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结合无锡某厂区的防洪和雨水利用,根据厂区的地形、建设方案和市政规划,分析内涝的产生与山体洪水的威胁,计算排洪沟的尺寸,进行防洪和山体雨水利用设计,年可收集山体雨水量约4 711 m~3。通过年均水量平衡计算,厂区屋面年雨水收集量17 812 m~3,除满足景观及绿化用水外,有10 245 m~3可用于生产用水,使厂区径流系数减少52%。逐月计算水景、绿化、雨水收集及雨水处理系统的水量平衡,年可以收集利用22 523 m~3雨水,节约水费10万余元。
Combining the flood control and rainwater utilization in a factory in Wuxi, according to the topography, construction plan and municipal planning of the factory area, the analysis of the occurrence of waterlogging and the threat of mountain flood, the calculation of the size of the flood drain and the design of flood control and mountain rainwater utilization, Rainfall is about 4 711 m ~ 3. According to the annual average water balance calculation, the annual precipitation of rainwater in the roof of the factory is 17,812 m ~ 3. In addition to satisfying the landscape and green water, 10,245 m ~ 3 can be used for production water, reducing the runoff coefficient of the plant area by 52%. Calculate the monthly water balance of water features, afforestation, rainwater collection and rainwater treatment system monthly, and collect and use 22 523 m 3 rainwater annually to save 10 million yuan of water.