Waterlogging waterlogging of flooding every year in mid-What is the bottom line?
May 7, 2010, the night a rainstorm flooding Guangzhou Yellowstone Park
During heavy rain, and Guangzhou will see Shuijin Jie. Since May of this year, after another attack in the rain, the Guangzhou into a flood plain, main road deep enough to boating. The public can not help but doubt, waterlogging every year in Guangzhou every year is still flooded, this is why?
Recently, the Guangzhou municipal water departments in an interview which revealed the whole story: As the higher standards of urban drainage, the higher construction costs, but also consider other issues such as land. Therefore, in the "tolerable range," Water is more inclined to adopt temporary emergency departments, emergency warning and other "non-engineering measures" (China News). Really respect the relevant departments of the bearing, really "stomach to be able to pole a boat."
According to China's "urban outdoor drainage design" requirement, drainage network must be designed to achieve 3 to 5 year return period standard. At present, Guangzhou city center more than 6000 km of existing drainage network to reach the standard of once a year and only 83% of the total, to two years and only once-standard 9% of the total. If the comprehensive transformation of urban drainage network, it will undoubtedly be a great investment. Compared with this, "non-engineering measures" obviously cost more than smaller.
However, in the global context of climate warming, weather disasters, strength, sudden strong. When the storm hit frequently when the rapid expansion of cities, urban waterlogging tolerance of urban construction costs by saving less and less. In the big storms hit, when the city of Guangzhou, fragile drainage system without the power of resistance. Only 7 May storm center of Guangzhou City 118 let lots of flooding waterlogging occurs, preliminary statistics about the city's economic losses of 543.8 million yuan, the city of Guangzhou in 2009 has exceeded the amount of water logging half the funding for special treatment. We must ask the relevant departments of the urban waterlogging tolerance what is the bottom line in the end?
And the majority of our cities, many cities developed waterlogging is zero tolerance. They attach great importance to the city drainage system, urban low incidence of waterlogging. For example, in Hamburg, Germany has a great capacity of aquifer reserve bank, flood not only guarantee the smooth water, but also realize the rational use of water. The sewers of Paris, France, in Paris are 50 meters below the surface, awash with pools, dense spider web, total length 2347 km, the ground water to be quickly without trace. Qingdao in China, the old town 100 years before the drainage system built by the Germans, until now, the system is still running very smooth, almost no waterlogging occurred.
May 9, Mayor of Guangzhou Wan Qingliang in Guangzhou, the three anti-hosted an emergency meeting, said the work, "57" Storm made three research topics: one study to improve flood control and drainage standards, to further enhance the advanced awareness of the flood disaster in the original basis, to improve embankment, city streets, underground space, flood control and drainage standards; second is the level of research to improve emergency response; third is to improve emergency response and rescue capabilities.
Treatment in addition to root, then why should no longer brook the city waterlogging.
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