Evaluation of the multiple land use impact on flood flow using hydrological models

In recent years, the growth of the population and the increase in human activities, followed by the rise of greenhouse gases, have caused an increase in the temperature of the earth's surface and, as a result, various environmental hazards. One of the most important risks is sudden floods. Also, the growth of cities has reduced the permeability of the soil and caused the speed and intensity of floods to increase in urban areas. Therefore, planning to control floods and identifying urban areas at risk of flooding can prevent financial and human losses in the future. In this research, flood modeling has been done using hydrological models in the Bahuklat region. Data such as multiple land use, soil type, digital elevation model (DEM), rainfall data, and maximum flood flow data have been used. The SCS-CN model has been used to determine soil permeability, and the HEC-HMS model has been used to model and calculate the maximum flood flow. The results of flood modeling according to the observed values of the maximum flood flow showed that the HEC-HMS model could calculate the maximum flood flow with an accuracy of ۹۸.۲۴%.

Keywords:

flood , multiple land use , hydrological model , SCS-CN , HEC-HMS