Cause and solution for false upstream boat velocities measured with a StreamPro acoustic doppler current profiler

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Abstract

In 2003, Teledyne RD Instruments introduced the StreamPro acoustic Doppler current profiler which does not include an internal compass. During stationary moving-bed tests the StreamPro often tends to swim or kite from the end of the tether (the instrument rotates then moves laterally in the direction of the rotation). Because the StreamPro does not have an internal compass, it cannot account for the rotation. This rotation and lateral movement of the StreamPro on the end of the tether generates a false upstream velocity, which cannot be easily distinguished from a moving-bed bias velocity. A field test was completed to demonstrate that this rotation and lateral movement causes a false upstream boat velocity. The vector dot product of the boat velocity and the unit vector of the depth-averaged water velocity is shown to be an effective method to account for the effect of the rotation and lateral movement.

Additional publication details

Publication type Conference Paper
Publication Subtype Conference Paper
Title Cause and solution for false upstream boat velocities measured with a StreamPro acoustic doppler current profiler
Year Published 2007
Language English
Publisher American Society of Civil Engineers
Contributing office(s) Office of Surface Water
Description 6 p.
Larger Work Type Conference Paper
Larger Work Title Proceedings of Hydraulic Measurements & Experimental Methods 2007 Conference
Conference Title Hydraulic Measurements & Experimental Methods 2007 Conference
Conference Location Lake Placid, New York
Conference Date September 10-12 2007
Online Only (Y/N) N
Additional Online Files (Y/N) N