, McMaster University. Accessed January 19, 2021.
http://hdl.handle.net/11375/16443.
MLA Handbook (7th Edition):
Tang, Weigang. “An automated toolkit for hyetograph-hydrograph analysis.” 2014. Web. 19 Jan 2021.
Vancouver:
Tang W. An automated toolkit for hyetograph-hydrograph analysis. [Internet] [Masters thesis]. McMaster University; 2014. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/11375/16443.
Council of Science Editors:
Tang W. An automated toolkit for hyetograph-hydrograph analysis. [Masters Thesis]. McMaster University; 2014. Available from: http://hdl.handle.net/11375/16443
University of Newcastle
7.
Senevirathne, Nalin.
A screening method for rural flash flooding risk assessment.
Degree: PhD, 2015, University of Newcastle
URL: http://hdl.handle.net/1959.13/1313488
► Research Doctorate - Doctor of Philosophy (PhD)
Flash flooding is considered as one of the most disastrous natural hazards, which has had significant impact on…
(more)
▼ Research Doctorate - Doctor of Philosophy (PhD)
Flash flooding is considered as one of the most disastrous natural hazards, which has had significant impact on human, infrastructure and environment throughout history. By definition, flash flooding occurs within a very short time (usually few hours) of the beginning of rainfall, which results in a limited time frame to issue warnings or prepare for evacuation. Risk assessment can be done using a hydrological model. However, most models require catchment specific data and take considerable execution time. Modelling techniques and the understanding of flash flooding are getting improved with the availability of better quality data such as high resolution Digital Elevation Models (DEM). DEMs allow the automated characterization of the influence of geomorphology on the hydrologic response of catchments. They are particularly useful for small ungauged catchments where available hydrologic data (e.g. rainfall, runoff) are sparse and where site specific studies are rarely done unless some evidence of high risk is available. This research presents new relationships between catchment hydrologic response and instantaneous unit hydrograph (IUH), which led to derive risk indicators that can be used to identify flash flooding risk areas within catchments. New measures are related to the rate of rise of the hydrograph and the catchment response time. Standard terrain analysis methods (pit filling, flow direction, local slope, contributing area, flow velocity and travel time) were used to produce time-area diagram and subsequently IUH, which was calculated for every individual pixel in the catchment. When computing the IUHs, each pixel was considered as the outlet of its own catchment bounded by its contributing area. This allows presenting the hydrological response and risk areas at the finest scale possible for a DEM. To perform this analysis, a fully distributed hydrological model was developed using Python programming language. The model is quite computationally efficient and can be completely automated. The study area includes 37 major river basins covering a 1700km long by 50km wide coastal strip of Eastern Australia. The analysis was done using a high resolution (1 arc second) DEM. Two types of output maps were produced; 1) flash flood risk areas at catchment scale, 2) spatial distribution of hydrologic response within catchments (e.g. high and low responsive areas). Moreover, results were validated using the data of severe flash flooding that occurred around Toowoomba (at the northern end of the coastal strip studied) in January 2011.
Advisors/Committee Members: University of Newcastle. Faculty of Engineering & Built Environment, School of Engineering.
Subjects/Keywords: flash flooding; instantaneous unit hydrograph; risk assessment; hydrological modelling
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APA (6th Edition):
Senevirathne, N. (2015). A screening method for rural flash flooding risk assessment. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/1313488
Chicago Manual of Style (16th Edition):
Senevirathne, Nalin. “A screening method for rural flash flooding risk assessment.” 2015. Doctoral Dissertation, University of Newcastle. Accessed January 19, 2021.
http://hdl.handle.net/1959.13/1313488.
MLA Handbook (7th Edition):
Senevirathne, Nalin. “A screening method for rural flash flooding risk assessment.” 2015. Web. 19 Jan 2021.
Vancouver:
Senevirathne N. A screening method for rural flash flooding risk assessment. [Internet] [Doctoral dissertation]. University of Newcastle; 2015. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/1959.13/1313488.
Council of Science Editors:
Senevirathne N. A screening method for rural flash flooding risk assessment. [Doctoral Dissertation]. University of Newcastle; 2015. Available from: http://hdl.handle.net/1959.13/1313488
Mississippi State University
8.
Killian, Courtney.
Surface-water and groundwater interactions of a stream reach and proposed reservoir within the Pascagoula River Basin: George County, Mississippi.
Degree: MS, Geosciences, 2015, Mississippi State University
URL: http://sun.library.msstate.edu/ETD-db/theses/available/etd-03272015-152444/
;
► This research had two main objectives: quantify surface-water and groundwater interactions along a stream reach, and determine the hydraulic conductivity at the site where…
(more)
▼ This research had two main objectives: quantify surface-water and groundwater interactions along a stream reach, and determine the hydraulic conductivity at the site where two reservoirs are proposed. The objectives of this research aim to help maintain stream ecology and increase surface water storage for recreational and industrial purposes. The stream reach, located in the Pascagoula River Basin of southeast Mississippi, begins at Lake Okatibbee and terminates at Pascagoula into the Gulf of Mexico. Four USGS continuous gauging stations provided more than forty years of stream discharge data for a
hydrograph base-flow-recession analysis, which determined the baseflow component within the stream. The analysis showed that baseflow decreases along the stream reach and increases again before reaching the Gulf of Mexico. Thirteen borehole samples were collected at the sites of the proposed reservoirs in George County, Mississippi to determine the hydraulic conductivity of the sediments, which showed high a hydraulic conductivity.
Advisors/Committee Members: Darrel W. Schmitz (chair), John C. Rodgers III (committee member), Adam Skarke (committee member).
Subjects/Keywords: grain-size analysis; baseflow; hydrograph; groundwater; surface-water
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APA ·
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APA (6th Edition):
Killian, C. (2015). Surface-water and groundwater interactions of a stream reach and proposed reservoir within the Pascagoula River Basin: George County, Mississippi. (Masters Thesis). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-03272015-152444/ ;
Chicago Manual of Style (16th Edition):
Killian, Courtney. “Surface-water and groundwater interactions of a stream reach and proposed reservoir within the Pascagoula River Basin: George County, Mississippi.” 2015. Masters Thesis, Mississippi State University. Accessed January 19, 2021.
http://sun.library.msstate.edu/ETD-db/theses/available/etd-03272015-152444/ ;.
MLA Handbook (7th Edition):
Killian, Courtney. “Surface-water and groundwater interactions of a stream reach and proposed reservoir within the Pascagoula River Basin: George County, Mississippi.” 2015. Web. 19 Jan 2021.
Vancouver:
Killian C. Surface-water and groundwater interactions of a stream reach and proposed reservoir within the Pascagoula River Basin: George County, Mississippi. [Internet] [Masters thesis]. Mississippi State University; 2015. [cited 2021 Jan 19].
Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-03272015-152444/ ;.
Council of Science Editors:
Killian C. Surface-water and groundwater interactions of a stream reach and proposed reservoir within the Pascagoula River Basin: George County, Mississippi. [Masters Thesis]. Mississippi State University; 2015. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-03272015-152444/ ;
9.
Lapp, Anthony.
Seasonal Variability of Groundwater Contribution to Watershed Discharge in Discontinuous Permafrost in the North Klondike River Valley, Yukon
.
Degree: 2015, University of Ottawa
URL: http://hdl.handle.net/10393/32298
► The objectives of this thesis were: (1) to quantify seasonal groundwater contribution to total stream discharge and (2) further our understanding of sub-arctic carbon sources…
(more)
▼ The objectives of this thesis were: (1) to quantify seasonal groundwater contribution to total stream discharge and (2) further our understanding of sub-arctic carbon sources and pathways within a sub-arctic discontinuous permafrost river catchment. Twenty-two samples were taken from the North Klondike River, 14 samples from 5 of its tributaries, and 46 rain and snowmelt samples from the Dawson City Airport, Yukon, Canada,. During the winter months, groundwater is responsible for greater than 95% of total river discharge. Spring freshet and summer flow bring snowmelt and precipitation, contributing anywhere from 30% to greater than 60% of total river discharge. Groundwater is characterised by high concentrations of geogenic solutes from weathering during recharge, dissolved inorganic carbon, and carbon-14 activities of 0.61 pMC. Tritium activities indicate a fast moving system, with groundwater ages measuring less than 10 years. The most significant discharge of organic carbon from the system is during spring freshet (434,192 kg carbon). Primary productivity within the system is estimated to be 10.2 grams of carbon per metre squared, with approximately 96% of carbon being sequestered or emitted as carbon dioxide.
Subjects/Keywords: Groundwater;
Permafrost;
Hydrograph seperation
…discharge is the use of isotope
hydrograph separation. This is a mass balance approach to separate… …Clark and Fritz, 1997).
Since the advent of isotope hydrograph separation, there has been… …an increase in hydrograph
separation applications in new hydrologic areas, such as… …permafrost terrain.
Historically,
hydrograph separation has been limited to catchments located in… …hydrograph of the river and quantifying seasonal groundwater discharge.
There have been a number of…
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APA (6th Edition):
Lapp, A. (2015). Seasonal Variability of Groundwater Contribution to Watershed Discharge in Discontinuous Permafrost in the North Klondike River Valley, Yukon
. (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/32298
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lapp, Anthony. “Seasonal Variability of Groundwater Contribution to Watershed Discharge in Discontinuous Permafrost in the North Klondike River Valley, Yukon
.” 2015. Thesis, University of Ottawa. Accessed January 19, 2021.
http://hdl.handle.net/10393/32298.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lapp, Anthony. “Seasonal Variability of Groundwater Contribution to Watershed Discharge in Discontinuous Permafrost in the North Klondike River Valley, Yukon
.” 2015. Web. 19 Jan 2021.
Vancouver:
Lapp A. Seasonal Variability of Groundwater Contribution to Watershed Discharge in Discontinuous Permafrost in the North Klondike River Valley, Yukon
. [Internet] [Thesis]. University of Ottawa; 2015. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/10393/32298.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lapp A. Seasonal Variability of Groundwater Contribution to Watershed Discharge in Discontinuous Permafrost in the North Klondike River Valley, Yukon
. [Thesis]. University of Ottawa; 2015. Available from: http://hdl.handle.net/10393/32298
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Waterloo
10.
Thompson, Peter John.
Event Based Characterization of Hydrologic Change in Urbanizing Southern Ontario Watersheds via High Resolution Stream Gauge Data.
