1D/1D+2D integrated model for urban inundation calculation and application for Nhieu Loc – Thi Nghe basin (HCM city)

Abstract

      This paper presents a mathematical model for detailed calculate the flooding flow in NhieuLoc – ThiNghe basin. The flow in sewers is considered as one-dimensional while overland flow is modeled using the 1D+2D integrated model. 1D flow was calculated from the Saint – Venant equations and 2D flow was calculated from the shallow water equations. The finite volume method was used. The linkage of models was received a necessary consideration. The application for NhieuLoc – ThiNghe basin case showed that the model could respond to the practical requirements.