北京是一个资源型严重缺水的城市,同时又是一个排除洪涝十分困难的内陆城市。水资源与防洪之间有着尖锐的矛盾,因此,面临着如何对待洪水的问题。北京属于典型的温带半湿润大陆性季风气候,夏季炎热多雨,全年降水80%以上集中在汛期,汛期集中大暴雨。暴雨积涝具有易发、多发特征,且暴雨中心多发生在城近郊区。所以,抓住了汛期的降雨是雨洪利用的关键所在。 Beijing is a resource-poor city with a serious shortage of water and is also an inland city with very difficult floods. There is a sharp contradiction between water resources and flood control, therefore, facing the issue of how to deal with floods. Beijing is a typical temperate semi-humid continental monsoon climate, hot and humid in summer, more than 80% of the annual rainfall concentrated in the flood season, heavy rain concentrated in the flood season. Storm waterlogging is prone to occur, multiple features, and heavy rain center occurred in the suburbs of the city. Therefore, capturing the rainy season rainfall is the key to the use of rain.