• Location of the Urban gradient study area
• Contact Information
• Major issues associated with urbanization
• Study Goals and Objectives
• Urban gradient sampling sites
• Power point presentation describing the Urban gradient special study
• OFR 01-459 Physical, Chemical, and Biological Methods and Data from the Urban Land-Use-Gradient Study, Des Plaines and Fox River Basins, Illinois, 1999-2001 (PDF format, 8 Mb)

The Urban gradient special study will address questions about the impact of urbanization on water-quality degradation in the Fox River and Des Plaines River Basins of Wisconsin and Illinois.