|dc.description.abstract||A surf zone sediment transport study was conducted in Jamaica Beach, Texas,
using new oceanographic equipment. A mini-sled was constructed and outfitted with an
instrument package that consisted of two velocimeters, one current profiler, three OBS's
(Optical Back Scatter), and a Sequoia Instruments LISST (Laser in situ Scatteroineter
and Transinissoineter). This instrumented sled was used to measure sand concentration
and flow velocity across the surf zone. Using these two parameters we were able to
determine longshore sand transport.
The study provided an accurate measurernent of sand transport on a muddy coast.
Previous methods for measuring total longshore sediment transport did not quantify the
effect that mud-sized particles would have on OBS's. To circumvent this issue we used
the LISST to measure sand concentration in the water. The LISST can measure sand
concentration despite the presence of mud.
During this study it appeared that sand transport peaks 10 cm above the sea
bottom. The measured total longshore transport rate closely matched results from one
equation for determining total longshore transport (Kamphius, 199 1). The CERC
equation was also compared to the measured result.||