Electronic Documents of Illinois
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Users should pay particular attention to version identification or dates of publication of documents retrieved. Earlier, possibly superseded, versions of documents are also stored here. TitleThorn Creek Watershed Based Plan
- Water quality has been declining in Thorn Creek for the past several decades, largely due to the effects of land conversion. With conversion to cropland and urban cover, prairie has declined from an estimated 70 percent in pre-settlement times to less than 12 percent within the grassland areas. As a result, increased stormwater runoff has carried a significant pollutant burden into the stream. Aquatic communities have suffered as well, although conditions vary along the stream course. Studies at certain locations have shown poor fish diversity and a preponderance of pollution tolerant organisms. With its array of different habitat types, however, the Thorn Creek watershed still supports a large number of species for its size, made possible in large part by the conservation of natural areas in forest preserve lands along the stream.
Originally Deposited as: 21136
Published By: Phone Number: Language(s): EN-English Volume or Year: 2005 Number or Issue: December Date Created: 02 03 2006 Date Last Modified: 11 06 2009 Librarian Remarks: |
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