建筑与小区雨水利用工程规模的分析

Study on Rainwater Utilization Engineering Size in Building and Community

建筑与小区雨水利用工程主要由雨水入渗设施和雨水收集回用设施构成。雨水利用工程的规模应该有设置标准，规模过小则雨水径流流失，雨水资源得不到充分合理利用；规模过大，则浪费投资。雨水利用量应按重现期为1～2年设计，收集回用设施供水管网的规模应达到3d用水量不小于集水面日雨水径流量，雨水蓄水池容积不宜小于集水面日雨水径流量。雨水入渗设施的规模应满足日渗透量不小于汇水面上的日雨水径流量，储存设施的有效容积宜不小于渗透面上的日产流雨水量。

Rainwater utilization engineering in building and community contains rainwater infiltra- tion facility and rainwater collection and reuse facility. Standard for sizing rainwater utilization engineer- ing is necessary. Rainwater runoff is lost, and the resource is not sufficiently utilized if the size is too small. The investment is wasted if the size is too big. The quantity of rainwater collection should be cal- culated according to rainfall recurrence interval of 1 to 2 years. The rainwater supply system should be so sized that rainwater consumption of 3 days is not less than daily collected rainwater. Volume of rainwater tank should storage daily collected rainwater. Infiltration facility should be sized according to that daily infiltration is not less than daily rainwater runoff. The effective volume of storage facility should be not less than daily produced rainwater.