Measuring velocity and shear stress over dunes with acoustic Doppler profiler

Ray Kostaschuk, Paul Villard, Jim Best

Research output: Contribution to journalArticle

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 languageEnglish (US)
Pages (from-to)932-936
Number of pages5
JournalJournal of Hydraulic Engineering
Volume130
Issue number9
DOIs
StatePublished - Sep 2004
Externally publishedYes

Keywords

  • Doppler systems
  • Dunes
  • Flow characteristics
  • Measuring instruments
  • Shear stress

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology
  • Mechanical Engineering

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