Improvement Effects of Urban Flood Control Scenarios

Due to rapid urbanization and increased torrential rainfall, flooding in urban areas has continued. Because of population concentration and high-density urban infrastructure development, large-scale improvement of stormwater pipes in urban areas is limited; therefore, when flooding occurs, the scale of damage is relatively large. In particular, flood damage is more severe in areas with gentle surface slopes, where natural drainage into rivers is difficult. In this study, flood reduction effects were analyzed for a scenario consisting of improved pump control rules at urban stormwater pump stations, improvement of reverse-slope pipes in some flood-prone low-lying areas, and the distributed arrangement and combination of small-scale detention ponds. As a result of the simulation, it was found that the amount of flood overflow in the city was greatly reduced under a feasible flood control reinforcement plan.