Desenvolvimento de um programa computacional para estudar o risco de inundação: o caso de dois rios americanos

Abstract

This paper shows the theoretical aspects involving dynamic wave routing modeling in natural channels, with respect to channel lateral wall slope, and their influence in the study of risk flood areas near riverine systems. The development of the dynamic wave routing is briefly presented and the fundamental necessary conditions for its successful application to the process of delimitating vulnerable areas to floods are discussed and established. A computational model is developed and proposed to describe the discharge, water depth, cross-sectional area of flow and velocity behavior in natural channels, under the influence of this parameter. The proposed computational model uses an implicit finite difference scheme, whose results, when compared with other results presented in the literature, guarantee an excellent efficiency for the hydraulic parameters considered in each point of the mesh on the x-t plane. The program was applied in two American rivers, where it was verified the influences of their parameters in the flood plan studying.