Evaluation of Loading on Water Quality Attributable to Non-point Sources PDF Download
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Author: George Gregory Clark
Publisher:
ISBN:
Category : Urban runoff
Languages : en
Pages : 0
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Book Description
"The purpose of this study was to evaluate the loadings on the water quality of Corpus Christi Bay which could be attributable to urban runoff. Water quality and quantity models previously developed were utilized and applied to the study area. These models predict the storm runoff hydrograph for a given rainfall and the concentration of 13 different water quality parameters at selected time intervals during the storm. The runoff model was used to predict storm runoff for comparison with actual flow data for the gaging station on Oso Creek. Good results were obtained for two different storm events. The models were then applied to the remaining urban subareas using a "maximum" storm of 2.10 inches and the "average" storm of 0.48 inches over a six hour period. Results indicate the strength of the pollution found in urban runoff is somewhat less than the strength of untreated municipal wastewater for Corpus Christi, Texas. However, the loads from the runoff are significant and should be recognized as a source of pollution"--Leaf 1
Author: George Gregory Clark
Publisher:
ISBN:
Category : Urban runoff
Languages : en
Pages : 0
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Book Description
"The purpose of this study was to evaluate the loadings on the water quality of Corpus Christi Bay which could be attributable to urban runoff. Water quality and quantity models previously developed were utilized and applied to the study area. These models predict the storm runoff hydrograph for a given rainfall and the concentration of 13 different water quality parameters at selected time intervals during the storm. The runoff model was used to predict storm runoff for comparison with actual flow data for the gaging station on Oso Creek. Good results were obtained for two different storm events. The models were then applied to the remaining urban subareas using a "maximum" storm of 2.10 inches and the "average" storm of 0.48 inches over a six hour period. Results indicate the strength of the pollution found in urban runoff is somewhat less than the strength of untreated municipal wastewater for Corpus Christi, Texas. However, the loads from the runoff are significant and should be recognized as a source of pollution"--Leaf 1
Author: George G. Clark
Publisher:
ISBN:
Category : Nonpoint source pollution
Languages : en
Pages : 262
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Book Description
Author: George G. Clark
Publisher:
ISBN:
Category : Nonpoint source pollution
Languages : en
Pages : 262
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309172683
Category : Nature
Languages : en
Pages : 569
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Book Description
In 1997, New York City adopted a mammoth watershed agreement to protect its drinking water and avoid filtration of its large upstate surface water supply. Shortly thereafter, the NRC began an analysis of the agreement's scientific validity. The resulting book finds New York City's watershed agreement to be a good template for proactive watershed management that, if properly implemented, will maintain high water quality. However, it cautions that the agreement is not a guarantee of permanent filtration avoidance because of changing regulations, uncertainties regarding pollution sources, advances in treatment technologies, and natural variations in watershed conditions. The book recommends that New York City place its highest priority on pathogenic microorganisms in the watershed and direct its resources toward improving methods for detecting pathogens, understanding pathogen transport and fate, and demonstrating that best management practices will remove pathogens. Other recommendations, which are broadly applicable to surface water supplies across the country, target buffer zones, stormwater management, water quality monitoring, and effluent trading.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309254965
Category : Nature
Languages : en
Pages : 142
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Book Description
The Environmental Protection Agency's estimate of the costs associated with implementing numeric nutrient criteria in Florida's waterways was significantly lower than many stakeholders expected. This discrepancy was due, in part, to the fact that the Environmental Protection Agency's analysis considered only the incremental cost of reducing nutrients in waters it considered "newly impaired" as a result of the new criteria-not the total cost of improving water quality in Florida. The incremental approach is appropriate for this type of assessment, but the Environmental Protection Agency's cost analysis would have been more accurate if it better described the differences between the new numeric criteria rule and the narrative rule it would replace, and how the differences affect the costs of implementing nutrient reductions over time, instead of at a fixed time point. Such an analysis would have more accurately described which pollutant sources, for example municipal wastewater treatment plants or agricultural operations, would bear the costs over time under the different rules and would have better illuminated the uncertainties in making such cost estimates.
Author: CLARK G C
Publisher:
ISBN:
Category : Runoff
Languages : en
Pages : 131
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Book Description
Author: G. G. Clark
Publisher:
ISBN:
Category : Water resources development
Languages : en
Pages :
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Book Description
Author: G. Pyke
Publisher: International Water Assn
ISBN: 9781843398660
Category : Science
Languages : en
Pages : 140
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Book Description
Utilities can help protect source quality and reduce treatment costs at minimal expense by forming partnerships with watershed stakeholders. Utility participation in protection efforts, even at zero or low BMP cost-share levels, helps leverage funds and prioritizes the watershed as a drinking water catchment. Due to the high cost of treatment plant capital improvements relative to watershed BMPs, utilities should consider long-term investment in source protection measures in order to reduce the need for major process changes. Utilities should also consider non-economic benefits of source protection, including the public health benefit of reduced exposure to pesticides, pathogens, and emerging contaminants. This guidance manual includes the following: . A literature review describing the extent and impact of agricultural non-point source pollution, and the pollutant removal mechanisms and performance of common agricultural BMPs . An overview of watershed modeling that describes watershed models, their limitations, and the resources needed to use them . An overview of water treatment plant simulation modeling that describes underlying model assumptions . Results of watershed model runs showing the relative contributions of different point and non-point sources and the effects of BMP implementation on pollutant loads . Results of WTP model runs that show the impact of changes in pollutant loads on the operations, costs, and effluent quality of four WTP types RESEARCH PARTNER WERF
Author: A. D. McElroy
Publisher:
ISBN:
Category : Runoff
Languages : en
Pages : 470
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Book Description
Author: OECD
Publisher: OECD Publishing
ISBN: 926417933X
Category :
Languages : en
Pages : 258
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Book Description
The report includes a selection papers presented at the OECD Workshop on Evaluation of Agri-environmental Policies, held 20-22 June 2011.
