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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 38 for “"Total Maximum Daily Load"”.
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An Uncertainty-Based Approach to the Total Maximum Daily Load Development
… approach is developed to the estimation of the total uncertainty-based Margin of Safety (MOS) for Total Maximum Daily Load calculations using the watershed modeling tool HSPF. In order to determine the prior, likelihood, and posterior distributions of uncertainties involved in Bayesian approach, …
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Improving total Maximum Daily Load Implementation and Utilization Using Adaptive Management Strategies
… to produce an Adaptive Management Strategy for Total Maximum Daily Load (TMDL) Implementation. This research provided a basic look at finding possible strategies that may help the TMDL program work more efficiently. The purpose was to create a framework that improves the existing TMDL framework. …
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Monitoring of Selected Bacteriological Parameters Associated with the Sinking Creek Total Maximum Daily Load (TMDL).
… were monitored monthly and concentrations of total coliforms, fecal coliforms, and selected physical water quality parameters measured. Fecal coliform concentrations were >1000 CFU/100 ml at sites 1 through 4, and <400 CFU/100 ml, at all other sites indicating significant inputs between sites …
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The Use of Selected Water Quality Parameters to Identify Fecal Coliform Sources in Support of the Sinking Creek Total Maximum Daily Load.
… water quality standards for recreation. A Total Maximum Daily Load (TMDL) for fecal coliforms was developed. The purpose of this study was to investigate the use of water quality parameters to identify areas that contribute to the fecal coliform loading. Concentrations of nitrate-N, …
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Locally derived nonpoint loading estimates for the Boeuf River/Bayou Lafourche watershed
… be used to quantify nonpoint source pollutant loads from different land-use types. The Louisiana Department of Environmental Quality (LDEQ) is in the process of implementing management programs for impacted water bodies based on the Total Maximum Daily Load (TMDL) of a pollutant. Pollutants of …
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Performance Analysis of the Ashby Stormwater Retention Pond in Fairfax City, Virginia
… Chesapeake Bay Watershed is subject to Total Maximum Daily Load (TMDL) restrictions on sediment, phosphorus and nitrogen. Virginia and local municipalities assign pollutant reduction credits to retention ponds that meet certain design requirements. However, to actually meet existing and …
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An evaluation of pre- and post-timber harvest water quality in low-order streams in the Missouri Ozarks
… of exceedance (PoE) were less than 15 percent. Total Suspended Solids (TSS) showed a 4% PoE which was deemed low in a natural system, whereas the maximum PoE, found for TVSS, was about 13%. Overall, the impact of timber harvest on water quality in the Ozarks was minimal comparing using PoE or …
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Linking Stream Restoration Success with Watershed, Practice and Design Characteristics
… used as a method for stream impact mitigation, Total Maximum Daily Load (TMDL) crediting, and stormwater management, there is little scientific knowledge defending stream restoration as an effective tool for addressing these issues. In particular, few studies have been conducted with the goal of …
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Municipal wastewater treatment plants' nitrogen removal response to financial incentives in Maryland and Virginia
… throughout the Bay. In 2010, the EPA developed a Total Maximum Daily Load (TMDL) for the entire watershed that established nutrient reduction targets to achieve Bay water quality objectives. The TMDL required states in the Chesapeake Bay watershed to create implementation plans to meet nutrient …
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Spatial Distribution of Suspended Sediments within the Chesapeake Bay Using Remote Sensing
… Environmental Protection Agency (EPA) has set Total Maximum Daily Load (TMDL) goals to restore the Bay. Of the pollutants, sediment is of particular concern. This remote sensing study used Visual Data 8.2 and Landsat 7 satellite images to detect and evaluate the spatial distribution of sediment …
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Development of a Risk Assessment Model to Assess TMDL Implementation Strategies
… rankings for impaired waterways and develop a Total Maximum Daily Load (TMDL) plan for each. Although past research indicates that the risk of illness to humans varies by source of fecal contamination, current watershed assessments are developed according to total concentration of indicator …
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Comparative examination of Lake Spokane groundwater for nutrient discharge by residential development influence
… study is to support the implementation of the Total Maximum Daily Load regulation for the Spokane River and Lake Spokane area in Eastern Washington in partnership with United States Geologic Survey and the Washington State Department of Ecology. The influence of residential development along …
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The effect of breaching on coastal pond water quality
… as a water quality management method because the total nitrogen (TN) concentration remains four times in exceedance of the total maximum daily load (TMDL). The high level of eutrophication in the pond has led to anoxic and hypoxic conditions, resulting in an increase in HABs that poses a danger to …
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Application of Multivariate Statistical Methodology to Model Factors Influencing Fate and Transport of Fecal Pollution in Surface Waters
… other water bodies on the 303D list through the Total Maximum Daily Load (TMDL) process has resulted in increased research to find methods that effectively and universally identify sources of fecal pollution. The main objective of this research is to better understand how microbial, chemical, and …
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Factors Influencing the Amount of Time Spent By Cattle In Streams: Implications for TMDL Development
… input parameter needed by computer models when total maximum daily load (TMDL) plans are being developed. This input parameter is estimated using professionals' best judgment because experimental data are not available, and estimations are generally inconsistent. The goal of this study was to …
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Evaluating Streambank Retreat Prediction Using the BANCS Model in the Valley and Ridge Physiographic Province
… for an estimated 7-92% of sediment and 6-93% of total-phosphorus loads to streams depending on the watershed. Stream stabilization through stream restoration has become a common practice to satisfy the 2010 Chesapeake Bay total maximum daily load (TMDL) due its value in credits received per …
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Improving microbial fate and transport modeling to support TMDL development in an urban watershed
… models are typically employed to facilitate Total Maximum Daily Load (TMDL) restoration efforts. Due to limited understanding of microbial fate and transport, predictions of FIB concentrations are associated with considerable uncertainty relative to other water-quality contaminants. By …
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Bacterial and Sediment Transport in an Artificial Sand Bed Stream During Unsteady Flow
… less than 0.58 m/s. Peak concentrations of total coliform and suspended sediments occurred in the downstream samples during the rising limb of hydrographs, due to resuspension of coliforms and sand from the bed. However, after the initial surge, there was no noticeable effect of the water …
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Regulatory and Economic Consequences of Empirical Uncertainty for Urban Stormwater Management
… Elimination Systems' Stormwater (NPDES SW), and Total Maximum Daily Load (TMDL) programs. These programs require that regulated entities reduce the discharge of pollutants from their storm drain systems to the "maximum extent practicable" (MEP), using a combination of structural and …
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