1郑州市雨水资源利用的目的和意义我国是世界上最为贫水的国家之一,人均占有水量为世界的1/4,郑州市的人均水资源占有量仅为220m~3,占全国人均水资源量的1/10。做为中原城市群的“龙头”,水资源不足成了郑州市经济发展的“瓶颈”。与此不相谐调的是,随着城市化进程的加快,不透水面积不断扩大,径流系数增大,径流量增加,大量雨水资源白白流走,不仅加重排水管网的负荷,发生内涝灾害,同时也造成水资源的无形浪费。因此,如何利用丰富的雨水 1 Purpose and Significance of Utilization of Rainwater Resources in Zhengzhou China is one of the most water-poor countries in the world with a per-capita water consumption of 1/4 of the world’s total. The water resources per capita in Zhengzhou City is only 220m 3, accounting for the national per capita water consumption 1/10 of the amount of resources. As a “leader” of the Central Plains city group, water shortage has become a “bottleneck” in the economic development of Zhengzhou. In spite of this, with the accelerating process of urbanization, impervious areas have been expanding continuously, runoff coefficients have increased, runoff has increased, and a great deal of rainwater has gone away. This has not only aggravated the load on the drainage network and caused waterlogging disasters, At the same time also resulted in the intangible waste of water resources. Therefore, how to use abundant rainwater