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Application of the loop method for correcting acoustic doppler current profiler discharge measurements biased by sediment transport

July 5, 2006

A systematic bias in discharge measurements made with an acoustic Doppler current profiler (ADCP) is attributed to the movement of sediment near the streambed-an issue widely acknowledged by the scientific community. This systematic bias leads to an underestimation of measured velocity and discharge. The integration of a differentially corrected Global Positioning System (DGPS) to track the movement of the ADCP can be used to avoid the systematic bias associated with a moving bed. DGPS systems, however, cannot provide consistently accurate positions because of multipath errors and satellite signal reception problems on waterways with dense tree canopy along the banks, in deep valleys or canyons, and near bridges. An alternative method of correcting for the moving-bed bias was investigated by the U.S. Geological Survey.

Citation Information

Publication Year 2006
Title Application of the loop method for correcting acoustic doppler current profiler discharge measurements biased by sediment transport
DOI 10.3133/sir20065079
Authors David S. Mueller, Chad R. Wagner
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Scientific Investigations Report
Series Number 2006-5079
Index ID sir20065079
Record Source USGS Publications Warehouse
USGS Organization

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