Impacts of Stream Channel Response to Increased Soil Erosion on SIUE Campus

Authors: Alicia Terry*,
Topics: Water Resources and Hydrology, Geomorphology
Keywords: Landslide, Soil Erosion, Sediment Distribution, Urban Run-off
Session Type: Illustrated Paper
Day: 4/12/2018
Start / End Time: 8:00 AM / 9:40 AM
Room: Canal St. Corridor, Sheraton, 3rd Floor
Presentation File: No File Uploaded

As a consequence of the large amount of impermeable surface distributed throughout Southern Illinois University Edwardsville, the increased volume of water running off directly into nearby streams has increased rates of soil erosion across campus. As SIUE continues to grow, it becomes increasingly necessary to understand how nearby stream systems are affected by this erosion. To understand local stream channel response to the increased volume of direct run-off, we selected a single site of a collapsed stream bank from an area with a high volume of stream bank erosion. An analysis of soil properties and characteristics from the collapsed bank and surrounding banks was used to identify key features of the soil that made these banks exceptionally vulnerable to erosion and collapse. Stream channel data including cross section data, sediment size, composition, and distribution, and flow characteristics from 10 ft upstream and downstream of the collapsed bank will summarize stream response. The results of this study will show changes in stream characteristics and sediment distribution upstream and downstream of the collapsed bank. The features and sediment characteristics found at this site are comparable to those throughout campus and therefore any conclusions gained from this specific location will transfer to other areas where bank collapse is likely to occur. This assessment provides preliminary data to predict and potentially mitigate the effects erosion occurring on SIUE campus.

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