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Download Modeling Non-Point Source Pollution and Erosion into Gulf Coast
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Modeling Non-Point Source Pollution and Erosion into Gulf Coast Bays and Marshes Greg Easson – UM – PI The University of Mississippi Geoinformatics Center NASA MRC RPC – 11 July 2007 Background • Nonpoint Source Pollution and Erosion Comparison Tool (N-SPECT) model was designed by the NOAA Coastal Services Center (NOAA-CSC) • GIS based modeling systems • Predict potential water-quality impacts from nonpoint source pollution and erosion. The University of Mississippi Geoinformatics Center NASA MRC RPC – 11 July 2007 Background • Non-point source pollution is a major contributor to the decline in water quality in coastal areas. • Sources of the pollution; development and land clearing, deforestation, agriculture, lawn fertilizers and farm practices The University of Mississippi Geoinformatics Center NASA MRC RPC – 11 July 2007 Background • Users first enter information about their area (land cover, elevation, precipitation, and soil characteristics) to create the baseline information. They can then add different land cover change scenarios (such as a development) to get information about potential changes in surface water runoff, nonpoint source pollution, and erosion. The University of Mississippi Geoinformatics Center NASA MRC RPC – 11 July 2007 Objectives • Integrate existing and next generation NASA data streams into the N-SPECT model and test the model on two estuaries in the Gulf of Mexico – Mobile Bay – St. Louis Bay The University of Mississippi Geoinformatics Center NASA MRC RPC – 11 July 2007 Model Inputs • • • • Land cover grid - LDCM Digital elevation model Precipitation grid - GPM Pollutant coefficients (based on land cover) • Soil type The University of Mississippi Geoinformatics Center NASA MRC RPC – 11 July 2007 Model Outputs • Accumulated runoff, pollutant, and sediment load grids • Pollutant concentration grids • Pollutant assessment grid, which compares the resulting concentrations in receiving waters to user-specified water-quality standards The University of Mississippi Geoinformatics Center NASA MRC RPC – 11 July 2007 Project Schedule and Issues • Schedule under development • Research Associate leaving 7-31-07 • Subcontract to NOAA The University of Mississippi Geoinformatics Center NASA MRC RPC – 11 July 2007 Questions The University of Mississippi Geoinformatics Center NASA MRC RPC – 11 July 2007
