Kings Bay Channel Expansion Hybrid Model Assessment

by Mitchell A. Granat, Waterways Experiment Sta, Vicksburg, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


A hybrid modeling system (coupled physical and numerical models) was developed to assess velocity and sediment impacts associated with channel expansion. Physical model tides and velocities were verified to limited field data sets. The physical model examined three-dimensional changes associated with the project and provided boundary forcing conditions for the numerical hydrodynamic model. The numerical model was verified to an expanded physical model data set. The numerical hydrodynamic model provided velocity and water level information to the sediment model. The sediment model was verified to predeepened channel shoaling history. Subtle velocity impacts were identified comparing the predeepened base condition to the deepened plan channel condition. The plan channel increased the maintained channel area by approximately 70 percent (depth, width, and extension). Numerical sediment model predictions indicated a 150 percent increase in yearly maintenance requirements for the enlarged channel.

Subject Headings: Numerical models | Physical models | Channels (waterway) | Hybrid methods | Bays | Fluid velocity | Sediment | Channel stabilization

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