上海添淇工程技术有限公司

Shanghai Tich Engineering Technology Co., Ltd.

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One, the "sponge City" Overview
Sponge city means the city can be like a sponge, having good "flexibility" to adapt to environmental change and response to natural disasters, etc., when it rained, water, water, water seepage, water purification, the water reservoir when required "release" and utilized. Sponge urban construction should follow the principle of ecological priority, so the natural ways and artificial combination of measures, to ensure urban drainage in flood safety of the premise, to maximize the accumulation of rainwater in urban areas, infiltration and purification, to promote the use of rainwater resources and ecological protection. Sponge process of urban construction, should co-ordinate natural precipitation, surface water and groundwater systems, coordination of water supply and drainage water recycling of the links, and consider its complexity and long term.
April 2, 2015 in the evening, according to the Ministry of Finance website news, sponges, urban construction pilot cities list officially announced. By Region score, rank in the top 16 cities are (according to administrative sequence order): Qian'an, Baicheng, Zhenjiang, Jiaxing, Chizhou, Xiamen, Pingxiang, Jinan, Hebi, Wuhan, Changde, Nanning, Chongqing, Suining, Gui'an New Area and the New West Ham.
I. Definitions
Sponge the city refers to the city can be like a sponge when precipitation, water can be achieved, storage and other functions, when required, and water can be released and utilized, so as to effectively alleviate the shortage of water resources between cities and urban waterlogging contradictions, and help repair the urban water environment.
Second, the significance of (Ecological City Construction)
1, social significance: the city like a sponge when it rained, water, water, water seepage, water purification, the water reservoir when required "release" and utilized. Natural ways and artificial combination of measures, to ensure urban drainage in flood safety of the premise, to maximize the accumulation of rainwater in urban areas, infiltration and purification, environmental protection and promoting the use of rainwater resources.
2. Economic Significance: According to the notification, the central government to give special sponge urban construction pilot grant funds, some three years, the specific amount of subsidy is determined by city size sub-file, the municipality 600 million yuan each year, the capital city of 500 million yuan every year, other cities every year 400 million yuan. PPP model for using a certain percentage of subsidy will be above 10% base rewards. Financial reporting format: the joint declaration pilot cities by the provincial finance, housing and urban construction, water conservancy departments, the Ministry of Finance, the Ministry of Housing and Urban Construction, Ministry of Water Resources of the declaration of cities eligible for review, public defense organizations, site assessment results released, and the pilot carry out the work performance evaluation, reward and punishment based on performance evaluation results. The evaluation results are good, 10% of central government subsidies base reward; poor evaluation results, clawing back central government subsidies. Specific performance evaluation measures to be enacted.
Third, background
According to incomplete statistics, over the past few years, more than 300 cities nationwide over waterlogging suffered a considerable part of which was serious waterlogging, casualties have occurred phenomenon, significant property damage. The reason is largely rainwater utilization systems are imperfect or non-compliance of the urban drainage system. According to the survey, China has more than 300 belonging to UN-HABITAT UNEP evaluation criteria "serious shortage" and "dry" city in the city water waterlogging occurs extraordinarily harsh.
OBSERVATIONS measures
1, we must first reverse the concept. Traditional city-building mode, everywhere is the hardening of the road. Times of heavy rain, mainly rely conduit, pumping stations and other "gray" to the drainage facilities, to "quickly ruled out" and "end-centralized" control as the main planning and design concepts, often resulting in heavy rains, floods, droughts and Sharp. According to "sponge City Construction Technology Guide" in the future will emphasize the priority use of city construction ditch grass, rain gardens, sunken green spaces and other "green" measures to organize for drainage, "slow-release row" and "decentralized source" as the main control planning and design concepts.
2, permeable paving roads forming cavernous. Sponge built city would have "cavernous." City "cavernous" includes both rivers, lakes, ponds and other water systems, including green spaces, gardens, permeable pavement such urban facilities. Rainwater through these "cavernous" infiltration, detention storage, purification, recycling, the last remaining part of the runoff through the pipe network, pumping stations efflux, which can effectively improve the standard of urban drainage systems, mitigation of urban waterlogging stress. Construction of sponge cities.
3, the key is to continuously improve the "cavernous" in size and quality. Original "cavernous" to be effectively protected. In the past, the pursuit of urban construction land Plains, often filling the flat plain. According to "sponge City Construction Technology Guide", should maximize the protection of the country affect the original rivers and lakes, wetlands, ponds, ditches and other "cavernous" from development activities; compromised "cavernous" should also be integrated through the use of physical, biological and ecological means of gradually repair and to maintain a certain percentage of ecological space. Conditions should also newly built a certain amount of "cavernous." According to "sponge City Construction Technology Guide," sponges to urban construction urban construction, residential, roads, squares and other green areas and construction as the carrier. For example, make the city roof "green up", "green" roof at the same time retained rain also play energy saving, ease the heat island effect. Roads, squares permeable pavement can be used, especially in cities should be fully green "sink."
V. DETAILED DESCRIPTION
For residential buildings, green roofs can make up to play at the same time retention of rainwater energy saving, ease the heat island effect. Greenbelt should "sink" so that rain water into the sunken green space regulation and storage, infiltration and purification, rather than directly through the sewer discharge. Landscape water district as flood storage, purification and utilization General rainwater. Sidewalks may be permeable paving, road green belt can sink if the green belt space, can also be introduced into the surrounding parkland pavement rain were consumptive. Urban green space and plaza should be built with rainwater storage multi-function "rainwater Park", the urban water system should have enough rainwater storage and discharge capacity, waterfront greenbelt should have the ability to clean up the city into the rain, water shore ecological revetment wire should be designed to improve the water system of self-purification capacity.
 Successful Case