Channel Routing in Open-Channel Flows with Surges
Publication: Journal of Hydraulic Engineering
Volume 127, Issue 2
Abstract
Using numerical models for the purpose of channel-routing calculation has been well accepted in engineering practice. However, most traditional models fail to predict the transcritical flows because of numerical instability. This paper presents two high-resolution, shock-capturing schemes for the simulation of 1D, rapidly varied open-channel flows. The present schemes incorporate the method of characteristics to deal with the unsteady boundary conditions. Also, the Strang-type splitting operator is used to include the effects of bottom slope and friction terms. To assess the performance of the proposed algorithms, several steady and unsteady problems are simulated to verify the accuracy and robustness in capturing strong shocks in open-channel flows. Furthermore, the results of dynamic flood routing and steady routing are compared to demonstrate the risk of using steady routing for flood mitigation.
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Information & Authors
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Published In
Journal of Hydraulic Engineering
Volume 127 • Issue 2 • February 2001
Pages: 115 - 122
History
Received: Aug 17, 1998
Published online: Feb 1, 2001
Published in print: Feb 2001
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