Jet-ski

Bathymetry of the measurement area is surveyed frequently during the experiment using an instrumented jetski (Jamie MacMahan, University of Florida: macmahan@coastal.ufl.edu ). The jetski is equipped with DGPS navigation with motion compensation, echo sounder and a bottom tracking ADCP. The beach is surveyed at low tide using DPGS mounted on a motorized vehicle (Gator) overlapping the jetski survey.

In addition, current velocity and surface elevation are measured with a self-contained Doppler profiler deployed in the rip-channels. Surface elevation and depth averaged velocity components measured in the feeder current to the rip are shown below. Sample rate is 1 Hz. The low-pass signal is indicated, showing considerable variation and pulsing over the one-hour record.