Levee Setback Utility for Mission Integration in the Sangamon River Floodplain: Illinois Waterway

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.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2018
Accession Number
AD1064139

Entities

People

  • Charles H. Theiling
  • Christopher P. Haring
  • Thomas A. Kirkeeng
  • Travis Dahl

Tags

DTIC Thesaurus Topics

  • Army Corps Of Engineers
  • Civil Engineering
  • Climate Change
  • Ecology
  • Ecosystems
  • Engineering
  • Engineers
  • Environment
  • Flood Control
  • Flood Hazards
  • Floods
  • Habitats
  • Illinois
  • Natural Resources
  • Sedimentation
  • United States
  • Waterways

Fields of Study

  • Environmental science

Readers

  • Coastal and Marine Engineering/Sediment Transport/Hydraulic Engineering