Degree: 2013, University of Waterloo
URL: http://hdl.handle.net/10012/7395
► Tracking and quantifying hydrologic change in urbanizing watersheds is a complex problem which can vary spatially and temporally throughout the effective catchment area as change…
(more)
▼ Tracking and quantifying hydrologic change in urbanizing watersheds is a complex problem which can vary spatially and temporally throughout the effective catchment area as change occurs. Hydromodification due to urbanization usually results in a larger peak event stream discharge, a change in typical event volume, a reduced lag time between rainfall and stream discharge events, and a more complex falling hydrograph. Recently extracted Environment Canada data have allowed the creation of a high resolution instantaneous stream flow dataset dating to the late 1960s for many Ontario gauge stations. Hydrometric data were obtained for fifteen urban and semi-urban catchments within Southern Ontario ranging in size from ~50km² to 300 km² with urbanized land use assemblages varying from <5% to 80%. Utilizing automated methods, each individual runoff event from the hydrographic record was identified and characterized. Temporal changes to urban land area, land use, and road length were quantified for each watershed from aerial photography spanning the period of record at approximately 8 year intervals allowing identified trends in event hydrograph parameters to be correlated quantitatively with the alteration of the catchment over time.
Increasing trends in event peak discharge were identified in all but one study catchment. Event volume was found to be consistently increasing in most of the urban watershed, while trends in event duration were observed but with no clear increasing or decreasing trend. The lack of consistent trends in the timing and distribution of flow during runoff events suggest that build-out, drainage network design, and stormwater management systems play differing roles in the neighbouring urban catchments. Changes to flood recurrence intervals through the period of urbanization were also investigated; peak magnitude of high frequency events is affected to a greater extent than low frequency or flood events. The relative change in return frequency distribution is not consistent between catchments, also the degree of alteration can differ between various recurrence intervals at a gauge. Peak discharge of some return periods appeared to decrease with urban development suggesting that the increased detention brought with urban stormwater management systems have effectively offset the increased runoff due to additional impervious area and improved drainage efficiency. A consistent relationship defining the change in geomorphically significant return periods (i.e. channel forming flow) with urbanization was identified in neighbouring urban catchments.
Subjects/Keywords: hydrology; urban hydrology; urbanization; frequency analysis; hydrological alteration; hydrograph analysis
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APA (6th Edition):
Thompson, P. J. (2013). Event Based Characterization of Hydrologic Change in Urbanizing Southern Ontario Watersheds via High Resolution Stream Gauge Data. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/7395
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Thompson, Peter John. “Event Based Characterization of Hydrologic Change in Urbanizing Southern Ontario Watersheds via High Resolution Stream Gauge Data.” 2013. Thesis, University of Waterloo. Accessed January 19, 2021.
http://hdl.handle.net/10012/7395.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Thompson, Peter John. “Event Based Characterization of Hydrologic Change in Urbanizing Southern Ontario Watersheds via High Resolution Stream Gauge Data.” 2013. Web. 19 Jan 2021.
Vancouver:
Thompson PJ. Event Based Characterization of Hydrologic Change in Urbanizing Southern Ontario Watersheds via High Resolution Stream Gauge Data. [Internet] [Thesis]. University of Waterloo; 2013. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/10012/7395.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Thompson PJ. Event Based Characterization of Hydrologic Change in Urbanizing Southern Ontario Watersheds via High Resolution Stream Gauge Data. [Thesis]. University of Waterloo; 2013. Available from: http://hdl.handle.net/10012/7395
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Addis Ababa University
11.
Tsehaye, Zeray.
APPLICATION OF THE GEOMORPHOLOGIC INSTANTANEOUS UNIT HYDROGRAPH CONCEPT FOR RUNOFF PREDICTION IN UNGAUGED CATCHMENTS
.
Degree: 2012, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/4349
► This study was aimed at development of unit hydrograph by relating the geomorphological characteristics of a catchment with the basic characteristics of the catchment IUH…
(more)
▼ This study was aimed at development of unit
hydrograph by relating the geomorphological characteristics of a catchment with the basic characteristics of the catchment IUH through the concept of Geomorphological Instantaneous Unit
Hydrograph (GIUH) to address the problem of predictions in ungauged catchments. Two conceptual unit
hydrograph models, ED-GIUH model and the GIUH based Nash model, have been used in the study. The geomorphological characteristics including the Horton‘s ratios of the catchments were extracted using GIS software called ILWIS. DEM-hydro processing, a new routine developed in ILWIS, was used for the extraction of the geomorphological characteristics. The geomorphological characteristics of a catchment were related with the shape and scale parameters of the Nash IUH to derive the complete shape of the GIUH based Nash model. ED-GIUH was developed from geomorphological characteristics of the catchments and probability density function of travel time of rain fall excess to the catchment outlet. These two models were developed in four catchments in Abay basin with range of areas (185-670km2). The velocity parameter of the two models was calibrated using unit
hydrograph ordinates developed through rainfall-runoff analysis and the optimum velocity was determined. The performances of the calibrated models were evaluated using error functions, namely, Nash-Sutcliffe efficiency (NSE), percentage error in peak discharge (PEP), and percentage error in time to peak (PETP) and the models were compared together with the observed average unit hydrographs. From the results of the calibration as well as verification of the models it was found that both models were adequately simulate the shape of the unit hydrographs of the catchments. The ED-GIUH was successful in capturing the peak discharge of the hydrographs but the Nash based GIUH model was better in simulating the time to peak as well as the shape of the unit hydrographs.
The optimized velocity parameter of ED-GIUH model was related to the geomorphologic characteristics of the catchments. The linear equation, relating the velocity with the slope and longest flow path of the catchments under the study was found to be best fit. A validation test was carried out to check the reliability of the derived equation in an adjacent catchment
which was not used in the calibration of the models and a reasonable result was obtained in four rainfall-runoff events. Finally, it is clear that the predictability of the developed velocity equation in the region will be improved if the number catchments included in the calibration of the models were increased. Key words: Geomorphological instantaneous unit
hydrograph, ungauged catchments, GIS, Nash model, rainfall-runoff modeling.
Advisors/Committee Members: Dr. Semu Ayalew (advisor).
Subjects/Keywords: Geomorphological instantaneous unit hydrograph;
ungauged catchments;
GIS;
Nash model
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APA (6th Edition):
Tsehaye, Z. (2012). APPLICATION OF THE GEOMORPHOLOGIC INSTANTANEOUS UNIT HYDROGRAPH CONCEPT FOR RUNOFF PREDICTION IN UNGAUGED CATCHMENTS
. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/4349
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tsehaye, Zeray. “APPLICATION OF THE GEOMORPHOLOGIC INSTANTANEOUS UNIT HYDROGRAPH CONCEPT FOR RUNOFF PREDICTION IN UNGAUGED CATCHMENTS
.” 2012. Thesis, Addis Ababa University. Accessed January 19, 2021.
http://etd.aau.edu.et/dspace/handle/123456789/4349.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tsehaye, Zeray. “APPLICATION OF THE GEOMORPHOLOGIC INSTANTANEOUS UNIT HYDROGRAPH CONCEPT FOR RUNOFF PREDICTION IN UNGAUGED CATCHMENTS
.” 2012. Web. 19 Jan 2021.
Vancouver:
Tsehaye Z. APPLICATION OF THE GEOMORPHOLOGIC INSTANTANEOUS UNIT HYDROGRAPH CONCEPT FOR RUNOFF PREDICTION IN UNGAUGED CATCHMENTS
. [Internet] [Thesis]. Addis Ababa University; 2012. [cited 2021 Jan 19].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/4349.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tsehaye Z. APPLICATION OF THE GEOMORPHOLOGIC INSTANTANEOUS UNIT HYDROGRAPH CONCEPT FOR RUNOFF PREDICTION IN UNGAUGED CATCHMENTS
. [Thesis]. Addis Ababa University; 2012. Available from: http://etd.aau.edu.et/dspace/handle/123456789/4349
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Newcastle
12.
Vahidi, Elham.
Response of pool-riffle dynamics to changes in sediment supply and flow hydrographs.
Degree: PhD, 2019, University of Newcastle
URL: http://hdl.handle.net/1959.13/1407952
► Research Doctorate - Doctor of Philosophy (PhD)
The interaction of alterations in sediment supply, hydrographs and channel geometry can affect, on a mesoscale, geomorphic features…
(more)
▼ Research Doctorate - Doctor of Philosophy (PhD)
The interaction of alterations in sediment supply, hydrographs and channel geometry can affect, on a mesoscale, geomorphic features like pools and riffles. A pool-riffle sequence is a stable geomorphological feature naturally found in rivers that provides essential habitat areas for aquatic organisms. Due to their ecological benefits, understanding how habitat conditions might change in the future and how they respond and adjust to disturbances such as an altered sedimentological regime is vital for river management and rehabilitation. Previous research has mainly investigated the effect of bed non-uniformity, hydrographs or sediment supply on pool-riffle morphology under equilibrium sediment transport conditions, while little work has been done to investigate the effect of hydrographs (e.g. magnitude and duration) in combination with alteration of sediment supply and non-equilibrium sediment transport conditions on the long-term stability of pool-riffle features. So far, there has been limited experimental study about pool-riffle maintenance that has considered the simultaneous effect of different sediment supply rate during variable flows, and none has included spatial and temporal measurement of flow parameters, bed level variations and sediment size distributions under non-equilibrium condition. The goal of this thesis is to understand the relative effect of alteration of sediment supply and bed geometry, coupled with sequences of hydrographs of different duration and magnitudes, on pool-riffle self-maintenance. A physical model of pool-riffle units is developed based on a field site. Scaling results show the similarity of particle motion between model and prototype (based on the Shields diagram) and the validity of applying the experimental results to the field site or any hypothetical stream. Two scenarios of experiments are used to explore how pool-riffle units respond to decreasing and increasing patterns of sediment supply during sequences of hydrographs. The experimental results are then used to show how bed geometry, sediment supply and flow hydrograph interact and impact on pool-riffle self-maintenance. Channel width variation constitutes the dominant effect on the alterations of the velocities and turbulence intensities compared to the vertical topographic variability, as, during higher flow rates, near-bed velocity and turbulence intensity were higher in the pool centre (narrower channel section) than in the pool tail and riffle. The complex relationship between erosion-deposition events and shear stresses indicates the competing effects of reversal episodes and sediment supply rate. The effect of reversal episodes is more significant for the shallower pool morphodynamics and under equilibrium conditions. The pool-riffle unit responds to the increase of sediment supply by bed fining and increasing the average bed slope, and reacts to reduced sediment supply by bed coarsening and decreasing average bed slope. Finer fractions play a significant role in…
Advisors/Committee Members: University of Newcastle. Faculty of Engineering & Built Environment, School of Engineering.
