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Author: Anthony S. Donigian
Publisher:
ISBN:
Category : Chesapeake Bay (Md. and Va.)
Languages : en
Pages : 0
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Book Description
The focus of this research work was to improve the overall utility of the Chesapeake Bay Watershed Model, based on the U.S. Environmental Protection Agency Hydrologic Simulation Program-Fortran (HSPF) model, as a planning tool for comprehensive watershed planning and assessment The specific improvements recommended and tasks performed in this effort included refinement of the agricultural (AGCHEM) module simulation to better represent plant uptake impacts of agricultural practices and nutrient management scenarios, testing the AGCHEM refinements, applying the refined AGCHEM to selected subbasins of the Chesapeake Bay drainage, and recalibrating the refined Watershed Model to the selected subbasins.
Author: Anthony S. Donigian
Publisher:
ISBN:
Category : Chesapeake Bay (Md. and Va.)
Languages : en
Pages : 0
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Book Description
The focus of this research work was to improve the overall utility of the Chesapeake Bay Watershed Model, based on the U.S. Environmental Protection Agency Hydrologic Simulation Program-Fortran (HSPF) model, as a planning tool for comprehensive watershed planning and assessment The specific improvements recommended and tasks performed in this effort included refinement of the agricultural (AGCHEM) module simulation to better represent plant uptake impacts of agricultural practices and nutrient management scenarios, testing the AGCHEM refinements, applying the refined AGCHEM to selected subbasins of the Chesapeake Bay drainage, and recalibrating the refined Watershed Model to the selected subbasins.
Author: Anthony S. Donigian
Publisher:
ISBN:
Category : Chesapeake Bay (Md. and Va.)
Languages : en
Pages : 244
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Book Description
The focus of this research work was to improve the overall utility of the Chesapeake Bay Watershed Model, based on the U.S. Environmental Protection Agency Hydrologic Simulation Program-Fortran (HSPF) model, as a planning tool for comprehensive watershed planning and assessment The specific improvements recommended and tasks performed in this effort included refinement of the agricultural (AGCHEM) module simulation to better represent plant uptake impacts of agricultural practices and nutrient management scenarios, testing the AGCHEM refinements, applying the refined AGCHEM to selected subbasins of the Chesapeake Bay drainage, and recalibrating the refined Watershed Model to the selected subbasins.
Author: Anthony S. Donigian
Publisher:
ISBN:
Category : Chesapeake Bay (Md. and Va.)
Languages : en
Pages : 0
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Book Description
The focus of this research was to improve the overall utility of the Chesapeake Bay Watershed Model, based on the U.S. Environmental Protection Agency Hydrologic Simulation Program-Fortran model, as a planning tool for comprehensive watershed planning and assessment The Chesapeake Bay Watershed Model is a unique state of-the-art watershed modeling capability that includes detailed soil process simulation for agricultural areas, linked to an instream water quality and nutrient model capable of representing comprehensive point and nonpoint pollutant loadings for the entire 68,000 square mile drainage area of the Chesapeake Bay The specific improvements recommended and tasks performed in this effort included development of nutrient balances for nonagricultural land uses; testing of the application procedures for forest, pasture, and urban land uses; and application of the enhanced model to the Shenandoah Subbasin within the Chesapeake Bay watershed to assess load contributions and impacts of the model refinements. The real benefits of the current refinement phase of the Chesapeake Bay Program Watershed Model are realized from the extension of the nutrient balance approach to all major land use (except urban, in the simulations) and the utility of this approach for nutrient management.
Author: Anthony S. Donigian
Publisher:
ISBN:
Category : Chesapeake Bay (Md. and Va.)
Languages : en
Pages : 118
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Book Description
The focus of this research was to improve the overall utility of the Chesapeake Bay Watershed Model, based on the U.S. Environmental Protection Agency Hydrologic Simulation Program-Fortran model, as a planning tool for comprehensive watershed planning and assessment The Chesapeake Bay Watershed Model is a unique state of-the-art watershed modeling capability that includes detailed soil process simulation for agricultural areas, linked to an instream water quality and nutrient model capable of representing comprehensive point and nonpoint pollutant loadings for the entire 68,000 square mile drainage area of the Chesapeake Bay The specific improvements recommended and tasks performed in this effort included development of nutrient balances for nonagricultural land uses; testing of the application procedures for forest, pasture, and urban land uses; and application of the enhanced model to the Shenandoah Subbasin within the Chesapeake Bay watershed to assess load contributions and impacts of the model refinements. The real benefits of the current refinement phase of the Chesapeake Bay Program Watershed Model are realized from the extension of the nutrient balance approach to all major land use (except urban, in the simulations) and the utility of this approach for nutrient management.
