Velocity, concentration and flux of sediments in a coastal bottom boundary layer with a laser Doppler velocimeter

摘要

A backscatter fiber-optic laser Doppler velocimeter (LDV) mounted on a profiler was used to obtain velocity measurement in a coastal bottom boundary layer. The rate of velocity realization from the LDV has been used to obtain profiles of sediment concentration and flux. The instrumentation and the method for extraction of concentration and flux profile information are described. Analysis of results of interest to hydrodynamics is deferred to a later paper.