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

7-Day 10-Year Low Flow Maps

Map 7. Kaskaskia Region


The low flow estimates presented here for the Sangamon 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 Kaskaskia River watershed, which is currently being updated from the original version of the model, documented in Knapp (1990). The revised low flow 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. 1990. Kaskaskia River Basin Streamflow Assessment Model: Hydrologic Analysis. Illinois State Water Survey Contract Report 499.

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