Author(s): Mark T. Stacey; Stephen G. Monismith
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Keywords: No Keywords
Abstract: In this paper we discuss the application of an Acoustic Doppler Current Profiler (ADCP) to the measurement of turbulence in estuarine flows. We show how the accuracy of turbulence measurements based on calculation of along-beam variances is related to the intrinsic noise of the ADCP. In general, estimates of the turbulent shear stresses are unbiased whereas similar estimates of the velocity variances are offset by an amount proportional to uncertainty in estimating the fluid velocity using a single ping. This analysis is confirmed using field data collected with a four beam ADCP in an unsteady open channel flow.
Year: 1997