| Summary: | The Louisiana broiler production region is located in North Central and Northwestern Louisiana. The region consists of twelve parishes in Northwestern and North Central Louisiana. The broiler production region is a significant contributor of nonpoint source (NPS) pollution to nearby waterways. This pollution is a consequence of sediment, nitrogen and phosphorus runoff caused by agricultural production. NPS pollution is difficult to mitigate due to uncertainties in its point of origin as well as a host of other factors ranging from rainfall to topographical parameters. Best Management Practices (BMPS) have been shown to be a reliable method for reducing nonpoint source pollution emanating from agricultural production. To reduce pollutants, several BMPs have been recommended, specific to crops and regions, by the Natural Resource Conservation Service of the United States Department of Agriculture, (NRCS/USDA) and U.S. Environmental Protection Agency (EPA). Successful implementation of best management practices for water quality improvement requires careful study of both nonpoint pollution sources and their effectiveness in a given spatial situation. These assessments are being conducted for several watersheds throughout the United States; however, many watersheds in Louisiana remain unexamined. This study focuses on two watersheds in the broiler production region of Louisiana and utilizes a GIS based simulation program to determine the best least cost solution for the application of BMPs in the study region. Analyses were conducted under alternative climate change and BMP effectiveness scenarios. Results indicate that it is cost-effective to implement nutrient management to reduce phosphorus pollution.
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