PPT Slide

While this stream at 8-10% impervious cover is still relatively stable, signs of stream erosion are more apparent and include loss of the wetted perimeter, more eroded material in the banks, and debris.

Copyright 2000, Center for Watershed Protection

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At 8%-10% impervious cover, while the stream is still relatively stable, changes in the stream shape become more visible. Signs of stream erosion, loss of the wetted perimeter, more eroded material in the banks, and debris become more evident.