Field measurements of mean velocity and boundary shear stress with an Acoustic Doppler Current Profiler

J. Petrie, P. Diplas, M. Gutierrez, S. Nam

Research output: Contribution to book or proceedingConference articlepeer-review

Abstract

The boat-mounted Acoustic Doppler Current Profiler (ADCP) is a powerful tool for measuring the three-dimensional flow field in rivers. Velocity data can be obtained using either fixed-(FV) or Moving-Vessel (MV) procedures. The reduced field effort involved in the collection of MV data has prompted investigators to seek MV procedures that provide equivalent results to FV measurements. This study compares mean velocity and boundary shear stress calculated with data from both survey procedures. Mean velocity values from MV data are computed using a spatial average and the boundary shear stress is found using the logarithmic law of the wall. The results indicate that MV data provides reasonable estimates of depth-averaged velocity characteristics; however, agreement for velocity profiles and shear stress, in particular, were found to be poor. Further work is needed to assess the role of MV survey procedures including the number of measurements collected and the duration of measurements.

Original languageEnglish
Title of host publicationProceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2014
PublisherCRC Press/Balkema
Pages355-360
Number of pages6
ISBN (Print)9781138026742
DOIs
StatePublished - 2014
Event7th International Conference on Fluvial Hydraulics, RIVER FLOW 2014 - Lausanne, Switzerland
Duration: Sep 3 2014Sep 5 2014

Publication series

NameProceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2014

Conference

Conference7th International Conference on Fluvial Hydraulics, RIVER FLOW 2014
Country/TerritorySwitzerland
CityLausanne
Period09/3/1409/5/14

Scopus Subject Areas

  • Nature and Landscape Conservation
  • Water Science and Technology

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