Experimental Studies on Sedimentation Due to Water Withdrawal
Publication: Journal of Hydraulic Engineering
Volume 112, Issue 7
Abstract
A mathematical model is verified, which predicts aggradation and degradation effects as a result of water withdrawal from rivers or open channels. An experimental study in a large sediment flume, commissioned by the Netherlands' Rijkswaterstaat, was used to analyze the predictive value of the one‐dimensional mathematical model RIVMOR to assess bed‐level changes in the reaches up and downstream of the water intake. Comparison of the results of the mathematical model with the experimental data showed a good agreement with regard to both water‐level and bed‐level changes. It should be realized, however, that the conditions in the sediment flume could be controlled very accurately, facilitating a high level of precision in data collection and in the mathematical model simulation. In a natural river, the variability of discharge, flow resistance, and sediment transport, coupled with the generally poor theoretical description of the latter two aspects will result in less accurate predictions of bed‐level changes. Nevertheless, it can be concluded that the application of such mathematical models will give a reasonable insight into the long‐term aggradation and degradation and the resulting changes in stage and depth, provided they describe the river characteristics as regime, roughness, and sediment transport correctly.
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Published In
Journal of Hydraulic Engineering
Volume 112 • Issue 7 • July 1986
Pages: 641 - 656
Copyright
Copyright © 1986 ASCE.
History
Published online: Jul 1, 1986
Published in print: Jul 1986
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