SIMULATING THE CHESAPEAKE BAY WATERSHED WITH TIME-VARYING LAND USE AND MANAGEMENT ACTIONS.
Abstract:Hydrologic Simulation Program-Fortran (HSPF) is a highly complex model that is frequently used to simulate nonpoint sources for management purposes. To obtain the best calibration, many years of in-stream monitoring data are required. During this calibration time period, changes in management practices and land use affect the pollutant export from the land surface and pollutant transport in streams. The standard application of HSPF does not easily allow for these changes during the simulation. The Chesapeake Bay Program developed a method to implement land use and management changes on any time scale. An intermediate processor is inserted between the land and water simulations that translates output from the land simulation into river input variables. The processor modifies these river input variables according to an interpolation of instantaneous land use and management practice data. This method allows the user to achieve a more accurate calibration, since forcing functions are represented in more detail. The method also contributes to analysis of, and trend detection in, water quality data.
Document Type: Research Article
Publication date: January 1, 2002
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