Subjects/Keywords: pool-riffle sequences; flow; hydrograph; sediment transport; bed geometry
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APA (6th Edition):
Vahidi, E. (2019). Response of pool-riffle dynamics to changes in sediment supply and flow hydrographs. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/1407952
Chicago Manual of Style (16th Edition):
Vahidi, Elham. “Response of pool-riffle dynamics to changes in sediment supply and flow hydrographs.” 2019. Doctoral Dissertation, University of Newcastle. Accessed January 19, 2021.
http://hdl.handle.net/1959.13/1407952.
MLA Handbook (7th Edition):
Vahidi, Elham. “Response of pool-riffle dynamics to changes in sediment supply and flow hydrographs.” 2019. Web. 19 Jan 2021.
Vancouver:
Vahidi E. Response of pool-riffle dynamics to changes in sediment supply and flow hydrographs. [Internet] [Doctoral dissertation]. University of Newcastle; 2019. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/1959.13/1407952.
Council of Science Editors:
Vahidi E. Response of pool-riffle dynamics to changes in sediment supply and flow hydrographs. [Doctoral Dissertation]. University of Newcastle; 2019. Available from: http://hdl.handle.net/1959.13/1407952
Delft University of Technology
13.
Pol, J.C. (author).
Hydrograph shape variability on the river Meuse.
Degree: 2014, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:f4ac12a4-20c0-4b87-8d18-4cf9effe9131
► Design water levels are a basic concept in flood risk management practice. These water levels with a specified return period are used for the design…
(more)
▼ Design water levels are a basic concept in flood risk management practice. These water levels with a specified return period are used for the design of dikes and other flood protection measures along the river Meuse. Current practice is that these water levels are determined by hydrodynamic simulation of a standard design hydrograph at the upstream gauging station Borgharen. The peak discharge of this standard design hydrograph is based on a frequency analysis and its shape is determined by scaling and averaging all flood hydrographs in the dataset. Then it is assumed that the simulated water levels have the same return period as the peak discharge at Borgharen. Until now, this method was not validated. The aim of this thesis is to investigate the influence of hydrograph shape on design water levels on the river Meuse, and to evaluate current and alternative methods to take this shape into account. The five alternative methods are (1) hydrodynamic simulation of all floods in the dataset and apply frequency analysis afterwards on the simulated water levels (the reference), (2) the standard method extended with dependence between the hydrograph shape and the peak discharge, (3) vertical averaging, and two probabilistic methods which combine hydrograph shape statistics at Borgharen with a transformation function that relates local water levels to these hydrograph shape statistics. Within the probabilistic methods one can distinguish explicit (4), which expresses the statistics in probability distribution functions, and implicit (5), which does not use these functions. The influence of hydrograph shape variables on the downstream water level was investigated by means of a correlation analysis. To evaluate the different methods, all methods were applied to a GRADE dataset of 50,000 years of generated discharge at Borgharen, and the resulting design water levels compared to the reference. In addition to the ability to estimate design water levels, the methods were evaluated on the ability to estimate the design water level reduction of a retention basin (Lob van Gennep). Peak discharge combined with peak curvature were found to be good predictors of the downstream water levels, and were used in the probabilistic methods. The evaluation of methods shows that the currently used standard hydrograph method overestimates the design water levels up to 37 cm with respect to the reference. The present research shows that the current method to determine design water levels can be improved significantly. A simple improvement is to use the vertically averaged design hydrograph with a modified selection interval. More advanced probabilistic methods also improve the estimates, and are potentially valuable in case of retention basins, of which the effectiveness is sensitive to the hydrograph shape.
Hydraulic Engineering
Civil Engineering and Geosciences
Advisors/Committee Members: Kok, M. (mentor), Barneveld, H.J. (mentor), Morales Napoles, O. (mentor), Mosselman, E. (mentor), Schielen, R.M.J. (mentor).
Subjects/Keywords: design water levels; hydrograph shape; probabilistic; Meuse; GRADE; retention basins
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APA (6th Edition):
Pol, J. C. (. (2014). Hydrograph shape variability on the river Meuse. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:f4ac12a4-20c0-4b87-8d18-4cf9effe9131
Chicago Manual of Style (16th Edition):
Pol, J C (author). “Hydrograph shape variability on the river Meuse.” 2014. Masters Thesis, Delft University of Technology. Accessed January 19, 2021.
http://resolver.tudelft.nl/uuid:f4ac12a4-20c0-4b87-8d18-4cf9effe9131.
MLA Handbook (7th Edition):
Pol, J C (author). “Hydrograph shape variability on the river Meuse.” 2014. Web. 19 Jan 2021.
Vancouver:
Pol JC(. Hydrograph shape variability on the river Meuse. [Internet] [Masters thesis]. Delft University of Technology; 2014. [cited 2021 Jan 19].
Available from: http://resolver.tudelft.nl/uuid:f4ac12a4-20c0-4b87-8d18-4cf9effe9131.
Council of Science Editors:
Pol JC(. Hydrograph shape variability on the river Meuse. [Masters Thesis]. Delft University of Technology; 2014. Available from: http://resolver.tudelft.nl/uuid:f4ac12a4-20c0-4b87-8d18-4cf9effe9131
Delft University of Technology
14.
Gradussen, Bas (author).
Schematisation of discharge time series in morphodynamic river models.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:dff92c0c-c511-46d2-aeb2-ac1792f8256a
► River discharge is an essential parameter in morphodynamic modelling. It proves to be highly variable in both time and space. In this thesis the impact…
(more)
▼ River discharge is an essential parameter in morphodynamic modelling. It proves to be highly variable in both time and space. In this thesis the impact of the schematisation of time-dependent discharge series on morphodynamic change is studied. The impact is governed by several factors such as the long-term discharge statistics, and both short- and long-term sequences of discharge stages. A variable river discharge itself does not necessarily result in morphodynamic change. Changes in conveyance area and roughness are dominant sources of bed fluctuations and bed waves. Moreover, backwater dominated segments are
subject to mild fluctuations in the river bed. The combination of natural variation of hydrological processes in the upstream river catchment and the absence of a significant correlation among statistical characteristics of subsequent years makes it hard for river engineers to construct discharge time series for river models that simulate morphodynamic development. The limited predictability of future discharge time series is an important source of uncertainty in model predictions. A way to estimate this uncertainty is by means of a time-consuming Monte Carlo approach, resulting in a mean long-term morphodynamic trend and the associated uncertainty. An alternative method is the application of a deterministic series for which the long-term discharge statistics are translated into a cycled annual
hydrograph (CAH). It is expected to yield similar morphodynamic changes with respect to the mean trend from the Monte Carlo approach without the need for a large number of computations. However, as is demonstrated in this study, the CAH-method lacks in performance in simulating average long-term development and the amplitude of fluctuations in the river bed, especially at locations where strong sediment transport gradients are experienced. Using a simplified two-dimensional model that represents a locally widened floodplain, the impact of the included bandwidth, short-term and long-term sequences on morphodynamic change is investigated. The aim is to improve the deterministic
hydrograph schematisation and to find a more convenient way to get insight into uncertainty in simulated morphodynamics. These findings result in a set of recommendations for future schematisations of discharge time series in morphodynamic river models. An improved deterministic approach is proposed. Using historical measurements of daily discharge data, years with a similar statistical maximum, mean and standard deviation can be classified. The classified years are translated into multiple cycled annual hydrographs (MCAH). By using these hydrographs, synthetic time series are constructed. Compared to the CAH-approach, the proposed MCAH-method yields a significant reduction of the root mean square error with respect to the long-term average morphodynamic trend from the Monte Carlo simulations. Moreover, the MCAH-series result in amplitudes of bed fluctuations that are closer to the response to natural discharge time series. Finally, the MCAH-series…
Advisors/Committee Members: Blom, Astrid (mentor), Labeur, Robert Jan (graduation committee), Barneveld, Hermjan (graduation committee), Sloff, Kees (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: River morphodynamics; Variable discharge; Morphodynamic model; Long-term time series; Hydrograph
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APA ·
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APA (6th Edition):
Gradussen, B. (. (2019). Schematisation of discharge time series in morphodynamic river models. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:dff92c0c-c511-46d2-aeb2-ac1792f8256a
Chicago Manual of Style (16th Edition):
Gradussen, Bas (author). “Schematisation of discharge time series in morphodynamic river models.” 2019. Masters Thesis, Delft University of Technology. Accessed January 19, 2021.
http://resolver.tudelft.nl/uuid:dff92c0c-c511-46d2-aeb2-ac1792f8256a.
MLA Handbook (7th Edition):
Gradussen, Bas (author). “Schematisation of discharge time series in morphodynamic river models.” 2019. Web. 19 Jan 2021.
Vancouver:
Gradussen B(. Schematisation of discharge time series in morphodynamic river models. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 19].
Available from: http://resolver.tudelft.nl/uuid:dff92c0c-c511-46d2-aeb2-ac1792f8256a.
Council of Science Editors:
Gradussen B(. Schematisation of discharge time series in morphodynamic river models. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:dff92c0c-c511-46d2-aeb2-ac1792f8256a
University of Minnesota
15.
Luhmann, Andrew James.
Water temperature as a tracer in karst aquifers.
Degree: PhD, 2011, University of Minnesota
URL: http://purl.umn.edu/113204
► Water temperature at springs generally provides useful information concerning aquifer geometry and recharge. Temperature monitoring at 25 springs and cave streams in southeastern Minnesota has…
(more)
▼ Water temperature at springs generally provides useful information concerning aquifer geometry and recharge. Temperature monitoring at 25 springs and cave streams in southeastern Minnesota has shown four distinct thermal patterns that can be interpreted in terms of heat exchange effectiveness along a flow path and the nature of recharge. The patterns provide information about the size of the flow path, recharge type and duration, and aquifer depth.
Water temperature is generally an interactive tracer, where heat exchange rapidly occurs when water and aquifer rock are at different temperatures. In a multi-tracer experiment at Freiheit Spring, MN, uranine, chloride, and δD breakthrough curves were essentially identical and conservative. In contrast, the water temperature interacted with the aquifer as it moved along the flow path, producing a damped, lagged thermal signal at the spring. However, both the conservative and nonconservative tracers provide useful geometrical information. By summing discharge between the initial increase in stage produced by a pressure pulse and the chloride peak, the conduit volume is estimated as 51 m3. Using a heat transport simulation to reproduce the modified thermal signal requires a planar flow path with a hydraulic diameter of 7 cm. Both methods together suggest a bedding plane flow path that is 3.5 cm high by 10 m wide, in agreement with the observed spring geometry. The different tracers provide complementary information and stronger constraints on flow path geometry than could be obtained using a single tracer.
