Determination of possible waterlogging points of drainage network of Fooladshahr city in urban flood

Nowdays, more than half of the worldchr('39')s population lives in urban areas, increasing land use change leads to an increase in impermeable land, which greatly reduces the possibility of rainwater infiltration into the land. In this study, Fooladshahr city of Isfahan province was selected as the study area to determine possible flooding points. Previous studies and experimental methods were used to calculate focus time. The SWMM model was used to identify flood sensitive points and the model was implemented for different return periods. The results showed that channels 2, 16, 17, 25 and 31 are sensitive to flooding for a return period of 25 years. In order to calibrate and validate the model, 3 rainfall events were measured on 9.02.2020, 20.02.2020 and 30.04.2020. In these events, depth, flow and velocity were measured and compared with the results of the model. Took. In the calibration and validation process, the NS criterion value was higher than 0.5 in all cases, and the evaluation results showed a good agreement between flow rate, speed and depth. Therefore, in this study, the SWMM model has sufficient ability to predict flood risk and manage the watershed and prioritize areas to solve the problem of flooding.