关键词: 城市化, 土地利用, 洪水过程, 暴雨洪水管理模型, 济南

Abstract: Rapid urbanization has resulted in changes in the rainfall-runoff characteristics and increases in the risk of urban area flooding. This study examines the impact of land use changes caused by urbanization on rainfall-runoff processes through a case study of the Xiaoqing River basin in Jinan. We develop a storm water management model (SWMM) for different urbanization scenarios on the basis of land use data of 2000 to 2017 of the study area, and use the design rainfall events of different return periods as model input for analysis of the changes in flood processes. The results indicate that urbanization has produced a significant amplification effect on design rainfalls. During 2000-2017, the surface runoff of this area was increased by 42%, infiltration volume decreased by about 50%, runoff coefficient increased from 0.56 to 0.71, and peak flow increased from 285.7 to 311.7 m3/s. The peak time of floods at relatively high frequencies became earlier, while those at low frequencies changed little.

Key words: urbanization, landuse, flood process, storm water management model, Jinan City