Finally, numerical simulations were run to determine variables controlling thermal retardation in karst conduits. The lag of a thermal peak in the water is proportional to a conduit's length; is proportional to the square root of recharge duration, rock thermal conductivity, rock specific heat, and rock density; and is inversely proportional to a conduit's hydraulic diameter, velocity, water specific heat, and water density. These individual relationships were then combined to form one collective function, which, when plotted against thermal peak lag produced a line in log-log space. The relationship between the thermal peak lag and the combined function potentially enables estimates of conduit geometry using thermal peak lag data.
Subjects/Keywords: Aquifer; Heat transport; Hydrograph; Karst; Spring; Water temperature; Geology
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APA (6th Edition):
Luhmann, A. J. (2011). Water temperature as a tracer in karst aquifers. (Doctoral Dissertation). University of Minnesota. Retrieved from http://purl.umn.edu/113204
Chicago Manual of Style (16th Edition):
Luhmann, Andrew James. “Water temperature as a tracer in karst aquifers.” 2011. Doctoral Dissertation, University of Minnesota. Accessed January 19, 2021.
http://purl.umn.edu/113204.
MLA Handbook (7th Edition):
Luhmann, Andrew James. “Water temperature as a tracer in karst aquifers.” 2011. Web. 19 Jan 2021.
Vancouver:
Luhmann AJ. Water temperature as a tracer in karst aquifers. [Internet] [Doctoral dissertation]. University of Minnesota; 2011. [cited 2021 Jan 19].
Available from: http://purl.umn.edu/113204.
Council of Science Editors:
Luhmann AJ. Water temperature as a tracer in karst aquifers. [Doctoral Dissertation]. University of Minnesota; 2011. Available from: http://purl.umn.edu/113204
University of South Florida
16.
Lott, Darline Alegria.
The Utility of the Conductivity Mass-Balance Method for Base Flow Separation in Rivers and Streams.
Degree: 2018, University of South Florida
URL: https://scholarcommons.usf.edu/etd/8124
► Freshwater for ecosystems, drinking water, and water for various businesses are important resources and those resources are rapidly diminishing globally due to drought and overuse.…
(more)
▼ Freshwater for ecosystems, drinking water, and water for various businesses are important resources and those resources are rapidly diminishing globally due to drought and overuse. In order to manage the availability of water for all concerned, good estimates of base flow (groundwater) is required. Base flow, a component of streamflow, is deduced by separating a stream hydrograph into two components, base flow and runoff. There are several techniques used to perform base flow separation; however two techniques are used in this study, chemical mass-balance and analytical methods. This dissertation explains how an analytical technique was derived from a mass-balance method, how that particular analytical method compares to several other analytical techniques, also the analytical and mass-balance method used with discrete data.
Chapter 2 explains how an analytical method, termed the power function method (PFM) in the form of aQb + cQ, was derived from the mass-balance technique called the conductivity mass-balance (CMB) method. Regardless of the method used to separate base flow, calibration is needed at each specific gage. The PFM or any other analytical base flow separation method is not as sensitive to base flow suppression at high discharges as the CMB method therefore, analytical methods may overestimate base flow at high discharges. Applying regionally–averaged coefficients of the PFM or uncalibrated analytical methods to estimate base flow may provide unreasonable large errors. The coefficients of the PFM are acquired from stream flow conductance obtained over many storm events. For single events, the PFM is not as accurate as the CMB or other tracer methods. It is more appropriate for assessing base flow contributions over longer periods than single events. However, the PFM coefficients are derived directly from a basin and gage dependent variable, specific conductance and use of the PFM for single events is more justifiable than applying uncalibrated analytical methods.
Chapter 3 compares six analytical base flow separation techniques to Stewart et al. (2007) conductivity mass-balance (CMB) method. Seven methods were used to determine the base flow index value (BFI) on 35 stream gages with each gage having two years of specific conductance data and 30 years of continuous discharge data. Base flow index is dimensionless and varies between 0 and 1. One of the six analytical base flow methods, the power function (aQb + cQ), is inherently calibrated and returns similar results as mass balance techniques. After calibrating the other analytical methods, they were able to replicate CMB base flow values. The results of this study suggest that analytical base flow method should be calibrated against a tracer or mass balance method.
Chapter 4 determines if base flow separation can be accomplished using discrete data instead of continuous data. The data from stream gages of the previous studies, Chapter 2 and Chapter 3, have over two years of continuously collected specific conductance data, however the norm at stream…
Subjects/Keywords: Ground water; Hydrograph; Runoff; Specific conductance; Geology; Hydrology
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APA (6th Edition):
Lott, D. A. (2018). The Utility of the Conductivity Mass-Balance Method for Base Flow Separation in Rivers and Streams. (Thesis). University of South Florida. Retrieved from https://scholarcommons.usf.edu/etd/8124
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lott, Darline Alegria. “The Utility of the Conductivity Mass-Balance Method for Base Flow Separation in Rivers and Streams.” 2018. Thesis, University of South Florida. Accessed January 19, 2021.
https://scholarcommons.usf.edu/etd/8124.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lott, Darline Alegria. “The Utility of the Conductivity Mass-Balance Method for Base Flow Separation in Rivers and Streams.” 2018. Web. 19 Jan 2021.
Vancouver:
Lott DA. The Utility of the Conductivity Mass-Balance Method for Base Flow Separation in Rivers and Streams. [Internet] [Thesis]. University of South Florida; 2018. [cited 2021 Jan 19].
Available from: https://scholarcommons.usf.edu/etd/8124.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lott DA. The Utility of the Conductivity Mass-Balance Method for Base Flow Separation in Rivers and Streams. [Thesis]. University of South Florida; 2018. Available from: https://scholarcommons.usf.edu/etd/8124
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Georgia
17.
Martin, Joel Alexander.
Development of a tropical geographic unit hydrograph in the Luquillo Mountains of eastern Puerto Rico.
Degree: 2016, University of Georgia
URL: http://hdl.handle.net/10724/36252
► Synthetic unit hydrographs (SUHs) are useful numeric models developed to predict empirical unit hydrograph parameters as a function of watershed characteristics. These statistical equations usually…
(more)
▼ Synthetic unit hydrographs (SUHs) are useful numeric models developed to predict empirical unit hydrograph parameters as a function of watershed characteristics. These statistical equations usually relate peak flow and timing to watershed
characteristics. Once produced, a SUH estimates a storm hydrograph at the outlet of a watershed for a given excess precipitation amount. A sub class of SUHs is the Geographic Unit Hydrographs (GUH), which is informed by the geographic properties of
basins (i.e. average slope, average land use, annual precipitation). Recent GUH models use geographic information systems (GIS) allow scientist and engineers to model the flow path and velocity to calculate the runoff response of that basin. This
Tropical Geographic Unit Hydrograph (tGUH) model is developed for a specific tropical island environment, and includes an analytical methodology to derive required empirical coefficients directly from observed geographic characteristics, which in turn
can provide a more consistent runoff estimate between users. Additionally, with the tGUH described here, unit hydrograph parameters are found to be sensitive to non-stationary parameters including land use (attributable to anthropogenic change) and
annual precipitation change (attributable to climate change).
Subjects/Keywords: Unit Hydrograph; Synthetic Unit Hydrographs; GIS; Tropical Hydrology
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APA (6th Edition):
Martin, J. A. (2016). Development of a tropical geographic unit hydrograph in the Luquillo Mountains of eastern Puerto Rico. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/36252
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Martin, Joel Alexander. “Development of a tropical geographic unit hydrograph in the Luquillo Mountains of eastern Puerto Rico.” 2016. Thesis, University of Georgia. Accessed January 19, 2021.
http://hdl.handle.net/10724/36252.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Martin, Joel Alexander. “Development of a tropical geographic unit hydrograph in the Luquillo Mountains of eastern Puerto Rico.” 2016. Web. 19 Jan 2021.
Vancouver:
Martin JA. Development of a tropical geographic unit hydrograph in the Luquillo Mountains of eastern Puerto Rico. [Internet] [Thesis]. University of Georgia; 2016. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/10724/36252.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Martin JA. Development of a tropical geographic unit hydrograph in the Luquillo Mountains of eastern Puerto Rico. [Thesis]. University of Georgia; 2016. Available from: http://hdl.handle.net/10724/36252
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Utah State University
18.
Sorsby, Skyler J.
Mountain-Block Recharge to the Cache Valley Principal Aquifer and Geochemical Controls on Groundwater Movement in Alpine Karst.
Degree: MS, Geology, 2019, Utah State University
URL: https://digitalcommons.usu.edu/etd/7466
► Groundwater is documented to flow through solution-widened fractures and bedding planes in limestone and dolostone units in low-relief topography. This enhancement, or karstification, is…
(more)
▼ Groundwater is documented to flow through solution-widened fractures and bedding planes in limestone and dolostone units in low-relief topography. This enhancement, or karstification, is much harder to study in alpine environments like the Bear River Range of northern Utah. This is problematic, due to the fact that the Bear River Range karst aquifer system supplies the City of Logan with a large quantity of water at Dewitt Spring. Furthermore, the karst aquifer sustains the Logan River for much of the year, and may allow groundwater to flow directly in the subsurface to the Cache Valley principal aquifer system.
Flow measurements along the Logan River constrain a minimum volume of 2.32x106 m3 /y (1.88x103 af/y) that could recharge the Cache Valley principal aquifer. Hydraulic characteristics of alpine karst were estimated by analysis of major ions, stable isotopes, and dissolved gases in spring waters. These data reflect quick groundwater flow through caverns, with no evidence for “diffuse” flow anticipated by some to occupy interstitial space. In fact, the oldest reasonable estimated recharge age for groundwater is 70 years. Young recharge, fast flow, and low storage capability indicate that alpine karst aquifers are very sensitive to droughts and that related water resources are vulnerable to longer-term changes in climate.
Advisors/Committee Members: Thomas E. Lachmar, Dennis Newell, Robert Q. Oaks, Jr., ;.
Subjects/Keywords: alpine karst; groundwater; environmental tracers; geochemical modeling; hydrograph analysis; Geology
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APA (6th Edition):
Sorsby, S. J. (2019). Mountain-Block Recharge to the Cache Valley Principal Aquifer and Geochemical Controls on Groundwater Movement in Alpine Karst. (Masters Thesis). Utah State University. Retrieved from https://digitalcommons.usu.edu/etd/7466
Chicago Manual of Style (16th Edition):
Sorsby, Skyler J. “Mountain-Block Recharge to the Cache Valley Principal Aquifer and Geochemical Controls on Groundwater Movement in Alpine Karst.” 2019. Masters Thesis, Utah State University. Accessed January 19, 2021.
https://digitalcommons.usu.edu/etd/7466.
MLA Handbook (7th Edition):
Sorsby, Skyler J. “Mountain-Block Recharge to the Cache Valley Principal Aquifer and Geochemical Controls on Groundwater Movement in Alpine Karst.” 2019. Web. 19 Jan 2021.
