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 10 of 10 for “"Total Maximum Daily Loads"”.
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Evaluation of the Development and Effectiveness of Copper Total Maximum Daily Loads (Tmdls) to Achieve Marine Water Quality Criteria
… quality standards, regulatory agencies establish Total Maximum Daily Loads (TMDLs) to reduce concentrations of toxic chemicals from entering waterways. A TMDL determines the maximum amount of pollutant loading a water body can sustain and still achieve water quality standards; they are developed …
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CLIMATE CHANGE IMPACTS ON THE SOIL EROSION AND NUTRIENT LOSSES IN THE GREAT LAKES REGION
… source pollution through the enforcement of total maximum daily loads (TMDL). Climate change may impact NPS pollutant transportation processes through influencing runoff
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Biophysical economic analysis of nutrient and sediment management practices in the Mississippi Alluvial Valley
… crop agriculture nutrient and sediment effluent loads. Best management practices help reduce row crop production environmental pollution. This dissertation looked at nutrient and tillage management practices that could help farmers address future total maximum daily loads (TMDLs) for the …
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Examining the Influence of Wildlife Population and Fecal Coliform Density Variability on Virginia Bacterial TMDL Development
… quality impairment in Virginia. Bacteria TMDLs (Total Maximum Daily Loads) for watersheds are typically created using a modeling approach. These models require characterization of all residential, agricultural, and wildlife sources of bacteria. Wildlife bacteria source characterization is …
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Sector-Targeting for Controlling Nutrient Loadings: A Case Study of the North Fork of the Shenandoah River Watershed
The main purpose of Total Maximum Daily Loads (TMDL) is to achieve a water quality standard. The economic costs of reducing nutrient loadings are often not taken into account during development. In this study, sector targeting is used to minimize the total cost of nutrient reduction by targeting …
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Potential and Quantification of Street Sweeping Pollutant Reductions towards addressing TMDL WLAs for MS4 Compliance
… achieve waste load allocations (WLAs) and meet total maximum daily loads (TMDLs). Street sweeping is potentially an effective BMP since streets exist throughout urban watersheds, often are directly connected to the storm sewer, and are found to contain an abundance of contaminants. Although …
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Development of hydrograph-based approach to modeling fate and transport of sediment-borne bacteria in lowland rivers
… of water quality restoration plans like Total Maximum Daily Loads, no single model has been widely recognized as an efficient and effective tool for estimating fecal pollution. This dissertation develops a simple yet effective modeling approach, called Hydrograph-based Approach, to …
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Turbidity and Nutrient Response to Storm Events in the Wissahickon Creek, Suburban Philadelphia, PA
… by the USEPA due to sediment and nutrients. Total Maximum Daily Loads (TMDLs) were implemented in 2003 for nutrients (NO3-, PO43-, NO2-, and CBOD5) and siltation. A new TMDL for total phosphorus (TP) was proposed in 2015, despite minimal data on the effectiveness of the 2003 TMDLs. This new …
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Identifying Sources of Fecal Pollution in the Appomattox River Watershed
… Virginia) for the development of bacterial Total Maximum Daily Loads (TMDLs). The Appomattox River watershed is primarily undeveloped with 70.8% of the land forested, 17.0% used for agriculture (mainly livestock production), and 7.7% classified as water, wetland or barren land. The remaining …
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Modeling the Effects of Acid Deposition and Natural Organic Acids on Surface Waters
… compared to the Adirondacks. I used the critical loads (CLs) and Total Maximum Daily Loads (TMDLs) to project reductions in atmospheric deposition loads that would provide healthy conditions for the fisheries of surface waters in these regions. These concepts are commonly used as tools for …