On the Applicability of CRD Schemes in Steep Gradient River

Abstract

Stream flows with steep gradient bed form complicating flow configurations, where super-critical and sub-critical flows co-exist. Computing numerically such flows are the key to successful river management. Contour-integral-based residual distribution, CRD, schemes are one of the numerical computation to simulate the flow with shock waves. In the last fiscal year, the Authors applied the CRD schemes to one dimension and two dimensions of the open channel flow, and showed validity as compared with the experiment-with-a-model result or the theoretical value. However, in the paper, application has not carried out the CRD schemes to a natural river. In this paper, the CRD schemes are applied for the Toyohira River of a steep slope municipal river, and the applicability in a natural river is shown.