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DAILY MEAN DISCHARGE GRAPHS FOR 3 SELECT SITES IN ILLINOIS

Map of Illinois showing the location of 3 USGS gaging stations

Daily mean discharge graphs for 3 U.S. Geological Survey streamflow-gaging stations in the northern, central, and southern parts of the State of Illinois are presented here. The graphs represent 1 year of data from today's date.
Graphs are updated daily.

Daily mean discharge for the 1-year time period is compared with the percentile distribution of mean daily discharges for the 30-year period, 1961-90. Daily mean discharge is in the deficient-flow range if its value is less than or equal to the 25th percentile, in the normal-flow range if its value is between 25th and 75th percentiles, and in the excessive-flow range if its value is equal to or greater than the 75th percentile.

Pecatonica River at Freeport (USGS 05435500) is located in Stephenson County in northern Illinois and has a drainage area of approximately 1,326 square miles.
Visit the web site for this gage

Sangamon River at Monticello (USGS 05572000) is located in Piatt County in central Illinois and has a drainage area of approximately 550 square miles.
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Skillet Fork at Wayne City (USGS 03380500) is located in Wayne County in southern Illinois and has a drainage area of approximately 464 square miles.
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Disclaimer: USGS data on this page have not received Director's approval and as such are provisional and subject to revision. The data are released on the condition that neither the USGS nor the United States Government may be held liable for any damages resulting from their use.

This is the explanation for percentile classes in regards to the following graph where brown equals lowest or tenth percentile, yellow equals ten to twenty four, green equals twenty five to seventy five, teal equals seventy six to ninety, blue equals ninetieth percentile to highest, and the solid black line represents the flow.

Daily-mean discharge graph for USGS gaging station 05435500

Daily-mean discharge graph for USGS gaging station 05572000

Daily-mean discharge graph for USGS gaging station 03380500

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Page Last Modified: Wednesday, 22-May-2013 13:06:51 CDT