Space and Naval Warfare Systems Center Pacific San Diego United States
A study was conducted to evaluate impacts of resuspension from propeller wash in Department of Defense DoD harbors. This study included both field data measurement and calibration of numerical models. The study included three linked, yet separate studies, including resuspension potential by tug wash, fate and transport, and remigration, redeposition and recontamination potential of the sediment plumes from tug wash. Model-data comparisons were conducted for both the erosion potential model Graphic Maynords model and the fate and transport model CH3D for San Diego Bay, CA. The calibrated models were then used to evaluate propeller wash impact in Pearl Harbor, HI, and Sinclair Inlet, WA. Study results demonstrated that, despite the complexities associated with the transport and dynamics of propeller-wash induced sediment resuspension, study tools, including both key field data and adequately calibrated models, were effectively developed and applied to describe and predict key processes and impacts associated with propeller wash in DoD harbors.