Vancouver:
Sorsby SJ. Mountain-Block Recharge to the Cache Valley Principal Aquifer and Geochemical Controls on Groundwater Movement in Alpine Karst. [Internet] [Masters thesis]. Utah State University; 2019. [cited 2021 Jan 19].
Available from: https://digitalcommons.usu.edu/etd/7466.
Council of Science Editors:
Sorsby SJ. Mountain-Block Recharge to the Cache Valley Principal Aquifer and Geochemical Controls on Groundwater Movement in Alpine Karst. [Masters Thesis]. Utah State University; 2019. Available from: https://digitalcommons.usu.edu/etd/7466
19.
Silveira, Gislaine Massuia da.
Análise de sensibilidade de hidrogramas de projeto aos parâmetros de sua definição indireta.
Degree: Mestrado, Engenharia Hidráulica, 2010, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/3/3147/tde-17082010-125920/
;
► É realizada neste trabalho uma análise de sensibilidade das variáveis de entrada na determinação de hidrogramas de cheia em bacias hidrográficas desprovida de dados hidrológicos.…
(more)
▼ É realizada neste trabalho uma análise de sensibilidade das variáveis de entrada na determinação de hidrogramas de cheia em bacias hidrográficas desprovida de dados hidrológicos. Analisou-se a influência do CN (número de curva), da área de drenagem, do tempo de concentração, da duração da chuva e do período de retorno sobre os hidrogramas de cheia calculados. É feita uma comparação entre os métodos do hidrograma do SCS, Santa Bárbara e Clark. Para dar subsídio às análises de sensibilidade, utiliza-se o sistema de suporte à decisão ABC 6, desenvolvido na Universidade de São Paulo (USP). Um estudo de aplicação prática é elaborado para avaliar a influência da vazão no projeto de estruturas hidráulicas. Os resultados mostram quanto as variáveis de entrada influenciam na determinação das vazões e quanto estas vazões influenciam no projeto das estruturas hidráulicas. Como recomendação geral, visto a facilidade no uso de ferramentas computacionais e sistemas de suporte a decisão, sugere-se que sempre seja realizada uma análise de sensibilidade nos estudos hidrológicos. A análise de sensibilidade irá permitir a avaliação dos erros e incertezas que são cometidos quando da adoção das variáveis de entrada.
A sensitivity analysis of input variables for flood hydrographs determination in watersheds without observed hydrological data is presented in this work. Influence of CN (number of curve), drainage area, time of concentration, rainfall duration and return period on the calculated flood hydrographs is analyzed. It is made a comparison among three unit hydrographs methods: SCS, Santa Barbara and Clark. ABC 6, a decision support system developed at USP (Universidade de São Paulo) is used as a tool for sensitivity analysis. A study of practical application is made to examine the influence of flow in design of hydraulic structures. Results show how input variables influence calculated flows and how these flows influence design of hydraulic structures. It is suggested, by the fact that computational tools and decision support systems are easy to use, that a sensitivity analysis in hydrological studies must be always be performed. Sensitivity analysis will allow evaluation of hydrologic design results due to errors and uncertainness caused by input variables.
Advisors/Committee Members: Zahed Filho, Kamel.
Subjects/Keywords: ABC 6; ABC 6; Decision support system; Flood hydrograph; Hidrograma de cheia; Hidrogramas sintéticos; Pequenas bacias hidrográficas; Sistema de suporte à decisão; Small watershed; Synthetic hydrograph
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APA (6th Edition):
Silveira, G. M. d. (2010). Análise de sensibilidade de hidrogramas de projeto aos parâmetros de sua definição indireta. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/3/3147/tde-17082010-125920/ ;
Chicago Manual of Style (16th Edition):
Silveira, Gislaine Massuia da. “Análise de sensibilidade de hidrogramas de projeto aos parâmetros de sua definição indireta.” 2010. Masters Thesis, University of São Paulo. Accessed January 19, 2021.
http://www.teses.usp.br/teses/disponiveis/3/3147/tde-17082010-125920/ ;.
MLA Handbook (7th Edition):
Silveira, Gislaine Massuia da. “Análise de sensibilidade de hidrogramas de projeto aos parâmetros de sua definição indireta.” 2010. Web. 19 Jan 2021.
Vancouver:
Silveira GMd. Análise de sensibilidade de hidrogramas de projeto aos parâmetros de sua definição indireta. [Internet] [Masters thesis]. University of São Paulo; 2010. [cited 2021 Jan 19].
Available from: http://www.teses.usp.br/teses/disponiveis/3/3147/tde-17082010-125920/ ;.
Council of Science Editors:
Silveira GMd. Análise de sensibilidade de hidrogramas de projeto aos parâmetros de sua definição indireta. [Masters Thesis]. University of São Paulo; 2010. Available from: http://www.teses.usp.br/teses/disponiveis/3/3147/tde-17082010-125920/ ;
20.
TUMIAR KATARINA B MANIK.
Hydrological consequences of converting forested land to coffee plantations and other agriculture crops in Sumber Jaya watershed, West Lampung, Indonesia.
Degree: 2009, National University of Singapore
URL: https://scholarbank.nus.edu.sg/handle/10635/16620
Subjects/Keywords: Catchment; rainfall; water discharge; hydrograph analysis; unit hydrograph and scaling factor
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APA (6th Edition):
MANIK, T. K. B. (2009). Hydrological consequences of converting forested land to coffee plantations and other agriculture crops in Sumber Jaya watershed, West Lampung, Indonesia. (Thesis). National University of Singapore. Retrieved from https://scholarbank.nus.edu.sg/handle/10635/16620
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
MANIK, TUMIAR KATARINA B. “Hydrological consequences of converting forested land to coffee plantations and other agriculture crops in Sumber Jaya watershed, West Lampung, Indonesia.” 2009. Thesis, National University of Singapore. Accessed January 19, 2021.
https://scholarbank.nus.edu.sg/handle/10635/16620.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
MANIK, TUMIAR KATARINA B. “Hydrological consequences of converting forested land to coffee plantations and other agriculture crops in Sumber Jaya watershed, West Lampung, Indonesia.” 2009. Web. 19 Jan 2021.
Vancouver:
MANIK TKB. Hydrological consequences of converting forested land to coffee plantations and other agriculture crops in Sumber Jaya watershed, West Lampung, Indonesia. [Internet] [Thesis]. National University of Singapore; 2009. [cited 2021 Jan 19].
Available from: https://scholarbank.nus.edu.sg/handle/10635/16620.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
MANIK TKB. Hydrological consequences of converting forested land to coffee plantations and other agriculture crops in Sumber Jaya watershed, West Lampung, Indonesia. [Thesis]. National University of Singapore; 2009. Available from: https://scholarbank.nus.edu.sg/handle/10635/16620
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universidade Federal de Viçosa
21.
Hugo Alexandre Soares Guedes.
Modelagem hidrodinâmica do ecossistema aquático visando à determinação do hidrograma ecológico no rio Formoso - MG.
Degree: 2013, Universidade Federal de Viçosa
URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4922
► Objetivou-se, neste trabalho, modelar hidrodinamicamente o ecossistema aquático visando determinar o hidrograma ecológico no rio Formoso - MG. A área de estudo foi dividida em…
(more)
▼ Objetivou-se, neste trabalho, modelar hidrodinamicamente o ecossistema aquático visando determinar o hidrograma ecológico no rio Formoso - MG. A área de estudo foi dividida em dois trechos de monitoramento de 1 km de extensão, distantes um do outro em aproximadamente 14 km. A simulação de habitats disponíveis e a sua relação com as vazões no rio Formoso, assim como a determinação do hidrograma ecológico, foram realizados utilizando-se o modelo hidrodinâmico River2D, que consiste em um modelo bidimensional utilizado para estudar os efeitos das alterações de vazões sobre o ecossistema aquático. Com intuito de calibrar o modelo River2D e determinar o hidrograma ecológico foi necessário quantificar in situ, por meio de experimentos de campo, diversas variáveis hidráulicas, hidrológicas e biológicas. Desse modo, foram realizadas quatro campanhas de campo, duas no período seco (Junho de 2011 e Julho de 2012) e duas no período chuvoso (Março de 2011 e Fevereiro de 2012). A caracterização do micro-habitat foi feita nos dois trechos do rio Formoso em 1 km de extensão, onde em cada trecho foram demarcadas três seções transversais equidistantes de 500 metros, nas quais foram realizadas coletas de dados de velocidade, profundidade, vazão, cobertura e substrato, além de inventariar a composição taxonômica da ictiofauna no rio. Os experimentos de campo possibilitaram identificar 17 espécies de peixes no rio Formoso, sendo coletados 226 indivíduos em 24 amostras. Verificou-se que a composição taxonômica é caracterizada principalmente pelas espécies Astyanax bimaculatus (lambari) e Hypostomus affinis (cascudo), em função da quantidade de indivíduos nas seções amostradas. A biologia das espécies, por meio da modelagem de habitat, a partir das curvas de índice de aptidão de habitat, permitiu fracionar a composição taxonômica em três grupos distintos (espécies intolerantes, médio tolerantes e tolerantes), sendo as espécies Hypostomus auroguttatus (cascudo), Oligosarcus hepsetus (lambari-cachorro) e Leporinus mormyrops (timburé) bioindicadoras da qualidade do ecossistema aquático. O modelo hidrodinâmico River2D se mostrou apto a ser utilizado nas simulações hidráulicas e de habitat nos dois trechos estudados no rio Formoso. O regime de vazões ecológicas no Trecho 1 variou entre 2,70 e 4,99 m3 s-1, referentes aos meses de agosto e janeiro, respectivamente. Já no Trecho 2, os valores de vazões ecológicas ficaram entre 2,85 a 4,13 m3 s-1, referentes aos meses de dezembro e maio, respectivamente. As vazões ecológicas mensais propostas nos dois trechos de monitoramento no rio Formoso foram comparadas com as vazões mínimas de referência adotadas no Brasil, sendo considerada a permanência de 100% da Q7,10, Q95 e Q90 no curso dágua, comprovando que essas metodologias não levam em consideração os aspectos ambientais, colocando em risco a permanência das espécies ali existentes e a biodiversidade local. O objetivo destas análises foi mostrar que a vazão ecológica, proposta nesse estudo, possui variabilidade temporal e espacial, e que fixar apenas…
Advisors/Committee Members: Celso Bandeira de Melo Ribeiro, Mauro Aparecido Martinez, Jorge Abdala Dergam dos Santos, Michel Castro Moreira, Ana Augusta Passos Rezende, Silvio Bueno Pereira, Demetrius David da Silva.
