1雨水利用的概念地球上一切形式的水资源都来自雨水。从这个意义上讲,所有水资源的开发利用工程都可以称为对雨水的利用。这里所说的雨水利用是指对原始状态下的雨水进行利用,或对雨水在最初转化阶段时的利用。至于对雨水经过多次转化形成的其它形式的水资源,以及具有较大流域面积河流中的径流利用,则不属于雨水利用的范畴。雨水利用从狭义上说,就是收集、贮存并利用雨水;从广义上讲,则应包括雨水的渗透、回灌、补充地 1 Concept of Rainwater Utilization All forms of water on Earth come from rainwater. In this sense, all water resources development and utilization projects can be called rainwater utilization. The use of rainwater here refers to the utilization of rainwater in the original state or the use of rainwater in the initial conversion stage. Other forms of water resources that have been converted to rainwater for many times, and runoff utilization in rivers with larger catchments, are not covered by rainwater use. Rainwater use narrowly refers to the collection, storage and utilization of rainwater; in a broad sense, it should include the infiltration, recharge and replenishment of rainwater