Author(s)

R. Moussa & C. Bouquillon

Abstract

The diffusive wave equation is generally used in flood routing in rivers. We developed a modified form of this equation and proposed a new finite- differences resolution algorithm which is better adapted to flood routing along a complex river network. The new algorithm solve the diffusive wave equation in time then in space, opposed to the conventional approach of in space and then progressing in time. The accuracy of our new algorithm was compared to a traditional one by numerical experimentation and then applied to flood routing simulation over the Gardon d'Anduze catchment in South France. 1 Introduction The dynamic modeling of a one-dimensional unsteady flo

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