既有建筑小区海绵城市改造效果评估

Effect evaluation of existing residential quarters renovation based on sponge city development

对基于海绵城市理念进行改造的两个既有建筑小区进行了效果评估,结果表明:对于设计标准为1年一遇的既有建筑小区,在采用海绵城市理念进行改造后,在连续10 h强降雨,日降雨总量达172.4 mm(超过10年一遇)的情况下,小区无明显积水现象。与同区域未经海绵城市改造的建筑小区对比,改造后小区出水井中雨水径流SS平均降低93.54%,COD平均降低88.86%,但对NH_(3)-N和TP去除效果不明显。

The effect of two existing residential quarters renovation based on sponge city development was evaluated,Even the recurrence interval of storm pipe is as low as one year,there were no obvious waterlogging during and after an torrential rain whose daily rainfall was 172.4 mm(the recurrence interval is over 10 years)after the renovation.Compared with a similar existing residential quarter,95.34% of SS and 88.86% of COD in the polluted rainwater could be removed by the sponge city facilities averagely,but no obvious removal result of NH_(3)-N and TP were obtained during the investigation.