城市雨水资源化及其生态环境效应

城市化发展，城市地表水严重污染、地下水超量开采，开发利用城市雨水资源势在必行。雨水是一种最根本、最直接、最经济的水资源。可通过建造雨水贮留设施、就地下渗、回灌、屋面雨水拦裁、蓄集、绿化工程等多种途径实现雨水资源化。充分开发利用雨水资源不仅可以解决城市水资源危机，而且还会带来诸如：涵养地下水、缓解和恢复地面沉降、调节气候、净化空气、强化城市绿化、改善城市环境、改变城市排水系统、防治雨洪灾害等一系列生态环境效应。

Urban rainfall resources utilization and its effects on eco-environment

With development of urbanization, serious contamination of surface water and over exploration of groundwater have made exploration and utilization of urban rainwater resources the most important thing to do at present. Rainwater, one of the most essential, direct and economical resources could be utilized through the following aspects: establishing storage installation to collect rainwater, making rainwater infiltrate on the spot or recharge to groundwater, and building green roof system to intercept and catch rainwater. From above ways, rainwater could be used widely and fully.Thus, it may not only solve the problem of urban water resource crisis, but also brings a series of good eco environmental effects, such as to conserve groundwater, mitigate and reinstate ground subsidence, regulate climate, help to extend green areas, make air clearn and city more beautiful and even effectively control over floodwater damages etc.