Abstract:In order to study different effects of land use patterns on runoff generation and quantitatively evaluate the influence of land use on the change of the ecological environment in the Huaihe Basin, we selected the Dapoling Hydrological Station in the upper reaches of the Huaihe Basin as the study area, and used the improved Xin’anjiang model to simulate the flood processes at a scale of half an hour based on land use, meteorological, and hydrological data from the 1990s and the 2000s. We also analyzed the influence of land use change on the flood events in the study area. The results show that, under constant conditions of precipitation, the runoff, peak discharge, runoff modulus, runoff coefficient, and groundwater runoff proportion all increased during the period from the 1990s to the 2000s.