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 37 for “"Groundwater table"”.
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Agricultural adjustments to a falling groundwater table in central Arizona
… yielding high returns per acre-foot of water. Suitable land is abundantly available but groundwater appurtenant to these lands is becoming increasingly costly. Opportunities to grow high-value crops are subject to the vagaries of commodity markets and government programs. This study estimates the …
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The Water Table, Soil Moisture and Evapotranspiration Conditions Following the Removal of Conifers from Two Encroached Meadows
… assessed the effect of conifer removal on meadow groundwater. The goal of this study is to determine if the removal of conifers from an encroached meadow has an effect on depth to the groundwater table (WTD) and soil moisture content (SMC), and to investigate the accuracy and potential usefulness …
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Precipitation and Sea Level Rise Impacts on Groundwater Levels in Virginia Beach, Virginia
… processes despite the presence of a shallow groundwater table closely connected to them. SLR will continue to cause the groundwater table to increase in tidally influenced areas of Hampton Roads, and thereby decrease storage capacity of the unsaturated zone.</p> <p>This study investigates the …
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Effect Of Stream Channel Incision On The Depth To Groundwater In Riparian Corridors Across Southwestern Minnesota
… the potential to remove nitrogen from shallow groundwater in the riparian corridor. Streams with a higher degree of incision may be less likely to have elevated groundwater tables, making them less effective at removing nitrogen from groundwater. By determining if there is a relationship …
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Satellite remote sensing for improvement of groundwater characterisation
Groundwater, the water stored in the subsurface, plays an essential role in water provision for domestic, industrial and agricultural use. Groundwater is also vital for ecology and environment, since it provides base flow to many streams, rivers and wetlands. Groundwater demand in New Zealand has …
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Artificial recharge for conjunctive use in irrigation : the San Joaquin Valley, California
… is mainly governed by soil properties, depth to groundwater table, and spacing between two adjacent recharge areas. Under proper conditions, sufficient amounts of recharge water can store for agricultural purposes within a region. This study shows that total costs to construct, operate and …
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A study of infiltration trenches in unsaturated soil
… considering the capillary zone effect due to groundwater table. A computer program for hydrologic routing in infiltration trenches has been developed with the infiltration rate calculated based on a 3-dimensional cumulative infiltration equation. The 3-D cumulative infiltration equation …
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Assessment of river-groundwater interactions in the Barotse floodplain, Western Zambia.
… The main objective of this study was to evaluate groundwater-surface water interactions in the Barotse Floodplain. To achieve this objective, remote sensing was employed to identify perennial green vegetated areas with a shallow depth to groundwater table in the floodplain. Normalised Difference …
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Investigation into the plant ecology of the Karstland area in Namibia : with particular reference to the proposed large-scale abstraction of groundwater
The planned large-scale abstraction of groundwater from the Karst area in northern Namibia prompted concern with respect to possible negative effects on the plant ecology of that area. Although it was thought improbable that the lowering of the groundwater table would result in the deterioration of …
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VELAS: a fully-distributed daily hydrologic feedback model with emphasis on vegetation, land cover, and soil water dynamics
… models as it calculates infiltration and groundwater recharge by considering a time delay routing through a vadose zone down to the groundwater table. MODFLOW is adopted to simulate groundwater flow and interaction with surface water components as well. The model can be localized by simple …
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Complementary Effects of In-Stream Structures and Inset Floodplains on Solute Retention
… exchange during summer baseflow with a low groundwater table (~20% of the year), while floodplains only retained solutes during storm flow conditions (~1% of the year). �Flow through the hyporheic zone increased linearly with hydraulic conductivity, while residence times decreased …
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Water Hammer: An Analysis of Plumbing Systems, Intrusion, and Pump Operation
… which show that an unsteady approach is more suitable than the standard Hardy-Cross method. Residential plumbing systems are examined in this paper, household fixtures are modeled for their hydraulic functions, and several water hammer simulations are run using the Water Hammer and Mass …
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How Distance from Groundwater Affects the Water Status of Trees at San Marcos Springs
… a study at a site where the depth of a shallow groundwater table was indicated by the water level of a spring-fed lake and the distance of trees from groundwater was determined by their position on an escarpment above the lake. I tested the hypotheses that trees at higher elevations developed …
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Hydrology of a large unstable hillslope at Ebnit, Vorarlberg : identifying dominating processes and structures
… glacial and post-glacial processes formed an unstable hillslope. High yearly precipitation depths of about 2100 mm and rainstorms with both high intensities and precipitation depths govern surface and subsurface hydrological processes. Pressure propagation induced in hydrological active areas …
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Flood Processes in Semi-arid Streams: Sediment Transport, Flood Routing, and Groundwater - Surface Water Interactions
… die-offs with even shallow depletions of the groundwater table.
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Valuing critical zone services in intensively managed landscapes
… canopy to the weathering zone below the groundwater table. CZ services provide a measure to value processes that support the goods and services from landscapes. In intensively managed landscapes (IML), the provisioning, supporting, and regulating services are altered through anthropogenic …
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Simulation of hydrology and population dynamics of Anopheles mosquitoes around the Koka Reservoir in Ethiopia
… of HYDREMATS including a representation of the groundwater was coupled with a reservoir model to describe the spatiotemporal variability of the groundwater table, and the variability in shoreline locations. The entomology component was modified to match the relatively humid environment. …
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Surface spills at unconventional oil and gas sites: a contaminant transport modeling study for the South Platte alluvial aquifer
… or natural gas itself could potentially impact groundwater. Here, I present fate and transport simulations of aqueous fluid surface spills, the most likely pathway for groundwater contamination during oil and gas production operations, with four primary goals: (1) to evaluate whether or not …
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The role of topography in the emergence of African savannas
… suggest that the variation of the depth to water table induced by the varying elevation is highly correlated with the variation of soil moisture. Consequently, an asynchronous coupling of SHE and IBIS is designed to investigate the stated hypothesis. The coupling is performed by modifying IBIS to …
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