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Measurement of Turbulence with Acoustic Doppler Current Profilers - Sources of Error and Laboratory Results

By: , , and 
Edited by: Wahl T.L.Pugh C.A.Oberg K.A.Vermeyen T.B.Wahl T.L.Pugh C.A.Oberg K.A.Vermeyen T.B.

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Abstract

Acoustic Doppler current profilers (ADCPs) provide a promising method for measuring surface-water turbulence because they can provide data from a large spatial range in a relatively short time with relative ease. Some potential sources of errors in turbulence measurements made with ADCPs include inaccuracy of Doppler-shift measurements, poor temporal and spatial measurement resolution, and inaccuracy of multi-dimensional velocities resolved from one-dimensional velocities measured at separate locations. Results from laboratory measurements of mean velocity and turbulence statistics made with two pulse-coherent ADCPs in 0.87 meters of water are used to illustrate several of inherent sources of error in ADCP turbulence measurements. Results show that processing algorithms and beam configurations have important effects on turbulence measurements. ADCPs can provide reasonable estimates of many turbulence parameters; however, the accuracy of turbulence measurements made with commercially available ADCPs is often poor in comparison to standard measurement techniques.
Publication type Conference Paper
Publication Subtype Conference Paper
Title Measurement of Turbulence with Acoustic Doppler Current Profilers - Sources of Error and Laboratory Results
ISBN 0784406553
Year Published 2002
Language English
Larger Work Title Hydraulic Measurements and Experimental Methods
First page 346
Last page 355
Conference Title Hydraulic Measurements and Experimental Methods 2002
Conference Location Estes Park, CO
Conference Date 28 July 2002 through 1 August 2002
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