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.
Results
Showing 1 to 20 of 32 for “"groundwater pumping"”.
-
Modelling land subsidence due to groundwater pumping/recharging in the Las Vegas valley
… occurring in Las Vegas Spring Preserve due to groundwater level changes has been developed. A FORTRAN code that uses the finite element method has been prepared. The computer code calculates the hydraulic head in the aquifer resulting from pumping and recharging of the Wells The settlement or …
-
Groundwater Pumping Decisions and Land Subsidence in the Southern Chesapeake Bay Region of Virginia
… subsidence in the United States is a result of groundwater removal. Due to the hydrologic structure and reliance on the Potomac Aquifer, the Southern Chesapeake Bay region of Virginia has suffered from land subsidence since the 1940s. In coastal regions, land subsidence can increase the risk of …
-
A combined field analysis and modeling approach for assessing the impact of groundwater pumping on streamflow
… the interactions between stream water and groundwater is also critically important in regions where surface water and tributary groundwater are jointly administered under a prior appropriation doctrine, such as in the western United States. Of particular concern is the effect of a nearby …
-
Hard and soft cap groundwater allocations: a comparison of groundwater pumping restrictions on hydrologic and economic outcomes
"While groundwater is an important primary and supplementary source of water in the western United States, its overuse can lead to negative consequences such as stream depletion, seawater intrusion, or land subsidence. An increasing number of groundwater management districts are restricting …
-
Tradable permit systems for a spatially heterogeneous externality: A microparameter approach
The reduction of surface water flows by adjacent groundwater pumping is an externality caused by agricultural producers. Previous studies have analyzed management policies for such externalities, but these have assumed that the ability to monitor stream depletion is perfect and the ability to …
-
Evaluation of Capture Analysis Bias Associated with Use of Nonlinear Groundwater Flow Models
… western U.S. typically recognizes surface and groundwater as different sources of water. Because these two systems are often truly connected, groundwater pumping can deplete surface water and is contributing to more frequent litigation by surface water right holders. Surface and groundwater …
-
Spatial dynamic groundwater regulation to ensure adequate instream flows for salmon
… often involve the need to restrict the use of groundwater pumping in irrigated agriculture in order to leave adequate quantities of water for fish species in nearby streams. Groundwater pumping can lead to a reduction in instream flows of nearby streams in a process known as stream depletion. …
-
Base Flow Recession Analysis for Streamflow and Spring Flow
… streams dominate the flowing streams and groundwater hydraulics governs the recession behavior. The ephemeral stream densities vary from arid regions to humid regions. Therefore, the characteristics of transition flow across the climate gradients are also tested in 40 watersheds. It is …
-
Seepage Rates in Closed Basins
… cm/d for a natural lake located close to a groundwater pumping site, and 0.4 cm/d for another natural lake with no groundwater pumping in the proximity. Two methods to estimate seepage rates into semi-confined aquifers were compared: (a) mass balance approach and (b) Darcy's equation. At one …
-
Development of a Groundwater Flow Model for Hungry Valley, Washoe County, Nevada
… of the community is dependent on sustainable groundwater development. Previous hydrogeologic assessments and pumping tests have consistently concluded that the aquifers are of limited extent. The aquifers are characterized by low transmissivities with storativity values indicating the aquifers …
-
Three papers in regional economics: energy productivity convergence, water resource planning, and workforce occupation-industry dynamics
… of ways. However, in some areas, excessive groundwater pumping exacerbates the already critical pressure on streamflow and needs to be managed through effective planning. Based upon economic and hydrogeological concepts, this paper calculates the amount of streamflow depletion due to …
-
COMMUNITY STRUCTURE AND FUNCTIONAL DIVERSITY OF IMPERILED GREAT PLAINS FISHES: IMPLICATIONS FOR CONSERVATION OF TWO ENDANGERED SHINERS (SHARPNOSE SHINER NOTROPIS OXYRHYNCHUS AND SMALLEYE SHINER NOTROPIS BUCCULA) IN THE UPPER BRAZOS RIVER, TEXAS
<p>Anthropogenic practices such as groundwater pumping, land use change, and the implementation of dams have caused significant change in freshwater ecosystems, especially in the Great Plains of North America where pelagic broadcast spawning fish species are declining due to the loss of the natural …
-
Field Investigation of Stream-Aquifer Interactions: A Case Study in Coastal California
… The aquifer is an important source of groundwater for cropland irrigation and for aquatic ecosystem support. The potential for groundwater pumping to deplete Scotts Creek stream flows is a source of serious concern for land managers, fisheries biologists, and regulatory agencies due to …
-
Hydrologic and hydraulic assessment of artificial recharge in the Sparta Aquifer of Union County, Arkansas
Groundwater pumping from the Sparta aquifer in Union County, Arkansas, has long exceeded natural recharge, threatening the regional water supply. An alternative water-supply project, completed in 2004, now provides treated surfacewater to local industries. This conjunctive use of surface- and …
-
Remote sensing for detecting rapid post-fire recovery as Groundwater-Dependent Ecosystems in the Cape Floristic Region
Groundwater Dependent Ecosystems (GDEs) concentrate high levels of biodiversity and several species not found anywhere else. They prevail in the landscape through the ecological contribution of groundwater. They, GDEs, are vulnerable to drastic changes in groundwater depth. If, for example, bulk …
-
GROUNDWATER WITHDRAWAL ESTIMATION USING INTEGRATED REMOTE SENSING PRODUCTS AND MACHINE LEARNING
… various critical components affecting the globe. Groundwater, which comprises the world's 30% freshwater, is one such key component of the global water resources and supplies nearly half of the global drinking water.</p> <p>Despite groundwater overdraft in many parts of the world, including the …
-
Coupling tough2 and SEAWAT variable-density models to understand potential geologic carbon sequestration impacts on groundwater resources
… while SEAWAT is suitable for variable density, groundwater flow problems. Rather than using a single TOUGH2 model, coupling SEAWAT and TOUGH2 lowers the computational cost of modeling this system, allowing the impacts of the GCS project (increasing formation pressure) and groundwater pumping …
-
Analysis of a Multi-Aquifer System in the Southern Coastal Plain of Virginia by Trial and Error Model Calibration to Observed Land Subsidence
… with aquifer compaction from excessive groundwater pumping. Detailed time-series of cumulative compaction data (land subsidence) from the three U.S. Geological Survey deployed extensometers in the regions, along with cyclical piezometer data, reflect the nature of the complex …
-
Land Rebound and Preconsolidation Head in the Houston Ship Channel Area
… land subsidence resulting from excessive groundwater pumping has occurred in and around Houston, Texas for nearly a century. Hydraulic heads in much of the region have been recovering steadily since the mid-1970s following the efforts of local organizations to regulate groundwater …
-
Infrastructure planning for drought mitigation under climate change
… for Frenchman Creek Basin (FCB), where groundwater based irrigation plays a significant role in agriculture production and local hydrological cycle. The model, revised from the Soil and Water Assessment Tool (SWAT), simulates the dynamic response of aquifer and base flow to groundwater …
Page 1 of 2