Automatic water samplers and a U.S. Geological Survey (USGS) gauging station were established in 1995 on the main stem of the Illinois River at the Arkansas Highway 59 Bridge. Since that time, continuous stage and discharge measurements and water quality sampling have been used to determine pollutant concentrations and loads in the Arkansas portion of the Illinois River. This report represents the results from the measurement and sampling for January 1, 1998 to December 31, 1998.
Nelson, Marc A. and Soerens, Thomas S.. 1999. Illinois River 1998 Nutrient and Suspended Sediment Loads at Arkansas Highway 59 Bridge. Arkansas Water Resources Center, Fayetteville, AR. MSC 277. 17