Upper and Lower Hamburg Bend 2011 Flood Evaluation on the Missouri River near Hamburg, Iowa

Abstract : This report describes a numerical modeling study on the Missouri River in the vicinity of Hamburg, IA, specifically in the vicinity of River Miles 557 to 550. The study was conducted by the Engineering and Research Development Center, Coastal and Hydraulics Laboratory. The purpose of the study was to assist the U.S. Army Corps of Engineers, Omaha District, to define the impact of constructed chutes on floodplain flow velocity and direction within Hamburg Bend during the 2011 flood event. The evaluation required numerical hydrodynamic modeling of a pre-2011 flood condition of the entire floodplain and main channel with and without the constructed chutes to determine whether the implementation of the Upper and Lower Hamburg Bend chutes had any hydraulic effect in the study area during the flood.