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Title: Levee setback utility for mission integration in the Sangamon River floodplain : Illinois Waterway
Authors: Theiling, Charles H.
Kirkeeng, Thomas A.
Haring, Christopher P.
Dahl, Travis A.
Keywords: Environmental management
Flood control
Floodplain management
Sangamon River (Ill.)--Levees
Sangamon River (Ill.)--Sediment transport
Stream restoration
Publisher: Environmental Laboratory (U.S.)
Coastal and Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical Report (Engineer Research and Development Center (U.S.));no. ERDC TR-18-12
Abstract: This document presents a levee setback case study on the Sangamon River near Beardstown, IL. Five potential setback scenarios were tested using a Hydrologic Engineering Center-River Analysis System (HEC-RAS) hydraulic and sediment model. HEC-RAS results demonstrated differences in flood reduction and sediment trapping opportunities among gate opening and levee-removal scenarios. Levee removal upstream of a bridge and causeway provided the greatest sediment reduction potential. Increasing flow into connected floodplain areas offered intermediate flood and sediment reduction benefits but did not improve natural resource benefits. Levee removal and land conversion provided the greatest natural resources benefit, but substantial economic loss. This study demonstrates the potential benefits of levee setbacks across the U.S. Army Corps of Engineers navigation, ecosystem restoration, and flood management mission areas.
Description: Technical Report
Gov't Doc #: ERDC TR-18-12
Rights: Approved for Public Release; Distribution is Unlimited
Size: 50 pages / 6.83 Mb
Types of Materials: PDF/A
Appears in Collections:Technical Report

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