The rapid development of the city have generated a series of problems concerning water. On the one hand, with the concentration of people and economical activities, the building area of the city is constantly expanding, adding to impervious ground surface, making the the city’s storm runoff floods a serious problem that can not be ignored. On the other hand, urban water resources is insufficiency urgently demands the search of new water resources. Rainwater resources, as water resources that are slightly polluted, can be used for a domestic and industrial purposes after ordinary treatment. Thus increasing the utilizing rate of urban rainfall resource, avoiding rainwater floods, and at the same time increasing the utilization of urban water resources, this will makes for an effective water-saving measure while constructing water-saving city.
This thesis have mainly discussed the problem of urban rainwater collection and utilization. On the basis of resorting to large amounts of relevant documents both home and abroad, having analysed the relationship between urban water resources and urban rainwater collection and utilization, the influences of ubanlization to urban rainwater collection and utilization, and the main ways of city rainwater collection and utilization. Through the calculation of Hefei’s precipitation, and the rainfall characteristics of the region from the respects of rainwater utilization, as well as its effects on urban rainwater collection and utilization. In the end, taking the Nanyan Lake campus of Hefei University as an example, through precipitation caculation, collecable rainwater caculation and water consumption analysis, this thesis put forward the scheme of rainwater collection and utilization.