7-Day 10-Year Low Flow Maps - Map Information, Illinois State Water Survey

7-Day 10-Year Low Flow Maps

Map 1. Rock River Region


The low flow estimates presented here for the Rock River region represent an October 2002 update of previous published versions (Singh, 1973; Singh et al., 1988a). These new low flow values were estimated from the Illinois Streamflow Assessment Model for the Rock River watershed, the preparation and analysis of which is documented in Knapp (2002). The estimates produced by this model are based on hydrologic data collected up through 2001, which include USGS streamgage records, water-use records collected by the Illinois State Water Survey, and discharge data from wastewater treatment facilities and industries as reported to the Illinois Environmental Protection Agency. Selected water use and effluent discharge estimates have been updated so that the values represent the current (2001) hydrologic conditions in the region.

Knapp, H.V. 2002. Streamflow Assessment Model for the Rock River Watershed: Hydrologic Analysis. Illinois State Water Survey Contract Report, in preparation.

Illinois State Water Survey

2204 Griffith Dr
Champaign, IL 61820-7463
217-244-5459
info@isws.illinois.edu

Terms of use. Email the Web Administrator with questions or comments.

© 2017 University of Illinois Board of Trustees. All rights reserved.
For permissions information, contact the Illinois State Water Survey.
Site Map