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Title: Design of straight and meandering compound channels : interim guidelines on hand calculation methodology
Author: J.B. Wark
Author: C.S. James
Author: P. Ackers
Document Type: Monograph
A compound channel consists of a main channel, which accommodates normal flows, flanked on one or both sides by a flood plain which is inundated during high flows. For water levels above the flood plain, the flow is strongly influenced by the interaction between the fast flowing water in the main channel and the relatively slow flowing water over the flood plains. This significantly complicates the estimation of stage discharge relationships. The extra turbulence generated by the flow interaction introduces energy loss over and above that associated with boundary resistance. This is not accounted for by the conventional resistance equations such as Chezy, Manning and Darcy Weisbach, and their direct application may result in considerable error. The procedures and guidelines given in this manual represent the best current state of knowledge and are an improvement on traditional methods. However, it must be recognised that these procedures have not been fully verified against field data. It is inevitable that practitioners will push the bounds of the advice and knowledge. Research is in progress on the behaviour of compound channels and it is expected that some of the procedures and guidelines given here may be superseded in the future.
Publisher: National Rivers Authority
Publication Date: 1993
Publication Place: Bristol
Subject Keywords: Hydraulic engineeringChannels (geography)FloodplainsDischarge (hydrology)Guidelines
Extent: 59; + appendices, tables and figures
Total file downloads: 333

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