引言 城市建筑物和道路面积的不断增大,导致了城市内地面的不透水面积的增加,径流雨水量也随之增加。目前我国水资源极度短缺,却未能有效利用雨水资源。而日本和德国等发达国家在80年代初第九届国际雨水收集系统会议以来,就掀起了利用雨水的热潮。这是一种新的开源节流技术,有利于改善城市的生态环境。 Introduction Increasing urban buildings and road areas have led to an increase in the impervious area of ​​the city’s surface and increased runoff rainfall. At present, China’s water resources are in short supply, but it fails to effectively utilize rainwater resources. Developed countries such as Japan and Germany have set off a wave of rainwater utilization since the Ninth International Conference on Rainwater Harvesting Systems in the early 1980s. This is a new type of technology that increases revenue and reduces expenditure and helps to improve the city’s ecological environment.