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 403 for “"surface waters"”.
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Estimating Bacterial Loadings to Surface Waters from Agricultural Watersheds
… bacteria and pathogens are a major source of surface water impairment. In Virginia alone, approximately 73% of impaired waters are impaired due to fecal coliforms (FC). Because bacteria are a significant cause of water body impairment and existing bacterial models are predominantly based upon …
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Exposure Assessment of Mercury in Fish from Kentucky Surface Waters
… through consumption of fish from Kentucky surface waters. The exposure assessment is based on data collected by the Kentucky Department for Environmental Protection (KDEP), Division of Water, from different streams and lakes in Kentucky and average consumption rates defined by the U.S. …
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Procedure to Quantify Environmental Risk of Nutrient Loadings to Surface Waters
Agricultural production and human activities in a watershed can expose the watershed to environmental degradation, pollution problems, and a decrease in water quality if resources and activities within a watershed are not managed carefully. In order to best utilize limited resources and maximize …
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Pharmaceutical occurrence, distribution and degradation in rural wastewaters and surface waters in Scotland
… products (TPs) and metabolites) entering surface water. Knowledge gaps exist on pharmaceutical presence and potential effects in rural regions (e.g., Scotland’s Highlands and Islands), where historic monitoring has been limited. These areas may face challenges relating to wastewater …
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Modeling the Effects of Acid Deposition and Natural Organic Acids on Surface Waters
… of sulfuric and nitric acids has impacted surface waters in the eastern U.S. Controls on anthropogenic S and NOx emissions have resulted in a substantial decrease in acid deposition. Long-term measurements of surface water chemistry indicate contrasting responses of surface waters to this …
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Geochemically tracing the intermediate and surface waters in the Tasman Sea, southwest Pacific
The relatively understudied intermediate waters of the world have been implicated as an important part of the global ocean circulation. This thesis discusses the intermediate waters of the Pacific over space and time. Initially, by using geochemical tracers to look at the present distribution, …
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Geochemically tracing the intermediate and surface waters in the Tasman Sea, southwest Pacific
The relatively understudied intermediate waters of the world have been implicated as an important part of the global ocean circulation. This thesis discusses the intermediate waters of the Pacific over space and time. Initially, by using geochemical tracers to look at the present distribution, …
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Removal of dissolved organic matter from surface waters by coagulation with trivalent iron
… distributions of natural DOC in raw and treated surface waters were investigated to determine the types of organic compounds removed by coagulation and settling. The distribution of organic precursors that react with chlorine to form organic halide compounds was also determined, along with the …
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The myth of communities. Determining ecological quality of surface waters using macroinvertebrate community patterns.
Contains fulltext : 27553.pdf (Publisher’s version ) (Open Access)
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Qualitative and quantitative analyses of Lake Baikal's surface-waters using ocean colour satellite data (SeaWiFS)
… spatial and seasonal information about the surface waters of Lake Baikal (Siberia). While discrete limnological field data is available, the spatial extension of Lake Baikal is enormous (ca. 600 km), while the field data are limited to selected sites and expedition time windows. Therefore, …
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The Vernal And Summer Zooplankton In Surface Waters From A Small Cove In Stockton Reservoir
Zooplankton collections were made at three sites in the Little Sac arm of Stockton Reservoir, Missouri, from May 11, 1975 until July 19, 1975 and from ten sites along the entire Little Sac arm on June 10, 1976. A total of 12 species of zooplankton were collected. Diurnal, seasonal, and among site …
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Evaluating and remediating metals and arsenic in surface waters of the Northern Cheyenne Reservation, Montana
… Cheyenne people. Trace metal content of the surface waters on the reservation have not been adequately studied. Providing baseline data for future reference for the Tribe will be beneficial for their future studies of impacts to Tribal natural resources. This paper analyzes arsenic and heavy …
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Evaluating and remediating metals and arsenic in surface waters of the Northern Cheyenne Reservation, Montana
… Cheyenne people. Trace metal content of the surface waters on the reservation have not been adequately studied. Providing baseline data for future reference for the Tribe will be beneficial for their future studies of impacts to Tribal natural resources. This paper analyzes arsenic and heavy …
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Movement and trophic ecology of large pelagic fishes connecting surface waters with the Ocean’s Twilight Zone
… of the global ocean that lies between the sunlit surface waters and perpetually dark midnight zones, covering depths from ~200 to 1000 meters. Recent work in the twilight (or mesopelagic) zone has revealed unexpected biomass and diversity that may not only challenge scientific understanding of …
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Evaluation of agricultural beneficial management practices: Cattle access restriction to surface waters subsurface tile drainage management
… system and an excluding pasture system on surface water quality. The three year study compared water quality endpoints such as: indicator bacteria, pathogens, parasites and nutrients between treatments. Microbial source tracking indicated that livestock was the main source of fecal …
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Movement and Trophic Ecology of Large Pelagic Fishes Connecting Surface Waters with the Ocean's Twilight Zone
… of the global ocean that lies between the sunlit surface waters and perpetually dark midnight zones, covering depths from ~200 to 1000 meters. Recent work in the twilight (or mesopelagic) zone has revealed unexpected biomass and diversity that may not only challenge scientific understanding of …
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