Nonlinear Channel Routing by Computer

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Abstract
A simple but accurate nonlinear river channel routing method is developed which can be calibrated from standard water survey measurements of stage-discharge and stage-velocity. The flow model is based on well-established kinematic flood wave behavior. The routing coefficients are not derived from analysis of the inflows and outflows to a given reach, instead the routing coefficients are derived directly from the stream gaging data for each reach, i.e., the stage-discharge and the stage-velocity curves. The routing procedures are computationally simple and are described by equations. It should be noted that because the procedure computes according to wave travel time, the storage term is purely wedge storage and this leads to part of the simplification. Because the procedure operates on changes in flow, an extremely simple reservoir routing-method is derived.

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