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Title: Analysis of the 2011 Mississippi River flood from Natchez, MS, to Baton Rouge, LA, using a three-dimensional sediment model : model development and calibration
Authors: Ayres, Steven K.
Keywords: Floods--Mississippi River
Hydrodynamics--Computer simulation
River channels--Computer simulation
Sedimentation and deposition--Computer simulation
Publisher: United States. Army. Corps of Engineers. Mississippi Valley Division.
United States. Mississippi River Commission.
Coastal and Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical Report (Mississippi River Geomorphology and Potamology Program (U.S.)) ; no. MRG&P Report No. 21
Abstract: This report documents the development and calibration of a three-dimensional (3D) sediment model of the Mississippi River from Natchez, MS, to Baton Rouge, LA. The objective of the study was to provide a modeling tool capable of analyzing sedimentation in this dynamic reach of the river. The modeling domain includes five large river diversion structures: Hydroelectric Station, the Overbank, Low Sill, and Auxiliary Structures that make up the Old River Control Complex (ORCC), and the Morganza Floodway Control Structure. Evidence suggests that the Hydroelectric Station and ORCC Structures do not convey sediment in adequate proportion to maintain downstream channel stability. This modeling tool will provide a means to investigate options to improve this imbalance. In particular, the close proximity of the orifice flow diverted through the Low Sill Structure to the Mississippi River channel bed necessitates a 3D approach to properly assess sediment diversions through this structure. The open source Delft3D finite difference solver utilizing the sigma vertical layer option was the selected model platform running in a massively parallel computing environment. Sand concentration and load data collected at four ranges were compared to model results during the flood of 2011 along with water level and discharge data.
Description: MRG&P Report
Gov't Doc #: MRG&P Report No. 21
Rights: Approved for Public Release; Distribution is Unlimited
Size: 84 pages / 9.144 Mb
Appears in Collections:MRG&P Report

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