Sediment Modeling based on Radar Observed Surface Hydrodynamics

An integration method will be presented to combine a one dimensional bottom shear stress model based on hydrodynamic field observations with radar current data. The data acquired are the bathymetry, the surface current velocity, the grain size and vertical profiles of the current and water characteristics. The observation method used here was run fully operationally for the first time during an experiment in May 2006. We estimate the bottom shear stress from the surface current under the parametric approach that we have hydrographic conditions of a completely mixed water column. Several assumptions have to be made i.e. a hydrodynamical rough bottom and a homogeneous wind situation for each profile. As results we present area-wide maps of the bottom shear stress value and maps of the initiation of motion.