CONSTRUCTION OF A FLOOD ANALYSIS MODEL CONSIDERING THE EFFECT OF ANISOTROPY OF POROSITY IN A CALCULATION GRID

Abstract

 To conduct the numerical simulation accurately in urban area including houses or buildings, research on increasing the accuracy of two-dimensional (2D) flood inundation model is necessary. The objective of this study is to grasp the effect of anisotropy of porosity in calculation grid on a flood inundation pattern by comparing a hydraulic model experiment with numerical simulations by a 2D flood inundation model which includes an anisotropic porosity in each grid. In numerical simulations, anisotropy was represented by considering an anisotropic porosity model comparing with experiments. It is expected to improve the calculation accuracy by giving an appropriate anisotropic porosity to the model developed in this study.