The research program at the National Sedimentation Laboratory (NSL) emphasizes interdisciplinary research dealing with the processes of soil erosion; transport and deposition of sediment; movement of chemicals on upland areas and in streams; the impact of agricultural practices, in-stream structures, and bank protection on these processes; water quality; and the ecological well-being of streams. Research ranges from basic and fundamental research to applied research and technology transfer for federal and state action agencies, especially the USDA-Natural Resources Conservation Service (NRCS) and the U.S. Army Corps of Engineers (COE) in the multi-agency Demonstration Erosion Control (DEC) Project. Much of the research conducted by the NSL is in cooperation with the University of Mississippi, Mississippi State University, the Mississippi Agricultural and Forestry Experiment Station, and other universities. This cooperation has allowed NSL to conduct research related to bio-indicators, numerical modeling, and acoustical measurements and to make progress that would not occur otherwise.