The Illinois State Water Survey (ISWS) established four streamgaging stations in selected tributaries of the Sangamon River in Macon and Champaign Counties to monitor streamflow and nutrients for the Agricultural Watershed Institute (AWI). AWI received a grant from the U.S. Environmental Protection Agency (USEPA) to conduct the Upper Sangamon River Targeted Watershed Project (USRTWP) to address behavioral, technical, and economic aspects of nutrient management associated with agricultural crop production. The goal of the USRTWP study was to determine if water quality would improve by reducing nutrient discharges from agricultural areas by incorporating market-based implementation mechanisms. This report presents the annual precipitation, streamflow, runoff, and nitrogen and phosphorus concentration data for these stations in the two counties.
Keefer, L.L. and Bauer, E. (2011): Upper Sangamon River watershed monitoring data for the USEPA targeted watershed study: 2005–2008. Illinois State Water Survey, Contract Report 2011-03 .