Modeling of access and spatial mobility changes associated with floods in the field of transportation and movement of vehicles in areas 3, 6 and 7 of Tehran

Abstract

The expansion of urbanization and the changing natural conditions of waterways increase the likelihood of flooding in cities. In this paper, we model the flood-sensitive areas for vehicle movement in areas 3, 6 and 7 of Tehran and determine the critical area of the critical tissue against floods using the AHP method, GIS and PSO algorithm. For this purpose, land use, rivers, roads, subways, population density, traffic density, altitude and slope are selected as effective flood parameters in areas 3, 6 and 7 of Tehran and weighting of these parameters in the Expert software environment. Choice done. Then the results were transferred to GIS software environment and a map of flood-sensitive areas in three areas 3, 6 and 7 was prepared for vehicle movement. The results of flood risk in areas 3, 6, and 7 in Tehran show that areas with very low risk are 0.5%, areas with low risk are 6.8% and areas with medium to high risk are 25.7%. This indicates the movement of the vehicle in case of flood risk in the 7th district of Tehran, which is due to population density, building (land use), proximity to the central area to the canal, and the lack of proper drainage. While using the PSO algorithm, districts 6 and 7 of Tehran are flood-prone areas.