Lower Mississippi River Salt Intrusion Modeling

by Billy H. Johnson, US Army Engineer Waterways, Experiment Station, Vicksburg, MS, USA,
Marden B. Boyd, US Army Engineer Waterways, Experiment Station, Vicksburg, MS, USA,
Ronald R. Copeland, US Army Engineer Waterways, Experiment Station, Vicksburg, MS, USA,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract: A laterally averaged numerical model called LAEM has been employed for both a 40- and 55-ft channel. In addition, LAEM has been applied with an increased height of the natural river crossing at river mile 63 to determine if such a sill provides an effective means of controlling salinity intrusion during critically low flow periods. A separate question concerning the stability of such a sill constructed from natural river sediment dredged from upstream has been addressed by applying the sediment transport model, HEC-6 (US Army Engineer Hydrologic Engineering Center 1977).

Subject Headings: Hydrologic models | Salts | Rivers and streams | Sediment transport | Mathematical models | Water resources | Salt water intrusion | Transportation engineering | Reefs and sills | Numerical models | Mississippi River

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