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Modeling Nutrient Loadings from Croplands in the Chesapeake Bay Watershed

by Anthony S. Donigian, Jr., AQUA TERRA Consultants, Mountain View, United States,
Avinash S. Patwardhan, AQUA TERRA Consultants, Mountain View, United States,



Document Type: Proceeding Paper

Part of: Water Resources Planning and Management: Saving a Threatened Resource?In Search of Solutions

Abstract:

The Chesapeake Bay Watershed Model, based on the U.S. EPA Hydrologic Simulation Program Fortran (HSPF) provides a framework for evaluating and quantifying nutrient loadings to the Chesapeake Bay. This paper briefly describes the soil nutrient module (AGCHEM) of HSPF, steps involved in developing crop and nutrient inputs, comparisons of simulated and observed nutrient runoff loadings for selected field sites, and recommendations for future application and model refinements.

Subject Headings: Computer models | Watersheds | Load factors | Bays | Runoff | Mathematical models | Hydrologic models

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