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Data Online- 1 7-Day 10-Year Low Flow Maps
- These maps provide information on low flow conditions that might be expected to occur only during droughts (once in 10 years), and associated effluent discharges, water withdrawals, and flow regulations for most Illinois rivers and streams.
- 2 Cahokia-Joachim Watershed Profile
- Environmental Protection Agency website containing numerous links to environmental data about the Cahokia-Joachim watershed.
- 3 Cahokia-Joachim Watershed Resource Links
- USGS maintained site with links to data, projects, and publications on HUC watersheds.
- 4 Cahokia-Joachim Watershed Water Data
- The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.
- 5 Flood Discharge Database
- FEMA-published and selected other statistical flood discharge values, searchable by watershed or county.
- 6 Illinois Water Quality
- EPA maintained website with links to all Illinois watershed water quality summary reports dating back to 1996.
- 7 Instantaneous Suspended Sediment Data
- The Benchmark Sediment Monitoring Program offers weekly data from suspended sediment samples collected at fifteen sampling sites throughout Illinois. Available in HTML and .csv formats.
- 8 KASKASKIA RIVER AT NEW ATHENS, IL - Water Data
- The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.
- 9 Lower Kaskaskia Watershed Profile
- Environmental Protection Agency website containing numerous links to environmental data about the Lower Kaskaskia watershed.
- 10 Lower Kaskaskia Watershed Resource Links
- USGS maintained site with links to data, projects, and publications on HUC watersheds.
- 11 Lower Kaskaskia Watershed Water Data
- The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.
- 12 Monthly Climate Data- Belleville, IL
- Monthly precipitation and temperature data provided by the State Climatologist. Data available from 1948-present.
- 13 National Weather Service: River Watch, Mississippi River Basin
- Illinois River 5-day stage forecasts for three main river segments: Morris to LaSalle, Henry to Beardstown, and New LaGrange to Hardin. Includes links to Upper Mississippi Basin stage forecasts.
- 14 Pan Evaporation Across Illinois
- Pan evaporation measurements taken at 9 sites across Illinois.
- 15 St. Clair County Water Data
- The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.
- 16 1993 Mississippi River Flood Hazard Mitigation Grant Program
- 1993 Mississippi River flood maps that show properties damaged in the event.
- 17 Illinois County Boundaries, Polygons and Lines
- GIS data - zipped shapefile
- 18 Illinois Floodplain Maps
- ISWS resource providing preliminary and final maps of Illinois floodplains.
- 19 Illinois River Watershed - Poster
- Poster-sized (26x38) map of the entire Illinois River Watershed. Part of the Illinois State Water Survey published Map Series (2003-1)
- Download Options: LoRes preview | HiRes (3.5 MB) | Metadata
- 20 Major Watersheds of Illinois
- Poster-sized (26x38) map of the major watersheds in Illinois. Part of the Illinois State Water Survey published Map Series (2000-01)
- Download Options: LoRes preview | HiRes (730 K) | Metadata
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