Validation of Bed-Load Transport Measurements with Time-Sequenced Bathymetric Data
Publication: Journal of Hydraulic Engineering
Volume 137, Issue 7
Abstract
Advances in bathymetric data acquisition have made it possible to explore alternative methods for measuring bed-load transport in rivers. The method validated herein consists of measuring rates of bed scour by using time-sequenced bathymetric data. The validation is performed in a laboratory flume by comparing the measured rates of bed scour with direct measurements of bed-load transport. The bed forms in the flume are dunes traveling at nearly constant speed. The shape of the dunes remains nearly constant. No suspended load is present. The ranges for Froude and Rouse numbers are 0.24–0.50 and 4.6–10.4, respectively. The study shows that under the given conditions, bed-load transport determined from time-sequenced bathymetric data is equally accurate to that determined from measurements of bed-form amplitude and speed. Obtaining bed-load transport from time-sequenced bathymetric data is often more expedient than traditional methods.
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Acknowledgments
The research and data analysis presented herein were conducted under the sponsorship of the U.S. Army Corps of Engineers Engineer Research and Development Center (USACE-ERDC)USACE in cooperation with the Agricultural Research Service-National Sedimentation Laboratory (ARS-NSL) and the Iowa Institute of Hydraulic Research (IIHR) at the University of Iowa. Permission was granted by the Chief of Engineers to publish this information.
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Information
Published In
Journal of Hydraulic Engineering
Volume 137 • Issue 7 • July 2011
Pages: 723 - 728
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Sep 30, 2009
Accepted: Oct 28, 2010
Published online: Jan 3, 2011
Published in print: Jul 1, 2011
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