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 21 for “"submarine groundwater discharge"”.
-
Submarine Groundwater Discharge in the Southern Chesapeake Bay: Constraints From Numerical Models
… fluid flow 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 …
-
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 …
-
The design and testing of a procedure to locate fresh submarine groundwater discharge in Cyprus
… an experimental 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 …
-
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 …
-
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. …
-
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 …
-
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. …
-
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 …
-
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, …
-
The Distribution of Dissolved Barium Along the U.S. Geotraces North Atlantic Transect: Impact of Biogeochemical Processes, Circulation and Phase Association
… the continental slope of North America from a submarine groundwater discharge. Lastly, the error in the biogenic barium calculation from assuming a two phase model for particulate barium were assessed and showed the error from using an estimated Ba/Al ratio was prevalent, but minor, yet the …
-
Distribution and behavior of trace metals in the subterranean estuary of an Arctic coastal lagoon
… alter concentrations of chemical constituents of groundwater. With warming in the Arctic and the subsequent permafrost thaw, the relative importance of submarine groundwater discharge (SGD) to ocean chemical budgets will grow. In this study, we examined the distribution of select trace metals (Fe, …
-
Distribution and behavior of trace metals in the subterranean estuary of an Arctic coastal lagoon
… alter concentrations of chemical constituents of groundwater. With warming in the Arctic and the subsequent permafrost thaw, the relative importance of submarine groundwater discharge (SGD) to ocean chemical budgets will grow. In this study, we examined the distribution of select trace metals (Fe, …
-
Temporal variability in chemical cycling of the subterranean estuary and associated chemical loading to the coastal ocean
At the land-ocean interface, terrestrial groundwater interacts with seawater to form a subterranean estuary, which can play host to dynamic biogeochemical cycling of nutrients, trace metals and radionuclides. This chemically altered groundwater enters the ocean through submarine groundwater …
-
Temporal variability in chemical cycling of the subterranean estuary and associated chemical loading to the coastal ocean
At the land-ocean interface, terrestrial groundwater interacts with seawater to form a subterranean estuary, which can play host to dynamic biogeochemical cycling of nutrients, trace metals and radionuclides. This chemically altered groundwater enters the ocean through submarine groundwater …
-
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, …
-
Radium and mercury dynamics in the Arctic: investigating terrestrial inputs, groundwater discharge, and chemical cycling in a changing climate
… for 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 …
-
Radium and Mercury Dynamics in the Arctic: Investigating Terrestrial Inputs, Groundwater Discharge, and Chemical Cycling in a Changing Climate
… for 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 …
-
Investigation of salinity and nutrient characteristics of two groundwater based flow systems on Virginia's Eastern Shore
… which was confirmed by the direct measurement of submarine groundwater discharge (SGWD) using seepage meters. Upland wells contained high nitrate freshwater (>600μmol / 1 NO₃⁻, <1.0% salinity), while shallow (3.05m) wells located from the marsh-forest interface across the saltmarsh to Magothy Bay …
-
Groundwater transport of Escherichia coli bacteria to open surface waters on Virginia's Coastal Plain: a GIS approach
… transported through the soil and contaminate the groundwater. Submarine groundwater discharge (SGWD) may then be providing a conduit into the estuary for the bacteria. Data of OSWDS locations was not available, thus the groundwater transport mechanism was the focus of the study. A comprehensive …
-
The influence of surface - subsurface connectivity on groundwater flow and solute transport in a deltaic aquifer
Groundwater in coastal deltas provides sustainable water resources to almost five percent of the world’s population. However, it is threatened by multiple environmental issues including dense populations, urban development, and large-scale agricultural and industrial activities. The traditional …
Page 1 of 2