Hydrodynamics in the Morganza Floodway and Atchafalaya Basin, Report 3 : Phase 3: A Report for the US Army Corps of Engineers, MRG and P

Abstract

The Morganza Floodway and the Atchafalaya Basin, located in Louisiana west of the Mississippi River, were evaluated using a two-dimensional Adaptive Hydraulics model. Prior to this study, Phase 1 and 2 model studies were performed that indicated that the existing floodway may not be able to pass the Project Design Flood discharge of 600,000 cubic feet per second due to levee overtopping. In this study, all elevations of exterior and interior levees were updated with current crest elevations. In addition, the Phase 3 effort evaluated the sensitivity of the floodways flow capacity to variations in tree/vegetation density conditions. These adjustments in roughness will improve the understanding of the role of land cover characteristics in the simulated water surfaces. This study also provides a number of inundation maps corresponding to certain flows through the Morganza Control Structure.

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Document Details

Document Type
Technical Report
Publication Date
Jan 19, 2022
Accession Number
AD1156606

Entities

People

  • Anthony G. Emiren
  • David D. Abraham
  • Gary L. Bell
  • Gaurav Savant

Organizations

  • Engineer Research and Development Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Army
  • Army Corps Of Engineers
  • Elevation
  • Engineering
  • Engineers
  • Flood Control
  • Floods
  • Hydraulics
  • Hydrodynamics
  • Measurement
  • Mississippi
  • Mississippi River
  • Roughness
  • Sensitivity
  • Three Dimensional
  • Two Dimensional
  • Vegetation

Readers

  • Coastal and Marine Engineering/Sediment Transport/Hydraulic Engineering
  • Riverine Ecology