Subjects/Keywords: RECURSOS HIDRICOS; Ecossistema aquático; Hidrograma ecológico; Modelagem hidrodnâmica; Aquatic ecosystem; Ecological hydrograph; Hydrodynamic modelling
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APA (6th Edition):
Guedes, H. A. S. (2013). Modelagem hidrodinâmica do ecossistema aquático visando à determinação do hidrograma ecológico no rio Formoso - MG. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4922
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Guedes, Hugo Alexandre Soares. “Modelagem hidrodinâmica do ecossistema aquático visando à determinação do hidrograma ecológico no rio Formoso - MG.” 2013. Thesis, Universidade Federal de Viçosa. Accessed January 19, 2021.
http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4922.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Guedes, Hugo Alexandre Soares. “Modelagem hidrodinâmica do ecossistema aquático visando à determinação do hidrograma ecológico no rio Formoso - MG.” 2013. Web. 19 Jan 2021.
Vancouver:
Guedes HAS. Modelagem hidrodinâmica do ecossistema aquático visando à determinação do hidrograma ecológico no rio Formoso - MG. [Internet] [Thesis]. Universidade Federal de Viçosa; 2013. [cited 2021 Jan 19].
Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4922.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Guedes HAS. Modelagem hidrodinâmica do ecossistema aquático visando à determinação do hidrograma ecológico no rio Formoso - MG. [Thesis]. Universidade Federal de Viçosa; 2013. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4922
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Texas A&M University
22.
Wang, Wei.
A hydrograph-based prediction of meander migration.
Degree: PhD, Civil Engineering, 2006, Texas A&M University
URL: http://hdl.handle.net/1969.1/3805
► Meander migration is a process in which water flow erodes soil on one bank and deposits it on the opposite bank creating a gradual shift…
(more)
▼ Meander migration is a process in which water flow erodes soil on one bank and
deposits it on the opposite bank creating a gradual shift of the bank line over time. For
bridges crossing such a river, the soil foundation of the abutments may be eroded away
before the designed lifetime is reached. For highways parallel to and close to such a
river, the whole road may be eaten away. This problem is costing millions of dollars to
TxDOT in protection of affected bridges and highway embankments. This research is
aimed at developing a methodology which will predict the possible migration of a
meander considering the design life of bridges crossing it and highways parallel to it.
The approaches we use are experimental tests, numerical simulation, modeling of
migration, risk analysis, and development of a computer program.
Experimental tests can simulate river flow in a controlled environment.
Influential parameters can be chosen, adjusted, and varied systematically to quantify
their influence on the problem. The role of numerical simulation is to model the flow
field and the stress field at the soil-water interface. Migration modeling is intended to
integrate the results of experimental tests and numerical simulations and to develop a
model which can make predictions. The Hyperbolic Model is used and its two major
components Mmax equation and τmax equation are developed. Uncertainties in the
parameters used for prediction make deterministic prediction less meaningful. Risk
analysis is used to make the prediction based on a probabilistic approach. Hand
calculation is too laborious to apply these procedures. Thus the development of a user
friendly computer program is needed to automate the calculations.
Experiments performed show that the Hyperbolic Model matches the test data
well and is suitable for the prediction of meander migration. Based on analysis of shear stress data from numerical simulation, the τmax equation was derived for the Hyperbolic
Model. Extensive work on the simplification of river geometry produced a working
solution. The geometry of river channels can be automatically simplified into arcs and
straight lines. Future
hydrograph is critical to risk analysis. Tens of thousands of
hydrographs bearing the same statistical characteristics as in history can be generated.
The final product that can be directly used, the MEANDER program, consists of 11,600
lines of code in C++ and 2,500 lines of code in Matlab, not including the part of risk
analysis. The computer program is ready for practice engineers to make predictions
based on the findings of this research.
Advisors/Committee Members: Briaud, Jean-Louis (advisor), Chang, Kuang-An (committee member), Chen, Hamn-Ching (committee member), Zhan, Hongbin (committee member).
Subjects/Keywords: Meander Migration; Hydrograph; Prediction; Bank erosion
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Manager
APA (6th Edition):
Wang, W. (2006). A hydrograph-based prediction of meander migration. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/3805
Chicago Manual of Style (16th Edition):
Wang, Wei. “A hydrograph-based prediction of meander migration.” 2006. Doctoral Dissertation, Texas A&M University. Accessed January 19, 2021.
http://hdl.handle.net/1969.1/3805.
MLA Handbook (7th Edition):
Wang, Wei. “A hydrograph-based prediction of meander migration.” 2006. Web. 19 Jan 2021.
Vancouver:
Wang W. A hydrograph-based prediction of meander migration. [Internet] [Doctoral dissertation]. Texas A&M University; 2006. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/1969.1/3805.
Council of Science Editors:
Wang W. A hydrograph-based prediction of meander migration. [Doctoral Dissertation]. Texas A&M University; 2006. Available from: http://hdl.handle.net/1969.1/3805
University of the Western Cape
23.
Damons, Matthew.
An assessment of the contribution of surface and subsurface flows to river flows of the
Sandspruit in the Berg River Catchment, South Africa.
Degree: 2018, University of the Western Cape
URL: http://hdl.handle.net/11394/6415
► Studies have shown that the primary origin of salinity in river flows of the Sandspruit in the Berg Catchment located in the Western Cape Province…
(more)
▼ Studies have shown that the primary origin of salinity in river flows of the Sandspruit in the Berg
Catchment located in the Western Cape Province of South Africa was mainly a result of atmospheric
deposition of salts. The salts are transported to rivers through surface runoff and subsurface flow (i.e.
through flow and groundwater flow). The purpose of this study was to determine the contributions of
subsurface and surface flows to the total flows in the Sandspruit, Berg Catchment. Three rain events
were studied. Water samples for two rain events were analysed for environmental tracers ?18O, Silica
or Silicon dioxide (SiO2), Calcium (Ca2+) and Magnesium (Mg2+). Tracers used for two component
hydrograph separation were ?18O and SiO2. The tracers, Ca2+ and Mg2+, revealed inconsistent
contributions of both subsurface flow and surface flow. Two component
hydrograph separations
indicated is that groundwater is the dominant contributor to flow, while surface runoff mainly
contributes during the onset of the storm event. Groundwater response to precipitation input indicated
that boreholes near the river have a quicker response than boreholes further away from the river.
Boreholes nearer to the river also indicate higher water levels in response to precipitation, in comparison
to boreholes further from the river.
Advisors/Committee Members: Mazvimavi, Dominic (advisor).
Subjects/Keywords: Surface and subsurface runoff; Environmental Isotopes; Deuterium; Salinity; Sandspruit; Tracers; Hydrograph separation
Record Details
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
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Manager
APA (6th Edition):
Damons, M. (2018). An assessment of the contribution of surface and subsurface flows to river flows of the
Sandspruit in the Berg River Catchment, South Africa.
(Thesis). University of the Western Cape. Retrieved from http://hdl.handle.net/11394/6415
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Damons, Matthew. “An assessment of the contribution of surface and subsurface flows to river flows of the
Sandspruit in the Berg River Catchment, South Africa.
” 2018. Thesis, University of the Western Cape. Accessed January 19, 2021.
http://hdl.handle.net/11394/6415.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Damons, Matthew. “An assessment of the contribution of surface and subsurface flows to river flows of the
Sandspruit in the Berg River Catchment, South Africa.
” 2018. Web. 19 Jan 2021.
Vancouver:
Damons M. An assessment of the contribution of surface and subsurface flows to river flows of the
Sandspruit in the Berg River Catchment, South Africa.
[Internet] [Thesis]. University of the Western Cape; 2018. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/11394/6415.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Damons M. An assessment of the contribution of surface and subsurface flows to river flows of the
Sandspruit in the Berg River Catchment, South Africa.
[Thesis]. University of the Western Cape; 2018. Available from: http://hdl.handle.net/11394/6415
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of the Western Cape
24.
Damons, Matthew.
An assessment of the contribution of surface and subsurface flows to river flows of the
Sandspruit in the Berg River Catchment, South Africa.
Degree: 2018, University of the Western Cape
URL: http://hdl.handle.net/11394/6417
► Studies have shown that the primary origin of salinity in river flows of the Sandspruit in the Berg Catchment located in the Western Cape Province…
(more)
▼ Studies have shown that the primary origin of salinity in river flows of the Sandspruit in the Berg
Catchment located in the Western Cape Province of South Africa was mainly a result of atmospheric
deposition of salts. The salts are transported to rivers through surface runoff and subsurface flow (i.e.
through flow and groundwater flow). The purpose of this study was to determine the contributions of
subsurface and surface flows to the total flows in the Sandspruit, Berg Catchment. Three rain events
were studied. Water samples for two rain events were analysed for environmental tracers ?18O, Silica
or Silicon dioxide (SiO2), Calcium (Ca2+) and Magnesium (Mg2+). Tracers used for two component
hydrograph separation were ?18O and SiO2. The tracers, Ca2+ and Mg2+, revealed inconsistent
contributions of both subsurface flow and surface flow. Two component
hydrograph separations
indicated is that groundwater is the dominant contributor to flow, while surface runoff mainly
contributes during the onset of the storm event. Groundwater response to precipitation input indicated
that boreholes near the river have a quicker response than boreholes further away from the river.
Boreholes nearer to the river also indicate higher water levels in response to precipitation, in comparison
to boreholes further from the river.
Advisors/Committee Members: Mazvimavi, D (advisor).
Subjects/Keywords: Surface and subsurface runoff
Environmental Isotopes; Deuterium; Salinity; Sandspruit; Tracers; Hydrograph separation
Record Details
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APA ·
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MLA ·
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CSE |
Export
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Manager
APA (6th Edition):
Damons, M. (2018). An assessment of the contribution of surface and subsurface flows to river flows of the
Sandspruit in the Berg River Catchment, South Africa.
(Thesis). University of the Western Cape. Retrieved from http://hdl.handle.net/11394/6417
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Damons, Matthew. “An assessment of the contribution of surface and subsurface flows to river flows of the
Sandspruit in the Berg River Catchment, South Africa.
” 2018. Thesis, University of the Western Cape. Accessed January 19, 2021.
http://hdl.handle.net/11394/6417.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Damons, Matthew. “An assessment of the contribution of surface and subsurface flows to river flows of the
Sandspruit in the Berg River Catchment, South Africa.
” 2018. Web. 19 Jan 2021.
Vancouver:
Damons M. An assessment of the contribution of surface and subsurface flows to river flows of the
Sandspruit in the Berg River Catchment, South Africa.
[Internet] [Thesis]. University of the Western Cape; 2018. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/11394/6417.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Damons M. An assessment of the contribution of surface and subsurface flows to river flows of the
Sandspruit in the Berg River Catchment, South Africa.
