Author(s): Masakazu Hashimoto; Kenji Kawaike; Hajime Nakagawa; Nozomu Yoneyama
Keywords: Flood simulation; Pollutant transportation; Pollutant deposition; Pollutant distribution; Dhak
Abstract: This study assessed the spreading of pollutants during flooding in Dhaka City, Bangladesh, using a two-dimensional flood simulation model. We assumed that pollutants were produced within an industrial area located near by the river, and that they were transported with soil particles. The results showed that pollutant spreading and deposition mainly reflected flow conditionsduring flooding and topography. In low-lying areas, pollutant spreading was small and deposition was concentrated. However, for flat land areas, pollutants were distributedover a large area. These results confirm the importance of topographical data when assessing the movement of pollutants.