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Showing 1 to 20 of 36 for “"groundwater monitoring"”.
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Reliability-Based Groundwater Monitoring System Design
Detection monitoring systems composed of a single row of wells at different spacing and different distances from the contaminant source were evaluated. It is shown that, out of these systems, the optimal detection system is composed of closely spaced wells located near the source of contaminants. …
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Groundwater monitoring in three dimensions using the multi-level sampler
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1990.
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*Interactive Genetic Algorithms for Adaptive Decision Making in Groundwater Monitoring Design
… For example, application of IGAMII on BP's groundwater long-term monitoring case study in Michigan assisted the expert DM in finding 39 above-average designs from the expert's perspective. In comparison, Case Based Micro Interactive Genetic Algorithm (CBMIGA) and Standard Interactive Genetic …
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Striking the Balance: Long-Term Groundwater Monitoring Design for Multiple Conflicting Objectives
… face in the design process: (1) selecting monitoring objectives and (2) balancing these objectives. This thesis demonstrates that combining higher order Pareto optimization (i.e., optimizing a system for more than 2 objectives) with visualization can allow designers in any field to assess …
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Piezocone mapping, groundwater monitoring, and flow modeling in a riverine peatland : implications for the transport of arsenic
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1996.
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Analysis of Groundwater Monitoring of Residential Wells In the Vicinity of Carbon Limestone Landfill, Poland Township, Mahoning County, Ohio
This research analyzed test results of private groundwater wells within a one mileradius of the Carbon Limestone Landfill (CLL) located in Poland Township, MahoningCounty, Ohio, with the objective of determining the impact the CLL had on groundwaterquality over a sampling period of May 2003 – …
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Groundwater contamination at a landfill: a case study of coastal park landfill, Cape Town
The extent of groundwater pollution from landfills varies throughout the year. Studies have shown that rainfall is the greatest contributor to nutrient pollution in groundwater. Therefore, groundwater monitoring that is based on predetermined schedules and fails to consider the effects of rainfall, …
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INTEGRATED AQUIFER VULNERABILITY ASSESSMENT OF NITRATE CONTAMINATION IN CENTRAL INDIANA
Groundwater is not easily contaminated, but it is difficult to restore once contaminated. Therefore, groundwater management is important to prevent pollutants from reaching groundwater. A common step in developing groundwater management plans is assessment of aquifer risk using computational …
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Initial Wetland Hydrology and Vegetation Composition in Predicted Wetlands Adjacent to Lake Naconiche, Nacogdoches County, Texas
… in northern Nacogdoches County, included a monitoring project to demonstrate at least 176 acres of land adjacent to the lake would be converted into wetlands. The purpose of the study was to evaluate the creation of wetlands around the lake and establish a benchmark of vegetation composition …
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Augmenting Indiana's Groundwater Level Monitoring Network: Optimal Siting of Additional Wells to Address Spatial and Categorical Sampling Gaps
Groundwater monitoring networks are subject to change by budgetary actions and stakeholder initiatives that result in wells being abandoned or added. A strategy for network design is presented that addresses the latter situation. It was developed in response to consensus in the state of Indiana …
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Groundwater contamination by selenium, nitrate, coliform bacteria, and volatile organic compounds in the Las Vegas Valley, Nevada, shallow aquifer zone
A network of 27 shallow groundwater monitoring wells in the Las Vegas Valley, Nevada, was sampled for selenium, nitrate, coliform bacteria and 37 volatile organic compounds. A distinct pattern of elevated levels of selenium, nitrates, and chloroform was observed in the developed portions of the …
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Evidence of Hydro-Seismicity in the Tennessee Seismic Zone
… Well levels from 2 U.S. Geological Survey groundwater monitoring wells were also collected. Rainfall data were collected for the ETSZ. Reservoir, well and rainfall data were examined for correlation with earthquake occurrence rates. High Pearson correlation and anti-correlation coefficients …
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Groundwater quality assessment in the Ngaka Modiri Molema District using the Water Quality Index
In the conducted research, the groundwater quality of different boreholes located in the Ngaka Modiri Molema District (NMMD), more specifically Ratlou, Ditsobotla, and Tswaing local municipalities (LM), for drinking, livestock, and irrigation purposes were assessed. The obtained water quality …
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Hydrogeologic Model of a Leachate Plume in an Unconfined Coastal Plain Aquifer and Chemical Transport Mechanisms of Metals and Dense Non-Aqueous Phase Liquids
<p>Groundwater contamination is of increasing environmental concern as many aquifers across the globe have experienced a decrease in water quality in recent time. The growth of the world's population over the last couple of decades has caused a dramatic increase in the rate of groundwater use. One …
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Applicability of Stormwater Best Management Practices in the Virginia Coastal Plain
… on perennial surface water elevations and USGS groundwater monitoring data was developed to estimate the SHWT depth in Virginia Beach. The SHWT map was shown to be consistently more reliable than available predictions based on soil morphology, and was used as input to a BMP siting tool. The …
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Field Observations and Numerical Simulations of Groundwater Dynamics Within Cabretta Island, A Georgia Barrier Island
<p>The demand for knowledge of groundwater resources and nutrient exchange in coastal settings has increased in response to rapid population growth. I present field and numerical results that 1) provide a better understanding of groundwater dynamics during calm weather periods, and 2) investigate …
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A Study of the Changes in the Potentiometric Surface 1930-1986, Springfield Area, Missouri
… feet being lowered since 1974. The direction of groundwater flow is towards the center of the City of Springfield where the lowest groundwater elevations exist, while the highest elevations occur in the eastern portion of the study area, near Strafford and Rogersville. Potentiometric surface …
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Biodiversity assessment of groundwater-dependent ecosystems in Malta : evaluating copepods as bioindicators of groundwater health
This study investigates the biodiversity of groundwater-dependent ecosystems (GDEs) in Malta, focusing on copepods as bioindicators of groundwater health. Groundwater is essential in sustaining GDEs, yet these ecosystems remain underexplored, particularly in terms of local biodiversity. The aim of …
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Investigating the Water Budget and Subsurface Hydrology of Two Rain Gardens in Calgary, Alberta
… This study used water budget and subsurface monitoring techniques to investigate how two rain gardens performed as stormwater management tools in Calgary, Alberta. The Highland Park and Cambrian Heights rain gardens were monitored from May to October in 2023 and 2024, using data from natural …
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Climatic and hydrologic processes leading to recent wetland losses in Yellowstone National Park, USA
… each with an average of five shallow groundwater monitoring well-and-piezometer nests. To quantify historic wetland area I mapped hydric soils, analyzed aerial photographs, and identified geomorphic indicators of higher water. Vegetation was sampled to characterize wetlands and …
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