The Liujiang is polluted because industries and the city drainage system directly discharge into it significant raw sewage and rainwater.
由于工业企业和城市排水系统直接向江中排放大量未经处理的污水和雨水，使柳江受到污染。
A drainage basin is the area where these tributaries collect rainwater. A river with all its tributaries is called a river system.
流域是支流蓄水的区域。一条河流连同它的全部支流一起，叫做水系。
To resolve urban storm issues only through discharging in the past years, which resulted lots of rainwater flowing away through municipal drainage system.
解决城市暴雨问题，过去一味强调疏与排，这样做的结果是大量雨水从城市排水系统流走了。
The drainage function of split-flow rainwater system is affected by non-rainwater inflow, and directly discharging the mixed wastewater can cause serious pollution of receiving bodies.
分流制雨水系统的非雨水入流不但影响其正常的排涝功能，而且混接污水的直接排放还易导致受纳水体的严重污染。
Siphon drainage system is applied to the roofing rainwater drainage of Guangzhou International Conference and Exhibition Center.
广州国际会议展览中心屋面雨水排水采用虹吸排水系统。
In order to solve the problem of pollution in confluence drainage system, which is caused by initial rainwater, setting storage pond under the drainage pumping station is a effective measure.
在合流制排水系统中，排水泵站中设置调蓄池是解决城市初期雨水对水体污染的有效措施。
The results indicate that the perforated pavement and perforated rainwater drainage pipe system reduce run off and replenish underground water remarkably.
试验结果表明，采用透水铺盖面及渗透式雨水管道系统，对削减径流、补充地下水源有显著效果。
The results indicate that the perforated pavement and perforated rainwater drainage pipe system reduce run off and replenish underground water remarkably.
试验结果表明，采用透水铺盖面及渗透式雨水管道系统，对削减径流、补充地下水源有显著效果。
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