Application of the HEC-HMS Model for Flood Simulation in Ungauged Mountainous Area

Flash floods occurred frequently in Chinese mountainous areas, that most of the areas had no hydrological station network control. The flood forecasting was crucial for the flash flood disaster warning, prevention and control. In this paper we selected Zhudong River watershed of Pingdu City in China to investigate the application of the HEC-HMS model for flood forecasting in ungauged mountainous area. The design floods of the typical villages in the small watershed were calculated with the HEC-HMS model, and the calculation results were compared with those of the reasoning formula method and the instantaneous unit hydrograph method. The results proved that HEC-HMS model was suitable for the study small watershed and was a powerful tool for flood forecasting in ungauged mountainous area.