[ ] , Why do some cities, especially in urban waterlogging
Rotterdam, the Netherlands flood control case (2010 Shanghai World Expo exhibitors cases), of course, the Netherlands, a rainy day, based on its unique geographical location, many of our cities, in order to take preventive measures, I’m afraid to concentrate spend, you usually can not see the underground pipe network construction. The role of the pipe network is not only drainage, you see many cities, spider web-like wires of the telephone pole and clouds of the sky are moving out of sight, they are running where to go? intensive and efficient, modern cities such as water, electricity, telecommunications, gas pipeline network, will be together, put into the public corridors of an underground pipe network, which we call
I remember a few years to go to Europe, visit an even side by side go two trucks and ditch, more precisely, this ditch, in fact, is a tunnel, in which the placement of lighting, reserve entrances, and at some distance, maintenance personnel do not have dug the road, you can always assembly pipeline and repair.
In fact, we can also see that this heavy rain in Guangdong, Guangzhou, stealing, Shenzhen without incident, this is not said that Shenzhen Fortunately, eighties and nineties of the last century, Shenzhen has also been flooded have bee even visiting foreign heads of state, people with boats to rescue from the hotel to go out. As the saying goes: eat to learn a lesson, Shenzhen From then on began to study how to solve the waterlogging. First, the dredging of the underground drainage system, the second is to increase the pumping station, trying to water to natural waterways row. These efforts usually difficult on the surface to be seen, but the critical moment, and played a big role.
Tianjin, crossing the Haihe the common ditch tunnel
most cities in the planning of the underground system, facing the biggest problem is some of the performance concept and utilitarian priority. The city’s planning and engineering, non-professional thinking, once dominant, could make the technical details are ignored, to rush period, the provincial capital, these remarkable places, most likely to be the first to sacrifice. Example, take the 1st line and second line of the Shanghai Metro One line is built by the German designer, the second line from the domestic construction completed, despite the large surface are similar, but put into operation, the second line the question came out: for example, the subway exit to prevent rainwater intrusion on the steps, had been omitted, the result of a rain, the subway is very easy to rainwater intrusion.
Of course, more people appear, is a road repaired, continue to be hired to be dredged, and even ordinary people to tell jokes: buried pipes and repair gas, as long as the pavement zipper a pull on the line extensive, like Shanghai, a city like Beijing, underground buried pipeline, and even the end of the Qing Dynasty, the early Republican, but the drawing is not find, that only the blind digging. Power between fragmented, over-protect their own interests and is really regrettable that the overall situation, it is the most troublesome problem in the urban governance compete like every department independent of the project budget, for example, the water company, he just do not want to Gas Company free-rider or the power company, the results with each other ventilation, a drill bit crushed, or else the water pipe to ringing off the hook, or put the cable Waduan …
The Shanghai World Expo, in addition to the ground outside the building, in fact, there is one of the biggest bright spot, but unable to show, that is, in its underground, buried up to several kilometers of common ditch, and the Expo project commander abandon someone’s child someone to hold It also gives the future of urban construction, has set a good example. But very unfortunately, when photos of all Expo show in people’s eyes, I actually found that no one on the common ditch.
I think, embedded an integrated common ditch is not difficult, the difficult we can not in the public interest to eliminate posed by a complex chain of interest against the system construction of the underground network. Just for the sake of a small profit, always is not a big account; vanity people will never understand what is real and common prosperity. the sewer Museum
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prompt: we can see, this heavy rain in Guangdong, Guangzhou, stealing, Shenzhen without incident, this is not to say that Shenzhen Fortunately, the eighties and nineties of the last century, Shenzhen also have flooded not to open to cross, even visiting foreign heads of state, people with boats to rescue out from the Hotel. As the saying goes: eat to learn a lesson, Shenzhen From then on began to study how to solve the waterlogging. The first half, South continuous rainfall, Guangzhou and other cities into swamps. Now,MBT Changa Shoes, water is dissipated, but severe waterlogging, so that the city pay a painful price, said that the Guangzhou City alone lost up to over one hundred billion. Guangdong Party Secretary Wang Yang said: I’m sorry people, to apologize. Although natural disasters can not be expected to be known as force majeure, however, after the disaster, in their own management to identify problems than the headlong onto God strong
the sewer Museum
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In contrast, many of our large cities, the whole article to do in the above ground – high-rise buildings to build a lot, because it embodies the city’s landscape, the achievements of outstanding leadership, but the underground? anyway you can not see, why spend more money wasted? The result is that the ground is a new society, the underground of the old society to catch up with the rain and snow typhoon to invisible, they begin to give you Tiandu.
In fact, the city waterlogging caused because there are many, such as Over the years, many cities in the concrete jungle, the surface hardening more and more serious, the water fell to the ground seepage does not go on, it became a run-off, totally dependent on the pipe network drainage. You may read Victor Hugo’s novel You know, a hundred years ago, the Paris sewers, diameter has been reached three meters, we can not help but admire, when Frenchman vision for the construction of public facilities. Underground drainage facilities? A long time, I left the impression, that is, a worker struggling Bala places to squeeze in repair, if even the people who get in, just take the reinforced poke, you said, this pipeline can to cope with the sudden large-scale rainfall?
but then again, in order to prevent the next storm, unlimited increase the caliber of the pipe network, with the excess investment to cope with a small probability event, but also does not seem economical, how do we go about it ? The Expo, the case of Rotterdam, the Netherlands, has given us provides a good reference – the Netherlands, the country, are in below sea level, high probability of occurrence of waterlogging, so people in the City made in advance set aside a lot of low-lying place, such as repair many Descented,MBT Tunisha Shoes, when it rains, when the city’s public space, it rained temporary play cistern water to these places cited, and then concentrated pumping row, or waiting for water, natural dry, which can be described as double-edged sword. Inexpensive, but the effect is good, and reflects the thinking of urban planning in advance.
Paris
Paris
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