Application of the Upwind Scheme to the Flow of Dam Spillway

The upwind model is well known to simulate the shockwave, but it is not commonly applied to natural rivers because of the problems related to the source terms. Although several kinds of methods dealing with the source terms have been developed, currently there is no method applied to natural rivers. This paper deals with application of the upwind model to the dam spillway flow. The implicit upwind model is applied to dam spillway with irregular bed and width. Furthermore, steady state flow are simulated to prove the accuracy and applicability of the implicit upwind model. As the results of the application, this model is proved to be able to simulate spillway flows with high accuracy and robustness.