Abstract: 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.

Key words: Natural secondary forest, Snow/wind damage, Disaster