[Thesis]. University of the Western Cape; 2018. Available from: http://hdl.handle.net/11394/6417
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Colorado State University
25.
Czyzyk, Kelsey A.
Nonlinear synthetic unit hydrograph method that accounts for channel network type, A.
Degree: MS(M.S.), Civil and Environmental Engineering, 2018, Colorado State University
URL: http://hdl.handle.net/10217/189345
► Stormflow hydrographs are commonly estimated using synthetic unit hydrograph (UH) methods, particularly for ungauged basins. Current synthetic UHs either consider very limited aspects of basin…
(more)
▼ Stormflow hydrographs are commonly estimated using synthetic unit
hydrograph (UH) methods, particularly for ungauged basins. Current synthetic UHs either consider very limited aspects of basin geometry or require explicit representation of the basin flow paths. None explicitly considers the channel network type (i.e., dendritic, parallel, pinnate, rectangular, and trellis). The goal of this study is to develop and test a nonlinear synthetic UH that explicitly accounts for the network type. The synthetic UH is developed using kinematic wave travel time expressions for hillslope and channel points in the basin. The effects of the network structure are then isolated into two random variables whose distributions are estimated based on the network type. The proposed method is applied to ten basins from each classification and compared to other related methods. The results suggest that considering network type improves the estimated UHs with the largest improvements seen for dendritic, parallel, and pinnate networks.
Advisors/Committee Members: Niemann, Jeffrey D. (advisor), Gironás, Jorge (committee member), Ronayne, Michael J. (committee member).
Subjects/Keywords: kinematic wave; spatially distributed; unit hydrograph; network classification; drainage network; travel time
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APA ·
Chicago ·
MLA ·
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CSE |
Export
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Manager
APA (6th Edition):
Czyzyk, K. A. (2018). Nonlinear synthetic unit hydrograph method that accounts for channel network type, A. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/189345
Chicago Manual of Style (16th Edition):
Czyzyk, Kelsey A. “Nonlinear synthetic unit hydrograph method that accounts for channel network type, A.” 2018. Masters Thesis, Colorado State University. Accessed January 19, 2021.
http://hdl.handle.net/10217/189345.
MLA Handbook (7th Edition):
Czyzyk, Kelsey A. “Nonlinear synthetic unit hydrograph method that accounts for channel network type, A.” 2018. Web. 19 Jan 2021.
Vancouver:
Czyzyk KA. Nonlinear synthetic unit hydrograph method that accounts for channel network type, A. [Internet] [Masters thesis]. Colorado State University; 2018. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/10217/189345.
Council of Science Editors:
Czyzyk KA. Nonlinear synthetic unit hydrograph method that accounts for channel network type, A. [Masters Thesis]. Colorado State University; 2018. Available from: http://hdl.handle.net/10217/189345
Delft University of Technology
26.
Vos, M.J. (author).
Interactief hydrologisch computerprogramma, Hydrolin.
Degree: 1988, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:37863941-5371-454c-9171-c5c75b5546ae
► HYDROLIN gaat de mogelijkheden bieden om meetseries van neerslag en afvoer te verwerken in diverse modellen. Na de invoer van de meetseries via het toetsenbord…
(more)
▼ HYDROLIN gaat de mogelijkheden bieden om meetseries van neerslag en afvoer te verwerken in diverse modellen. Na de invoer van de meetseries via het toetsenbord kunnen hieraan diverse bewerkingen worden gedaan, zoals het aanbrengen van verliezen en scheidingen, teneinde met een keuze uit een scala van modellen een neerslag - afvoerrelatie af te leiden. Als eerste model is de theorie van de UNIT HYDROGRAPH - EENHEIDSAFVOERGOLF - ingebracht. Omdat de theorie van de UNIT HYDROGRAPH voor netto neerslag en de oppervlaktecomponent van de afvoer geldt, bevat HYDROLIN de mogelijkheid uit verschillende opties te kiezen om op bruto regengegevens verliezen in rekening te brengen en op de bruto afvoer een afvoerscheiding aan te brengen. Na invoer van de meetseries kunnen diverse manipulaties worden uitgevoerd met deze dataseries. Op vele wijzen is het mogelijk allerlei handige programma’s aan HYDROLIN te koppelen om bewerkingen te doen. Alle daarmee samenhangende databestanden worden op een extern geheugen vastgelegd, om tenslotte een selectie te kunnen doen ter bepaling van netto regen c.q. oppervlakteafvoer. Het “filtermanagement” wordt door de computer zelf en interactief afgehandeld als van HYDRDLIN-inputprocedures gebruikt wordt gemaakt. Alle in HVDRDLIN aangeboden opties worden in de vorm van menu's aan de gebruiker kenbaar gemaakt - het gehele computerprogramma is menu-gericht ontwikkeld. Ter verkrijging van de UNIT HYDRDGRAPH is een subprogramma voor de verwerking van matrices aanwezig. Weergave van de inhoud van de bestanden op het beeldscherm en naar een “extern device”, zoals een printer, kan geschieden in de vorm van data en grafisch.
Civil Engineering and Geosciences
Water mangement en hydrologie
Advisors/Committee Members: van Dam, J.C. (mentor), Vermeulen, J. (mentor).
Subjects/Keywords: Hydrologie; regenval; afvoer; oppervlakteafvoer; unit hydrograph
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APA ·
Chicago ·
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CSE |
Export
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APA (6th Edition):
Vos, M. J. (. (1988). Interactief hydrologisch computerprogramma, Hydrolin. (Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:37863941-5371-454c-9171-c5c75b5546ae
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Vos, M J (author). “Interactief hydrologisch computerprogramma, Hydrolin.” 1988. Thesis, Delft University of Technology. Accessed January 19, 2021.
http://resolver.tudelft.nl/uuid:37863941-5371-454c-9171-c5c75b5546ae.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Vos, M J (author). “Interactief hydrologisch computerprogramma, Hydrolin.” 1988. Web. 19 Jan 2021.
Vancouver:
Vos MJ(. Interactief hydrologisch computerprogramma, Hydrolin. [Internet] [Thesis]. Delft University of Technology; 1988. [cited 2021 Jan 19].
Available from: http://resolver.tudelft.nl/uuid:37863941-5371-454c-9171-c5c75b5546ae.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Vos MJ(. Interactief hydrologisch computerprogramma, Hydrolin. [Thesis]. Delft University of Technology; 1988. Available from: http://resolver.tudelft.nl/uuid:37863941-5371-454c-9171-c5c75b5546ae
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Arkansas
27.
Knierim, Katherine.
Stable Isotopes as a Tool to Characterize Carbon Cycling and Develop Hydrologic Budgets in Mantled Karst Settings.
Degree: PhD, 2015, University of Arkansas
URL: https://scholarworks.uark.edu/etd/1026
► Isotopes of water (δ2H/δ18O), carbon dioxide (δ13C-CO2), and dissolved inorganic carbon (δ13C-DIC) were used to explore water quality, trace carbon cycling, and quantify recharge…
(more)
▼ Isotopes of water (δ2H/δ18O), carbon dioxide (δ13C-CO2), and dissolved inorganic carbon (δ13C-DIC) were used to explore water quality, trace carbon cycling, and quantify recharge sources through mantled karst and into Blowing Spring Cave (BSC). Of the possible sources of contamination in the BSC recharge area, septic-tank effluent was hypothesized to degrade water quality at the spring outlet of BSC because of the dominance of septic tanks for waste treatment, unsuitable topography and soil for septic-tank absorption fields, increased nitrate and chloride concentrations concomitant with increased urbanization, and increased Escherichia coli with discharge. Carbon cycling between the soil and BSC was constrained by (1) mixing of gaseous soil CO2 and surface-atmosphere CO2 to produce cave-air CO2 concentrations and isotopic compositions, (2) kinetic degassing of cave drip-water, causing greater δ13C-DIC values than expected during equilibrium carbon isotopic fractionation between CO2 and DIC, and (3) exchange of soil-gas CO2 with groundwater prior to entering the cave, providing evidence that cave-stream water was characterized by open-system conditions with regards to soil CO2. This conceptual model of carbon cycling in BSC – where cave-air CO2 is partially sourced from soil CO2 and aqueous and gaseous carbon reservoirs within the cave are relatively decoupled – provides evidence that the majority of soil CO2 enters the cave as a gas. A three-component
hydrograph separation was completed to quantify precipitation (QR), soil water (QS), and bedrock-matrix water (QB) contributions to BSC during storm events. Antecedent moisture conditions changed throughout the sampling period because as rainfall and base-flow discharge increased, δ18O values of cave water increased, chloride concentration in soil and cave water decreased, and DIC in cave water decreased. Combined QS and QB accounted for 36 to 119% of total discharge during storm events, depending on time after the onset of precipitation and antecedent moisture conditions. QR was greatest during a wet-season storm and rapid dilution of major cations and anions occurred with increased discharge. In contrast, a dry-season storm had the lowest QR and anion concentration peaked with maximum QS. Even during extremely dry periods, pre-event water stored in the unsaturated zone can contribute to groundwater flow during storms.
Advisors/Committee Members: Phillip D. Hays, Ralph K. Davis, Matthew D. Covington.
Subjects/Keywords: Earth sciences; Carbon; Hydrograph; Isotopes; Karst; Ozarks; Fresh Water Studies; Geochemistry; Hydrology; Water Resource Management
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Export
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APA (6th Edition):
Knierim, K. (2015). Stable Isotopes as a Tool to Characterize Carbon Cycling and Develop Hydrologic Budgets in Mantled Karst Settings. (Doctoral Dissertation). University of Arkansas. Retrieved from https://scholarworks.uark.edu/etd/1026
Chicago Manual of Style (16th Edition):
Knierim, Katherine. “Stable Isotopes as a Tool to Characterize Carbon Cycling and Develop Hydrologic Budgets in Mantled Karst Settings.” 2015. Doctoral Dissertation, University of Arkansas. Accessed January 19, 2021.
https://scholarworks.uark.edu/etd/1026.
MLA Handbook (7th Edition):
Knierim, Katherine. “Stable Isotopes as a Tool to Characterize Carbon Cycling and Develop Hydrologic Budgets in Mantled Karst Settings.” 2015. Web. 19 Jan 2021.
Vancouver:
Knierim K. Stable Isotopes as a Tool to Characterize Carbon Cycling and Develop Hydrologic Budgets in Mantled Karst Settings. [Internet] [Doctoral dissertation]. University of Arkansas; 2015. [cited 2021 Jan 19].
Available from: https://scholarworks.uark.edu/etd/1026.
