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随着城市化进程的加快,城市建设与经济持续高速发展,用水需求大幅增长。而城市发展和规模扩大带来的大量的硬化地面减少了雨水的渗透,雨季降雨量大时容易形成洪峰,导致城市部分区域内涝,同时城市绿化需求的增加也使水资源短缺形势严竣,供需矛盾日益尖锐。为充分收集利用雨水资源,实现雨水资源化、减轻城市洪涝和排水系统压力、改善和修复城市水环境,将雨水收集起来再利用是发展循环经济,实现水资源持续利用的一项重要措施。文章以绵阳规划展览馆雨水回收利用设计为例,详细阐述了雨水回收利用中的水量平衡及设计计算等内容。
With the acceleration of the process of urbanization, urban construction and economy continued to develop at a rapid rate, and the demand for water increased substantially. The large amount of hardened ground caused by the urban development and the expansion of scale has reduced the infiltration of rainwater. When the rainfall is heavy during the rainy season, flood peaks easily emerge, leading to waterlogging in some urban areas. At the same time, the increasing demand for urban afforestation also makes the water shortage severe, Contradictions increasingly sharp. In order to fully collect and utilize rainwater resources, realize rainwater resource utilization, reduce urban flood and drainage pressure, improve and repair urban water environment, collecting and reusing rainwater is an important measure to develop circular economy and achieve sustainable utilization of water resources. Taking the rainwater recycling design of Mianyang Planning Exhibition Center as an example, this paper elaborates the water balance and design calculation in rainwater recycling.