Sand Transport on Steeply Sloping Plane and Rippled Beds
Publication: Journal of Hydraulic Engineering
Volume 129, Issue 9
Abstract
Experiments on sand transport have been carried out in the Sloping Sediment Duct at HR Wallingford. The aim of the experiments was to investigate sediment transport mechanisms, for sand of varying degree of grading, on sloping beds. The Sloping Sediment Duct is a steady flow, recirculating duct, capable of generating mean flow speeds of up to 1 m/s and tilting to +/−30°. Twenty-two tests with two different sediments were conducted. Both sediments had a median grain size of about 0.23 mm but different standard deviations. Bed slopes up to +/−20° were used in the experiments. The results show that bedforms have a significant effect on the transport rate. Since the bedforms, in turn, are affected significantly by the slope, the relation between transport rate and slope is not a monotonic function. Maximum suspended transport rates were attained for downslope flows at angles of about 10°. The transport rate for widely graded sediment was significantly larger than that for well-sorted sediment for almost all flows and slopes.
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Information
Published In
Journal of Hydraulic Engineering
Volume 129 • Issue 9 • September 2003
Pages: 706 - 719
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Nov 14, 2000
Accepted: Mar 28, 2003
Published online: Aug 15, 2003
Published in print: Sep 2003
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