Template , Illinois State Water Survey

Illinois Streamflow Assessment Model

 Progress:   Step 1     Step 2     Step 3  
Welcome to the Illinois Streamflow Assessment Model (ILSAM) web site. ILSAM produces statistical estimates of flow quantity in Illinois streams. The ILSAM flow estimates are representative of long-term climatic conditions, with base periods covering the past 50 years or more, but also account for recent man-made modifications to the flow amount such as have been caused by reservoirs, water-supply withdrawals, and discharges from wastewater treatment plants. Flow estimates may be obtained for thousands of stream locations within each major watershed.
Values may be updated periodically as a result of additional review and analysis or to account for recent changes in water use or water resource development.
Long-term support for the development and maintenance of ILSAM has been provided by the Illinois Department of Natural Resources, Office of Water Resources.
Step 1 Instructions for Selecting a Location:
1. Choose a watershed from the list below or click on a watershed in the map.
2. Select a stream from the list or click on a stream in the map.
3. Pick a mile from the list or click on a mile point in the map.
4. Click the "Continue" button to choose a flow parameter, and then view data on that location.

Illinois State Water Survey

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Champaign, IL 61820-7463
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