Measurement of Turbulence with Acoustic Doppler Current Profilers - Sources of Error and Laboratory Results
By: E.A. Nystrom, K. A. Oberg, and C.R. Rehmann
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.
Suggested Citation
Nystrom, E., Oberg, K.A., Rehmann, C., 2002, Measurement of Turbulence with Acoustic Doppler Current Profilers - Sources of Error and Laboratory Results, in Hydraulic Measurements and Experimental Methods, Estes Park, CO, 28 July 2002 through 1 August 2002, p. 346-355.
| 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 |