Abstract
This study evaluates the use of an acoustic Doppler profiler (ADP) for measurement of velocity profiles over dunes in an estuary. The ADP can be deployed from a moving launch and provides three-dimensional velocity profiles that can be used to describeflow structure and to provide rough estimates of shear stress. Quadratic stress models are recommended for shear stress because theyestimate skin friction and form stress whereas the law of the wall only reliably estimates total stress over dunes. The most serious limitation of the ADP is a beam geometry that results in a large sampling diameter close to the bed that does not adequately measure velocity in dune troughs.
Original language | English (US) |
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Pages (from-to) | 932-936 |
Number of pages | 5 |
Journal | Journal of Hydraulic Engineering |
Volume | 130 |
Issue number | 9 |
DOIs | |
State | Published - Sep 2004 |
Externally published | Yes |
Keywords
- Doppler systems
- Dunes
- Flow characteristics
- Measuring instruments
- Shear stress
ASJC Scopus subject areas
- Civil and Structural Engineering
- Water Science and Technology
- Mechanical Engineering