Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 97 for “"Groundwater Recharge"”.
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Estimating groundwater recharge in Jinci karst groundwater system, North China
… 25% of the world’s population relies on karst groundwater as the primary source for drinking and irrigation. However, due to the global climate change as well as population expansion, the contradictory between supply and demand of water resource becomes more and more pronounced. Karst …
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Modeling Artificial Groundwater Recharge in the Santa Rosa Creek Watershed
… land and the town of Cambria. Historically the groundwater within the Santa Rosa Creek Watershed has been used for irrigation, municipal and domestic uses, and the creek is critical habitat steelhead trout. During dry years, there is less water for all uses. When low groundwater levels occur, …
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Probabilistic estimation and prediction of groundwater recharge in a semi-arid environment
Quantifying and characterizing groundwater recharge are critical for water resources management. Unfortunately, low recharge rates are difficult to resolve in dry environments, where groundwater is often most important. Motivated by such concerns, this thesis presents a new probabilistic approach …
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A Comparison of Four Methods to Estimate Groundwater Recharge for Northeastern South Dakota
<p>The rate of groundwater recharge is one of the most important elements in the analysis and management of groundwater resources. In addition, it is also the most difficult quantity to determine. This thesis, which is the result of a study made in northeastern South Dakota, presents an overview of …
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Geochemistry of artificial groundwater recharge into the Kopoasfontein breccia pipe near Calvinia, Karoo
Artificial groundwater recharge has been proposed as an innovative strategy for managing the scarce water supplies of the town of Calvinia, near the edge of the Karoo, South Africa. Surplus runoff water from the town dam or groundwater from boreholes in weathered shale aquifers would be injected …
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Identification of potential groundwater recharge zones: a case study of KwaZulu-Natal, South Africa
… resources, hence calling upon the development of groundwater resources. This study combined the use of GIS and remote sensing to demarcate groundwater potential recharge zones in the uMhlathuze catchment and Maputaland region using various pertinent parameters. The AHP approach and Catastrophe …
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Model Estimation of Depression-focused Groundwater Recharge and its Variability in the Canadian Prairies
… region by storing runoff water and replenishing groundwater through focused infiltration termed as depression-focused groundwater recharge. This study investigated the spatial distribution of depression-focused groundwater recharge in Alberta and Saskatchewan using a soil-water-balance model …
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Physical Investigation of Field Scale Groundwater Recharge Processes in the Virginia Blue Ridge Physiographic Province
… Site in Floyd County, Virginia indicate that recharge rates to the subsurface are controlled by a small scale thrust fault associated with regional thrust faulting within the Blue Ridge Province. Recharge rates appear to be correlated to spatial variation in the hydraulic conductivity of the …
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An economic and institutional assessment of groundwater recharge in an arid environment: Tucson Basin case study
… region, faces escalating pressure on its groundwater resources associated with rapid urbanization and population growth over tbe past 50 years. Because of concern that the declining water table will threaten the city's development, bringing water from Colorado River via the Central Arizona …
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Spatial and Temporal Distribution of Groundwater Recharge in the West Bank Using Remote Sensing and GIS Techniques
Estimating groundwater recharge to aquifer systems is a very important element in assessing the water resources of the West Bank. Of particular interest is the sustainable yield of the aquifers. Previous studies have developed analytical recharge models that are based on the long-term annual …
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Estimation of groundwater recharge along a precipitation gradient for Savannah aquifers in Namibia with special emphasis on the impact of vegetation
The quantification of groundwater resources is essential especially in water scarce countries like Namibia as well as the assessment of the influence of vegetation on groundwater recharge for a better management and sustainability of savannah aquifers. This study has two specific objectives which …
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Measurement and Simulation of Preferential Flow in Frozen Soils
… flow on snowmelt-driven infiltration and groundwater recharge. Results showed that preferential flow enabled relatively large amounts of snowmelt infiltration when the soil was still frozen, but that refreezing of infiltrated meltwater during winter snowmelt events progressively reduced …
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Groundwater quantity and quality assessment for aquifer recharge in Ohangwena region, Namibia
… pressure on the local water balance. As groundwater demands increase and availability declines, sustainable groundwater management is required for the Ohangwena region. This thesis assessed the suitability of using runoff for aquifer recharge to augment groundwater in the Ohangwena region …
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Transition to Novel Internet of Things Technology for Management of Groundwater Resources? Case of Cape Town, South Africa
Groundwater is significant for humans and nature due to its varying extent, prevalence and natural quality. Effective management and protection of groundwater resources is essential and requires detailed knowledge and quantitative/qualitative characterisation of the aquifer. It is vital to confirm …
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Evaluating Preferential Recharge in Blue Ridge Aquifer Systems Using Saline Tracers
… to explore the role of geologic structure on groundwater recharge at the Fractured Rock Research Site in Floyd County, Virginia. Tracer migration was monitored through soil, saprolite, and fractured crystalline bedrock for a period of 3 months with chemical, physical, and geophysical …
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Method for Recharge and Sustainable Groundwater Use Estimation Using Soil Moisture Time-Series Analysis
Accurately estimating groundwater recharge is essential for sustainable aquifer management, yet remains difficult to measure directly, especially at large spatial scales. This thesis presents a method to estimate recharge using soil moisture drydown dynamics—the period following precipitation …
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ΥΔΡΟΓΕΩΛΟΓΙΚΗ ΕΡΕΥΝΑ ΥΠΟΛΕΚΑΝΗΣ ΚΑΛΑΜΠΑΚΑΣ (ΔΥΤ. ΘΕΣΣΑΛΙΑ)
… DETERMINED THROUGH PUMPING-TESTS AND THEGROUNDWATER RESERVES WERE ASSESSED. THE HYDROCHEMICAL CHARACTER OF GROUNDWATER WAS STUDIED IN RELATION TO ITS SUITABILITY FOR DIFFERENT USES. FINALLY, THEMECHANISM OF GROUNDWATER RECHARGE WAS CLARIFIED AND A PROGRAM OF GROUNDWATER EXPLOITATION WAS …
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Assessment of groundwater vulnerability to pesticide contamination in Albemarle and Louisa counties, Virginia
Groundwater contamination potential by pesticide was evaluated in Albemarle and Louisa counties of the Thomas Jefferson Planning District in Virginia. A qualitative method was developed to perform an assessment of pesticide contamination potential, using an existing pesticide screening model. The …
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