Author: Vijay P. Singh
Publisher: CRC Press
ISBN: 1420037439
Category : Science
Languages : en
Pages : 678
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Book Description
Watershed modeling is at the heart of modern hydrology, supplying rich information that is vital to addressing resource planning, environmental, and social problems. Even in light of this important role, many books relegate the subject to a single chapter while books devoted to modeling focus only on a specific area of application. Recognizing the
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309210798
Category : Political Science
Languages : en
Pages : 258
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Book Description
The Chesapeake Bay is North America's largest and most biologically diverse estuary, as well as an important commercial and recreational resource. However, excessive amounts of nitrogen, phosphorus, and sediment from human activities and land development have disrupted the ecosystem, causing harmful algae blooms, degraded habitats, and diminished populations of many species of fish and shellfish. In 1983, the Chesapeake Bay Program (CBP) was established, based on a cooperative partnership among the U.S. Environmental Protection Agency (EPA), the state of Maryland, and the commonwealths of Pennsylvania and Virginia, and the District of Columbia, to address the extent, complexity, and sources of pollutants entering the Bay. In 2008, the CBP launched a series of initiatives to increase the transparency of the program and heighten its accountability and in 2009 an executive order injected new energy into the restoration. In addition, as part of the effect to improve the pace of progress and increase accountability in the Bay restoration, a two-year milestone strategy was introduced aimed at reducing overall pollution in the Bay by focusing on incremental, short-term commitments from each of the Bay jurisdictions. The National Research Council (NRC) established the Committee on the Evaluation of Chesapeake Bay Program Implementation for Nutrient Reduction in Improve Water Quality in 2009 in response to a request from the EPA. The committee was charged to assess the framework used by the states and the CBP for tracking nutrient and sediment control practices that are implemented in the Chesapeake Bay watershed and to evaluate the two-year milestone strategy. The committee was also to assess existing adaptive management strategies and to recommend improvements that could help CBP to meet its nutrient and sediment reduction goals. The committee did not attempt to identify every possible strategy that could be implemented but instead focused on approaches that are not being implemented to their full potential or that may have substantial, unrealized potential in the Bay watershed. Because many of these strategies have policy or societal implications that could not be fully evaluated by the committee, the strategies are not prioritized but are offered to encourage further consideration and exploration among the CBP partners and stakeholders.
Author: National Academies of Sciences, Engineering, and Medicine
Publisher: National Academies Press
ISBN: 0309679702
Category : Science
Languages : en
Pages : 423
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Book Description
New York City's municipal water supply system provides about 1 billion gallons of drinking water a day to over 8.5 million people in New York City and about 1 million people living in nearby Westchester, Putnam, Ulster, and Orange counties. The combined water supply system includes 19 reservoirs and three controlled lakes with a total storage capacity of approximately 580 billion gallons. The city's Watershed Protection Program is intended to maintain and enhance the high quality of these surface water sources. Review of the New York City Watershed Protection Program assesses the efficacy and future of New York City's watershed management activities. The report identifies program areas that may require future change or action, including continued efforts to address turbidity and responding to changes in reservoir water quality as a result of climate change.
Author: Gary W. Shenk
Publisher:
ISBN:
Category : Chesapeake Bay Watershed
Languages : en
Pages : 641
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Book Description
Author: Carl F. Cerco
Publisher:
ISBN:
Category : Eutrophication
Languages : en
Pages : 48
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Book Description
The Corps of Engineers, in partnership with the U.S. Environmental Protection Agency Chesapeake Bay Program Office, recently completed a three- dimensional model study of eutrophication in Chesapeake Bay and tributaries. The model package applied included an intratidal hydrodynamic model, an intertidal water-quality model, and a benthic sediment diagenesis model. This report comprises a workplan to improve model representation of Chesapeake Bay tributaries and to incorporate living resources directly into the model framework. Four tributaries have been selected for emphasis under this tributary refinements program. They are the James, York, and Rappahannock rivers, and Baltimore Harbor. The James, York, and Rappahannock were specified because tributary-specific models are required to address water-quality and living- resource benefits to be derived from nutrient reductions. Baltimore Harbor was specified because it presents unique management problems, coupled with long-term toxic impacts, which cannot be addressed in the current model framework. The time scale for the project is 4 years from initiation to completion. Anticipated commencement is April 1, 1994.
Author: Stephen D. Preston
Publisher:
ISBN:
Category : Nitrates
Languages : en
Pages : 12
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Book Description
