Comparison of observed near-bed velocities and modeled near-bed veloci

Comparison of observed near-bed velocities and modeled near-bed velocities using several bottom-roughness formulations. Velocity vectors are overlaid on map of backscatter from the sea floor showing regions with coarse sand (light color) and fine sand (dark colors). White lines are bathymetry contours. Mean velocities were averaged over entire period (top panel), flood and ebb velocities were determined from dominant alongshore flow direction, and separately averaged for flood- and ebb-oriented flows with speeds >5 cm/s after removing mean velocities (bottom panel). Note change in arrow scale between two panels