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<br />variations in flow, sediment transpoJ:"t and channel geometry are computed <br />following an iterative procedure. Water routing, which is coupled with the <br />changing curvature, is assumed to be uncoupled from the sediment processes <br />since sediment movement and changes in channel geometry are slow in <br />comparison to the flow hydraulics. Flow chart showing major steps of the <br />computation is given in Fig. 2. <br /> <br /> <br />Enterinputdata <br /> <br />tst+ III <br /> <br />Water routing <br /> <br />Sediment routing <br /> <br />Adjustments in width. bed proflkJ <br />and changes clue to curvature effect <br /> <br /> <br />No <br /> <br />Fig. 2 Flow chart showing major <br />steps of computation for <br />FWVIAL model <br /> <br />VI. ~TER ROO'l'IlG <br /> <br />water routing provides temporal and spatial variations of the stage, <br />discharge, energy gradient and other hydraulic parameters in the channel. <br />The water routing component has the following two major features: (1) <br />Numerical solution of the continuity and momentum equation for longitudinal <br />flow, (2) evaluation of flow resistance due to longitudinal and transverse <br />flows, and (3) upstream and downstream boundary conditions. The continuity <br />and momentum equations in the longitudinal direction are <br /> <br />~A dQ <br />-+--q=O <br />at Os <br /> <br />(1) <br /> <br />10 <br />