Browse Critical Trends Assessment Program Regional Watershed Assessments by Subject "Ecosystem management --Illinois"

  • Illinois Department of Natural Resources. Office of Scientific Research and Analysis (Illinois Dept. of Natural Resources, 1997)
    The Headwaters assessment area (HAA) is an approximately 1,675 mile2 (I ,072,202 acre) area including much ofChampaign County and portions ofFord, Livingston, McLean, Iroquois, Vermilion, Douglas, Piatt, and De Witt counties ...

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  • (Illinois Dept. of Natural Resources, 1997)
    Just as the Grand Prairie -- Illinois' namesake landscape -- was the heart of the continent's "Prairie Peninsula," so the Headwaters area of east central Illinois is the heart of the Grand Prairie. It is one of the ...

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  • Post, Susan L. (Illinois Dept. of Natural Resources, 2000)

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