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Map 2. NE Illinois Streams
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The low flow estimates presented here for the Northeastern Illinois
region represent a February 2003 update of previous published versions
(Singh, 1973; Singh, 1983; Singh and Ramamurthy, 1993). For the Fox
River watershed, low flow values were estimated from the Illinois
Streamflow Assessment Model (ILSAM), the preparation and analysis of
which is documented in Knapp (1988) and Knapp and Myers (1999). Flow
estimates for this map reflect hydrologic conditions based on hydrologic
data collected up through 2001, which include analysis of 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.
Knapp, H.V. 1988. Fox River Basin Streamflow Assessment Model:
Hydrologic Analysis. Illinois State Water Survey Contract Report 454.
Knapp, H.V., and M.W. Myers. 1999. Fox River Basin Streamflow Assessment
Model: 1999 Update to the Hydrologic Analysis. Illinois State Water
Survey Contract Report 649.
Map Updated 4/30/2003
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