Numerical Model of Mississippi River at Lock and Dam 26

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by Avenant Melidor, US Army Engineer District, St., Louis, MO, USA,
W. A. Thomas, US Army Engineer District, St., Louis, MO, USA,
W. H. McAnally, US Army Engineer District, St., Louis, MO, USA,

Document Type: Proceeding Paper

Part of: Water for Resource Development

Abstract: Replacement work was initiated in November 1979. The first stage cofferdam constricted about half of the river channel. As a result, the flow velocity at the constriction increased causing considerable erosion, and the river bed dropped about 20 ft during the period of May 1981 to May 1982. The St. Louis District had the Waterways Experiment Station (WES) conduct a physical, movable-bed, hydraulic model study of the scour problem. In addition, the district applied the TABS-2 Numerical Modeling System to the problem with assistance from WES Hydraulics Laboratory personnel. The results of the TABS-2 study are reported. TABS-2 is a system of generalized computer programs and utility programs that are used to model open channel flows and transport processes, including sedimentation.

Subject Headings: Hydraulic models | Numerical models | Locks (dam) | Hydrologic models | Open channel flow | Locks (waterway) | Rivers and streams | Sediment transport | Water flow | Computer models | Model analysis | Water supply systems | Mississippi River

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