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Sponge urban construction will pull over trillion of investment, Market Economy Research Institute Ren Xingzhou State Council Development Research Center, said the State Council executive meeting to speed up the deployment of sponge urban construction, to effectively promote the new urbanization, and had kicked off National City underground pipe Gallery, squatter settlements, renovation of dilapidated buildings complementary role in boosting the economy should not be underestimated. Pull over trillion of investment? With the new advance of urbanization, the construction of underground cities have gradually gained importance. The so-called sponge city, Deputy Director of the Department of Housing and Urban Construction Division Zhang Lin Wei has explained, does not refer to a project, but an idea, from the 'source reduction, process control, system management,' to proceed through urban planning, construction management and control comprehensive use of 'infiltration, stagnation, storage net, with, row' and other engineering and technical measures to control urban stormwater runoff, low impact urban development (LID), minimizing urban development since the original natural behavior the hydrographic features and water damage to the ecological environment of the urban construction as the 'natural reservoir, natural infiltration, natural purification' and 'cavernous.' Image representations that city like a sponge, encountered rain can be absorbed either on site or nearby, memory storage, infiltration, purify rainwater, groundwater recharge, regulate the water cycle; when the arid conditions of the water released from the reservoir, and utilized. According to the above definition, chapter Lim also integrated practice low-impact development and construction projects have been carried out all over, the sponge Urban Construction Investment conducted investment estimates. Sponge the city's construction needs permeability, hysteresis, storage net, use, discharge and other engineering and technical facilities, including waterlogging drainage facilities, urban sewage pipe network construction, rain and sewage diversion transformation, rainwater harvesting facilities, wastewater recycling, leakage pipe network transformation, etc., with a total construction cost of about 160 million -1.8 in one hundred million yuan / square kilometer. Wherein permeability, hysteresis, and other storage source reduction projects accounted for about one-third of the investment. September 29, the State Council executive meeting, the city should be combined with a sponge shantytowns, renovation of dilapidated buildings and the old district updated and underground pipe gallery combined with the building, from this year, to the new district in the city, various parks, to piece promoting Development sponge urban construction, in