Speaking of the sewer, I believe we all remember "speed and passion" in the sewer escape, sewer than a high one, we read in many foreign movies, sewers are masters of the essential way to escape. If the movie "The Shawshank Redemption" master is across the sewer and escape; and the "prison break", the hero back perplexing prison sewer map, believe a lot of people still remember. The sewers of Vienna company manager Gottschall will even sewers developed into a tourist attraction, now in Europe the "hardcore" tourism has been more and more people welcome. In Chinese truly "sewer", only 100 years ago, the Germans in the construction of the Qingdao of it. This part of the sewer is highest can reach 2.5 meters, width of 3 meters. Sewer arch wall of every few meters will have a diameter of thirty or forty centimeters of water, some on both sides, some in the overhead. At a node of the sewers, a 6 step of the sewer is divided into two layers, the upper and lower two water gap is very big, and the left and right sides also have a width of about one metre of water, the whole node space is wide, like an underground houses.

I believe we all remember Shanxi in July 29th this year, Taiyuan in a field down after the rain, the road into the rolling waves of water "the lake" scene. Not only in Taiyuan, the metropolis "water", the Beijing round "water dream", the Shanghai subway is "water curtain cave", Wuhan University, Hangzhou West Lake "playground Tour" reproduction "of water diffuse this mountain". So much of the city are generally appear in city.

Our government may not notice? Of course not, why so? I think the reason is in many aspects. The new Chinese was founded, founders in the field of city construction experience is a blank, so the construction of city drainage system experience is from the "Soviet elder brother" to learn. Beijing, Guangzhou, Shenyang, Tianjin, wuhan...... A number of key city and the emerging industrial city, is in the Soviet Union experts under the guidance of the construction of the modern drainage engineering, the Soviet Union's "underground pipe type" drainage facilities have been copied to the country. The drainage pipe with small caliber, carrying capacity is very limited, difficult to deal with large amount of water. The Soviet high latitude, less precipitation, the problem is not prominent, but our country is located in the monsoon belt, Eastern and central parts of the most monsoon climate, summer and autumn precipitation, Guangzhou is as high as 1600 mm. Moreover, city sewage, rainwater drainage system weight light construction in our country, most of the city did not rain pipe special, water and sewer pipes is basically is mixed together. Research and our research also focused on the sewage treatment technology, and pay close attention to the city's drainage network area is insufficient, therefore, is the only "sewer" instead of "sewer" in most of the city China.

National City water supply and drainage engineering technology research center chief engineer Zheng Xingcan said, "pay close attention to the city drainage problems, not just staring at the horizontal drainage pipe, a lot of the problem is not in the pipeline, but the city itself." Indeed, in the process of continuous development of our city, lake and river, grassland, bare land has been occupied for construction land. A large number of people using cement, asphalt, concrete and other materials to cover the soil surface, forming a closed surface of large area almost completely impermeable, fall to the ground water to the soil infiltration, the formation of the ground water, and then a heavy rain, the flooded city is behoove. In addition, "Rain Island Effect" is also essential to the role of city waterlogging play. Similar to our familiar "heat island effect", "Rain Island Effect" is also accompanied by a city health, its remarkable characteristic is compared with the surrounding area, city of local rainfall increased significantly increased the number of times, rain, hail and rain also increases accordingly. "In recent years, Beijing City precipitation more than suburban plain trend has become increasingly evident. Since 90's of last century, the city more than 60 mm annual rainfall than the suburbs, equivalent to a year more than a storm rainfall." Liu Yankai said. Also, you can not help but ask, the government and we don't know? No, they knew, however, they will still be the ground bright city construction as the only performance standards, as far as I know, some city will spend up to billion yuan of funds to build a has not existed for many years the Stupa, face job and terrible! Reflected in the deeper problems, our government officials are not respect human rights, not cherish life, if really love life, respect for human rights, it should put the people's lives and property look at all of the above, then the city waterlogging problems early on so serious a ministry. Of course, our country city waterlogging legal blank, the relevant laws and regulations is not perfect is a major problem.

Is it in the existing conditions, we really can not cope with the storm? No, yes, in Beijing "7.24" torrential rain, the Beijing meteorological bureau 3 days in advance warning, the flood control command center mayor personally took joint action, the relevant government departments, more than 5000 cadres and workers together to mobilize, to successfully deal with the heavy rain, we are just eight words: timely warning effective, action.