Council of Science Editors:
Knierim K. Stable Isotopes as a Tool to Characterize Carbon Cycling and Develop Hydrologic Budgets in Mantled Karst Settings. [Doctoral Dissertation]. University of Arkansas; 2015. Available from: https://scholarworks.uark.edu/etd/1026
University of Maryland
28.
Zhao, Tianming.
ANALYSES OF INFLUENTIAL FACTORS FOR ACCURATE DETERMINATION OF PEAK RATE FACTORS AND TIMES TO PEAK OF UNIT HYDROGRAPHS.
Degree: Civil Engineering, 2017, University of Maryland
URL: http://hdl.handle.net/1903/20437
► Despite the availability of a number of sophisticated hydrologic models, the unit hydrograph (UH) is still one of the most widely used models for computing…
(more)
▼ Despite the availability of a number of sophisticated hydrologic models, the unit
hydrograph (UH) is still one of the most widely used models for computing runoff hydrographs. The two-parameter gamma UH can be fully characterized by two parameters: the peak rate factor (PRF) and the time to peak (tpUH). Currently, obtaining accurate estimates of UH parameters is still a problem, especially for ungauged watersheds. The goal of this research was to analyze factors that influence estimates of UH parameters and to develop general guidelines that can assist in estimating UH parameters more accurately. A calibration model was developed for evaluating PRFs and tpUHs simultaneously from rainfall-runoff data. The effects of various influential factors were identified and investigated based on analyses of both synthetic and measured rainfall-runoff data. Results showed that the accuracy of calibrated UH parameters is affected by the rainfall characteristics, the time offset, the nonuniformity of rainfall, the extent of nonlinear watershed processes, and the flexibility of the gamma probability distribution function. Guidelines were developed to assist UH users in interpreting the calibration results and calibrating UH parameters more accurately.
Advisors/Committee Members: McCuen, Richard H. (advisor).
Subjects/Keywords: Civil engineering; Hydrologic sciences; Environmental engineering; Peak rate factor; Time to peak; Unit hydrograph
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APA ·
Chicago ·
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APA (6th Edition):
Zhao, T. (2017). ANALYSES OF INFLUENTIAL FACTORS FOR ACCURATE DETERMINATION OF PEAK RATE FACTORS AND TIMES TO PEAK OF UNIT HYDROGRAPHS. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/20437
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zhao, Tianming. “ANALYSES OF INFLUENTIAL FACTORS FOR ACCURATE DETERMINATION OF PEAK RATE FACTORS AND TIMES TO PEAK OF UNIT HYDROGRAPHS.” 2017. Thesis, University of Maryland. Accessed January 19, 2021.
http://hdl.handle.net/1903/20437.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zhao, Tianming. “ANALYSES OF INFLUENTIAL FACTORS FOR ACCURATE DETERMINATION OF PEAK RATE FACTORS AND TIMES TO PEAK OF UNIT HYDROGRAPHS.” 2017. Web. 19 Jan 2021.
Vancouver:
Zhao T. ANALYSES OF INFLUENTIAL FACTORS FOR ACCURATE DETERMINATION OF PEAK RATE FACTORS AND TIMES TO PEAK OF UNIT HYDROGRAPHS. [Internet] [Thesis]. University of Maryland; 2017. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/1903/20437.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zhao T. ANALYSES OF INFLUENTIAL FACTORS FOR ACCURATE DETERMINATION OF PEAK RATE FACTORS AND TIMES TO PEAK OF UNIT HYDROGRAPHS. [Thesis]. University of Maryland; 2017. Available from: http://hdl.handle.net/1903/20437
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
29.
Καραλέμας, Νικόλαος.
Ποιοτική και ποσοτική κατάσταση των υδατικών συστημάτων του ανατολικού Ταϋγέτου και της Μάνης και δυνατότητες βιώσιμης ανάπτυξης.
Degree: 2012, National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ)
URL: http://hdl.handle.net/10442/hedi/28607
► The objectives of this thesis are the geological and hydrogeological investigation of issues associated with the aforementioned water bodies. This research aims at the detailed…
(more)
▼ The objectives of this thesis are the geological and hydrogeological investigation of issues associated with the aforementioned water bodies. This research aims at the detailed analysis and understanding of the operation of these systems, with the intention of forming suitable suggestions for their appropriate exploitation, without changing their quality or quantitative status, in ways that can be integrated to the sustainable development of the region. A large part of this thesis focuses on the operation of the karstic springs, because they are related to the most important part of the water bodies of the area of study, i.e. the extended karstic rocks of eastern Taygetos. For this reason, extensive fieldwork was conducted, aiming at the determination of the recharge area of the springs, at the interpretation of their operation mechanism, at the periodic measurements of the most important springs and at the determination of various hydrochemical parameters of their waters. The values of the recession coefficients, which derived from the analysis of the hydrographs of the springs, range from 0,001 d⁻¹ to 0,0204 d⁻¹. For the area of Xerovouna, the infiltration coefficient of the carbonate rocks of the unit of Mani was calculated to reach approximately 50%.
Ο κύριος στόχος της διδακτορικής διατριβής είναι η γεωλογική και υδρογεωλογική έρευνα σε θέματα που σχετίζονται με τα υδατικά συστήματα του ανατολικού Ταϋγέτου και της Μάνης. Η έρευνα αποσκοπεί στη λεπτομερή γνώση και ανάλυση του τρόπου με τον οποίο λειτουργούν τα υδατικά συστήματα, ώστε να είναι δυνατόν να γίνουν προτάσεις με κύριο γνώμονα την ορθή εκμετάλλευση των υδατικών συστημάτων, με σκοπό να επικουρήσουν στη βιώσιμη ανάπτυξη της περιοχής, με παράλληλη διατήρηση της ποιοτικής και ποσοτικής τους κατάστασης. Ένα μεγάλο τμήμα της διατριβής, εξετάζει τη λειτουργία των καρστικών πηγών, καθώς σχετίζονται με το σημαντικότερο τμήμα των υδατικών συστημάτων της περιοχής έρευνας, δηλαδή με τις μεγάλες καρστικές μάζες του ανατολικού Ταϋγέτου. Πραγματοποιήθηκε εκτεταμένη εργασία υπαίθρου, με στόχο τον καθορισμό των περιοχών τροφοδοσίας των πηγών, την ερμηνεία των μηχανισμών λειτουργίας τους, την περιοδική μέτρηση των παροχών των περισσότερων και σημαντικότερων πηγών και τη μέτρηση διαφόρων υδροχημικών παραμέτρων των νερών τους. Οι τιμές των συντελεστών στείρευσης που υπολογίστηκαν από την επεξεργασία των υδρογραμμάτων εμφανίζουν εύρος από 0,001 d⁻¹ έως 0,0204 d⁻¹. Στο πλαίσιο της διατριβής, προσεγγίστηκε ο συντελεστής κατείσδυσης στους ανθρακικούς σχηματισμούς της ενότητας της Μάνης, με τη μέθοδο των πηγαίων εκφορτίσεων, και εκτιμήθηκε ότι είναι της τάξης του 50%.
Subjects/Keywords: Πηγές; Συντελεστής κατείσδυσης; Υδρόγραμμα; Ταΰγετος; Μάνη; Springs; Infiltration coefficient; HYDROGRAPH; Taygetos; Mani
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APA (6th Edition):
Καραλέμας, . . (2012). Ποιοτική και ποσοτική κατάσταση των υδατικών συστημάτων του ανατολικού Ταϋγέτου και της Μάνης και δυνατότητες βιώσιμης ανάπτυξης. (Thesis). National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ). Retrieved from http://hdl.handle.net/10442/hedi/28607
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Καραλέμας, Νικόλαος. “Ποιοτική και ποσοτική κατάσταση των υδατικών συστημάτων του ανατολικού Ταϋγέτου και της Μάνης και δυνατότητες βιώσιμης ανάπτυξης.” 2012. Thesis, National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ). Accessed January 19, 2021.
http://hdl.handle.net/10442/hedi/28607.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Καραλέμας, Νικόλαος. “Ποιοτική και ποσοτική κατάσταση των υδατικών συστημάτων του ανατολικού Ταϋγέτου και της Μάνης και δυνατότητες βιώσιμης ανάπτυξης.” 2012. Web. 19 Jan 2021.
Vancouver:
Καραλέμας . Ποιοτική και ποσοτική κατάσταση των υδατικών συστημάτων του ανατολικού Ταϋγέτου και της Μάνης και δυνατότητες βιώσιμης ανάπτυξης. [Internet] [Thesis]. National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ); 2012. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/10442/hedi/28607.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Καραλέμας . Ποιοτική και ποσοτική κατάσταση των υδατικών συστημάτων του ανατολικού Ταϋγέτου και της Μάνης και δυνατότητες βιώσιμης ανάπτυξης. [Thesis]. National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ); 2012. Available from: http://hdl.handle.net/10442/hedi/28607
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Georgia
30.
Mason-Deese, William French.
Modeling stormflow in ungauged basins.
Degree: 2014, University of Georgia
URL: http://hdl.handle.net/10724/29917
► This thesis presents a comprehensive model for predicting storm runoff and contributing areas based on precipitation and topography. Independent storms are defined using a procedure…
(more)
▼ This thesis presents a comprehensive model for predicting storm runoff and contributing areas based on precipitation and topography. Independent storms are defined using a procedure by Restrepo-Posada and Eagleson (1982) and stormflow is
defined with geochemistry. Recursive digital filters are compared and calibrated to geochemical hydrograph separation on Panola Mountain Research Watershed enabling the digital filters to be used to define stormflow on Coweeta Watershed 18. High
resolution topography of the watersheds, derived from LiDAR, is used to extract dense drainage networks. The networks predict surface runoff flow paths and the areas of a watershed that produce runoff. The mean lengths of streams of the networks are used
to parameterize the geomorphologic instantaneous unit hydrograph that is used to model storm hydrographs. Finally, modeled storm hydrographs are compared to observed and digitally filtered stormflow. Comparison of observed and modeled storms determines
if this model is suitable for ungauged basins.
Subjects/Keywords: Baseflow separation, Digital filters; Storm runoff; Stream networks; Geomorphologic instantaneous unit hydrograph
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Manager
APA (6th Edition):
Mason-Deese, W. F. (2014). Modeling stormflow in ungauged basins. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/29917
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mason-Deese, William French. “Modeling stormflow in ungauged basins.” 2014. Thesis, University of Georgia. Accessed January 19, 2021.
http://hdl.handle.net/10724/29917.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mason-Deese, William French. “Modeling stormflow in ungauged basins.” 2014. Web. 19 Jan 2021.
Vancouver:
Mason-Deese WF. Modeling stormflow in ungauged basins. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/10724/29917.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mason-Deese WF. Modeling stormflow in ungauged basins. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/29917
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
