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| n a compound channel, the intense momentum transfer on the vertical interface between main channel and flood plain, makes its conveyance capacity decrease. For steady, uniform and turbulent flow, two new concepts, transverse kinetic energy correction coefficient (TKECC) and kinetic energy loss rate (KELR), are put forward in the paper. By the analysis of mechanics of transverse kinetic energy loss, the expression of transverse kinetic energy loss is obtained. According to the mechanics analysis, the two new concepts can reflect the transverse kinetic energy loss intensity in a channel with complex cross section. In the meanwhile, a conclusion is drawn that TKECC is larger than 1 and KELR is larger than 0 in compound channels. By analyzing a large number of experimental data from Science and Engineering Research Council Flood Channel Facility (SERC-FCF), it is found that TKECC and KELR are both related to shapes of cross section and relative depth (Dr). For a given relative depth, kine |
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| Keywords:Compound channels, Momentum transfer, Transverse kinetic energy correction coefficient, Kinetic energy loss rate, Shapes of cross section, Relative depth |
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