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 62 for “"Groundwater levels"”.
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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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The influence of groundwater management strategies on groundwater levels of Namibian savannah aquifers
… potential evaporation rates beyond 2000 mm/year. Groundwater therefore quickly becomes crucial, most of which is located in aquifers in the savannah biome which covers a large part of the country. This is also where most industrialization as well as most farming is practiced. It is however unknown …
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Groundwater levels as affected by swine waste lagoons in high water table soils
… units could possibly cause contamination of groundwater in the surrounding area due to infiltration from the lagoons to the water table. The deep aquifer in this area is a good potable source of water. Its low concentrations of minerals make it feasible for both private and industrial use. …
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A GIS Approach to Modeling Groundwater Levels in the Mississippi River Valley Alluvial Aquifer
<p>Groundwater depletion, a subject of growing concern for a significant portion of Arkansas, may lead to future economic challenges for the Arkansas Delta region. The Mississippi River Valley Alluvial Aquifer is the uppermost aquifer and features the largest groundwater capacity in the Mississippi …
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Time series modelling of groundwater levels in a selected semi-arid catchment within Vhembe District Municipality, South Africa
This study is aimed at modelling groundwater levels in a semi-arid catchment within Vhembe District Municipality, South Africa. Auto Regressive Integrated Moving Average (ARIMA) model and Seasonal Auto Regressive Integrated Moving Average with eXogenous variables (SARIMAX) model were used to model …
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Development of risk-based groundwater operating rules: a case study of Siloam Village, South Africa
This study developed operating rules for groundwater supply from a probabilistic (risk-based) approach. Groundwater supply systems are often operated without relating groundwater yield/availability to demand which makes groundwater resource planning and management challenging and unpredictable. …
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Groundwater Thresholds for Root Decomposition and the Relation to Barrier Island Ecological State Changes
… at 32 elevations in relation to mean annual groundwater levels (-0.356 – 1.937 m). Negative exponential decay rates (k = 0.310 – 0.915 yr<sup>-1</sup>) varied according to average distance to the freshwater free surface, with lowest decay occurring in low elevation/anoxic conditions (marsh, …
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Statistical analysis of rainfall and groundwater trends and their spatial variations in the Mopani District, South Africa
This study analysed rainfall and groundwater level trends and variations in the Mopani District, Limpopo of South Africa to guide sustainable water resource strategies, improve decision- making, drought assessments, and climate adaptation strategies. The methodology involved a two-phase approach, …
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A hydrogeological-economic modelling approach to dryland salinity in the North Stirling Land Conservation District, Western Australia
Associated with the problems of rising groundwater levels and dryland salinity are the conflicting economic and environmental objectives which aim to maximise net revenue from agriculture whilst still conserving the ecological standards of the natural environment. From an economic perspective, the …
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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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Groundwater management using a GIS case study : Uitenhage Subterranean Government Water Control Area
… forms the centre of one of the biggest artesian groundwater basins in South Africa. The Table Mountain Group quartzitic sandstones are overlain by a thickness of postPalaeozoic sediments giving rise to artesian groundwater. The most wellknown of this manifestation are the springs at Uitenhage …
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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 …
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Integrating institutional and local decision-making with emergent environmental phenomena: the case of the Republican River Basin
… simulate emergent environmental phenomena (i.e. groundwater levels, stream flow, etc.) through a coupled agent-based model by assigning simple rules governing decision making to local institutions and farmers. The case of the Republican River Basin, a heavily utilized agricultural region with …
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Spatial and Temporal Variability of Subsidence: Fort Bend County, Texas
… in southeast Houston, coincident with aquifer levels recovering to approximately 30 meters below land surface. FBC, located west of Houston, was chosen to study the early drivers of subsidence. GPS stations co-located with monitoring wells across the county indicate that periodic subsidence can …
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Ecohydrology of a riparian woodland along the Oldman River, Alberta
… river-soil-plant-atmosphere continuum, river and groundwater levels and precipitation were monitored; sap flow was continuously measured with thermal dissipation probes in eight trees and stomatal conductance and leaf water potential were measured monthly; and weather conditions were monitored. …
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FORECASTING GROUNDWATER RESPONSES TO DAM REMOVAL
… dissertation contains three papers describing groundwater system responses to dam removals and presents current and new methodologies that managers can use to proactively forecast and mitigate those impacts. The three papers bring together literature, data gathering, data analysis, testing, and …
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FORECASTING GROUNDWATER RESPONSES TO DAM REMOVAL
… dissertation contains three papers describing groundwater system responses to dam removals and presents current and new methodologies that managers can use to proactively forecast and mitigate those impacts. The three papers bring together literature, data gathering, data analysis, testing, and …
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Do private water tankers in Bangalore exhibit "mafia-like" behavior?
… However, tankers do contribute to declining groundwater levels and government intervention on these grounds ought to be explored.
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Reduzierung von Fremdwasser bei der Abwasserentsorgung
… in sewer systems. Predominantly it consists of groundwater infiltration over leakages in public and/or private sewers and drain pipes as well as the rainfall induced inflow into sanitary sewers. It leads to an additional hydraulic charge, a reduced efficiency of wastewater treatment plants and …
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Three Dimensional Modeling Of Wekiva Springshed With Wash123d
This thesis presents a three-dimensional groundwater modeling of Wekia springshed in central Florida using a numerical model, WASH123D. Springs have historically played an important role in Florida's history. The Wekiva River is a spring-fed system associated with about 19 springs connected to the …
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