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 58 for “"groundwater discharge"”.
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Water Quality and Groundwater Discharge in the Halton Region
… data and its application for identifying groundwater discharge on a watershed-to-site-specific scale. In the second chapter of this thesis, field data from 2022 revealed significant variations in major and trace solute concentrations, not only between and within catchments but also over …
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Submarine Groundwater Discharge in the Southern Chesapeake Bay: Constraints From Numerical Models
… within the coastal zone to produce submarine groundwater discharge (SGD). Groundwater flowing from the seabed serves as a significant pathway for contaminants and nutrients, producing an active biogeochemical reaction zone. In order to quantify the importance of SGD in geochemical and …
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Characterizing Groundwater Discharge from a Cobble Armored Streambed, Alder Creek, Ontario, Canada
Quantifying flow across the groundwater-surface water interface (GWSWIn) is necessary for a detailed understanding of the hydrological connectivity between groundwater and surface water, and for the effective management of water resources in general. Fluxes across the GWSWIn can be used to monitor …
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A radiocarbon method and multi-tracer approach to quantifying groundwater discharge to coastal waters
Groundwater discharge into estuaries and the coastal ocean is an important mechanism for the transport of dissolved chemical species to coastal waters. Because many dissolved species are present in groundwater in concentrations that are orders of magnitude higher than typical river concentrations, …
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Marine resistivity as a tool for characterizing groundwater discharge zones at Lake Lacawac, PA
Understanding the groundwater-surface water exchange zones of lakes and streams is a key element in predicting water supply sustainability and dealing with water contamination issues. Spatial variability makes seepage zones hard to locate using traditional point sampling methods. The goal of this …
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Contribution of Submarine Groundwater Discharge to Select Biogeochemical Fluxes in St. Louis Bay, Mississippi
<p>This thesis assesses the role of submarine groundwater discharge (SGD) in St. Louis Bay, Mississippi. Located along the northern Gulf of Mexico, St. Louis Bay (SLB) is a semi-enclosed bay that is important to the local area for recreation and tourism. SGD is the movement of any water into the …
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A radiocarbon method and multi-tracer approach to quantifying groundwater discharge to coastal waters
Groundwater discharge into estuaries and the coastal ocean is an important mechanism for the transport of dissolved chemical species to coastal waters. Because many dissolved species are present in groundwater in concentrations that are orders of magnitude higher than typical river concentrations, …
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The design and testing of a procedure to locate fresh submarine groundwater discharge in Cyprus
… procedure for identifying fresh submarine groundwater discharge (SGD) in Cyprus. SGD is a flow of water from coastal aquifers into the ocean driven by a hydraulic gradient and other forces. Understanding SGD is crucial for informed groundwater management. In some cases, SGD creates …
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Monitoring pesticides in the soil, groundwater, and submarine groundwater discharge of the Chesapeake Bay Area
… if pesticides were leaching into the shallow groundwater beneath agricultural sites, and if so, to determine a correlation between soil and groundwater pesticide concentrations. The second was to examine the correlation between pesticide concentrations measured by gas chromatography with …
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Monitoring pesticides in the groundwater and submarine groundwater discharge of the Eastern Shore of Virginia
… from the place of application by the shallow groundwater and discharged into the Chesapeake Bay and Atlantic Ocean, and quantify the pesticides if they were transported. One reference (undeveloped) and four agricultural sites were tested over a 11 month period from April 1992 to February 1993. …
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A geographic information system analysis of submarine groundwater discharge on the eastern shore of Virginia
Recent research has indicated that submarine groundwater discharge (SGWD) occurs in the Chesapeake Bay, and that discharged groundwater can be contaminated with nutrients and toxic substances. Although discharge has been measured directly on a local level, a convenient method for determining the …
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A Conceptual Model for the Development and Persistence of Soap Holes (Unique Prairie Groundwater Discharge Features)
… are largely unknown, despite being inferred as groundwater discharge phenomena on the Alberta prairies over 50 years ago. Here, the first conceptual model for soap hole development and persistence is created using time-series hydraulic and temperature data, electrical resistivity tomography, …
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Seasonal dynamics in costal aquifers : investigation of submarine groundwater discharge through field measurements and numerical models
The fresh and saline groundwater flowing from coastal aquifers into the ocean comprise submarine groundwater discharge (SGD). This outflow is an important pathway for the transport of nutrients and contaminants, and has been shown to adversely affect coastal ecosystems in many areas of the world. …
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Radium and mercury dynamics in the Arctic: investigating terrestrial inputs, groundwater discharge, and chemical cycling in a changing climate
… tracking and quantifying riverine and submarine groundwater discharge (SGD) of species like Hg into the Arctic Ocean. This thesis employs seasonal data and laboratory experiments to investigate the factors influencing terrestrial Ra inputs to the Arctic Ocean, quantifies SGD and associated Hg …
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Radium and Mercury Dynamics in the Arctic: Investigating Terrestrial Inputs, Groundwater Discharge, and Chemical Cycling in a Changing Climate
… tracking and quantifying riverine and submarine groundwater discharge (SGD) of species like Hg into the Arctic Ocean. This thesis employs seasonal data and laboratory experiments to investigate the factors influencing terrestrial Ra inputs to the Arctic Ocean, quantifies SGD and associated Hg …
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Quantifying groundwater discharge using thermal imagery and conventional groundwater exploration techniques for estimating the nitrogen loading to a meso-scale inland estuary
… presents the results of a study to evaluate groundwater inflow and nutrient loadings to the Great Bay Estuary, New Hampshire. The evaluation of inflow was accomplished independently by two methods: one, used thermal imagery, and the other, piezometric mapping. The thermal imagery method …
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Holocene sedimentary and aquatic biogeochemical responses reflected in Ordy Pond, Oahʻu, Hawai'i, and, contemporary modeling of submarine groundwater discharge in Kahana Bay, Oahʻu, Hawaiʻi
… while Kahana Bay is influenced by significant groundwater and surface water influx and mixing with coastal ocean water. Thus, Ordy Pond is a better tool for studying Oahu's paleoenvironments, and Kahana Bay demonstrates the applicability of natural chemical tracers to quantify submarine …
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Estuarine sediment nutrient exchange: the importance of physical transport mechanisms and benthic micro-communities
… water transport and subsequently influenced by groundwater discharge to a greater degree than less permeable organic silt-clay sediments. Sediment ammonium and dissolved inorganic phosphorus (DIP) fluxes were strongly dependent on benthic aerobic respiration rates for silt-clay sediments as …
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Investigating nitrate attenuation in an urban stream using stable isotope geochemistry and continuous monitoring
… the relative influences of tributary dilution, groundwater discharge, and biological processing on nitrate concentrations in an urban stream during high and low flow periods. A wastewater treatment plant (WTP) on Pennypack Creek, an urban stream near Philadelphia, PA, increases nitrate …
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