By traveling in the rain in the city, it is easy to think of a problem if rainfall does not discharge in a timely manner to do? Yes, if rainfall exceeds drainage water accumulated capacity could result in the city, which is what we usually call the urban waterlogging.

Responsible editor: Sun Ailin SN146

　　由雨水在城市中的旅行过程，我们很容易就想到一个问题；如果降雨不及时排出怎么办？是的，如果降雨超过城市排水能力会致使城市内产生积水，这种现象就是我们通常所说的城市内涝。

责任编辑：孙爱林 SN146