In Five Years, a Quarter of Ningbo's Built-up Area Will Be a Sponge City; Underground Utility Tunnels to Exceed 100 Kilometers
2016-11-07
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Facing the two major problems of 'heavy rain causing disasters, light rain causing rivers' and 'zipper roads', building 'sponge cities' and 'underground utility tunnels' are the remedies.
On November 3, the reporter learned from the Ningbo Sponge City and Underground Utility Tunnel Construction Promotion Meeting about the latest progress and future goals of these two tasks.
Building a Sponge City: By 2018, no waterlogging from light rain, no flooding from heavy rain
The so-called 'sponge city' vividly means that the city, like a sponge, can absorb and release water resources freely. Currently in Ningbo, 'water pollution control', 'urban waterlogging prevention and control', and 'unconventional water resource utilization' have always been the three major shortcomings in building a sponge city.
Ningbo's urban rivers, lakes, ponds and other water system sponges are inherent, but under the current situation of hardened roads everywhere, how can new sponges such as gardens, green spaces, and permeable pavements be created?
According to the plan, Ningbo will comprehensively promote sponges in new urban areas, various parks, and contiguous development zones, and set near-term, mid-term, and long-term phased goals based on actual conditions. In the near term by 2018, the effect of 'no waterlogging from light rain, no flooding from heavy rain, no black and odorous water bodies, and alleviation of heat island effect' should be achieved; in the mid-term by 2020, more than 25% of the city's built-up area is required to meet sponge city requirements; in the long term by 2030, this 'sponge' proportion will expand to 80%.
In April this year, Ningbo was selected as the second batch of national sponge city construction pilot cities, and the central government also provided a subsidy of 400 million yuan per year. The first batch of special subsidy funds has now been in place.
The Cicheng-Yaojiang area is the pilot area for Ningbo's sponge city construction. Within a total area of 30.95 square kilometers, 41 government-invested projects will start construction by the end of the year, and 31 have already started one after another. The future requirements for it are: flood control standards for a 100-year return period, and waterlogging prevention for a 50-year return period.
Underground Utility Tunnels: By 2020, the mileage will be no less than 50 kilometers, with a layout of 'one ring, seven areas, and multiple nodes'
'Underground utility tunnels' are public tunnels hidden beneath roads, used for the centralized laying of municipal pipelines such as electricity, communications, and water supply, to avoid repeated excavation of road surfaces when pipelines are repaired in the future.
It is reported that the task assigned to Ningbo by the Ministry of Housing and Urban-Rural Development this year is to start construction on 8 underground utility tunnel projects, located respectively at Yunfei Road, Guangyuan Road, and Shaodu Road in Yaojiang New City, Jiangbei; Haichuan Avenue, Hangzhou Bay Avenue, and Haibin Sixth Road in Hangzhou Bay New Area; Xipu Road in Fenghua; and the 220kv connection line from Chengliang Substation to Baojia Substation in Yinzhou District. Among them, the Haibin Sixth Road project has already started, and the remaining 7 projects will also be launched by the end of the year.
How to build the 'underground arteries'? It is reported that in new cities and new areas, underground and above-ground construction are required to proceed simultaneously; in old urban areas and key development plots, it can only rely on road reconstruction, rail construction, shantytown transformation, and organic urban renewal.
The construction goals of underground utility tunnels are divided into near-term and mid-to-long-term stages. The current focus is to synchronize the construction of utility tunnels with next year's new construction or reconstruction projects such as Century Avenue, Huancheng North Road, Daqing North Road, the western extension of Huancheng South Road, and Yinxian Avenue.
In the near term, by the end of 2020, through promoting the central urban area to gradually form an overall layout of 'one ring, seven areas, and multiple nodes', with the urban expressway as the 'one ring', and the northwest urban area, the north bank of Yongjiang River area (Zhuangqiao Airport area), the eastern new city, Yinzhou new urban area, the New Materials Science and Technology City (Guisi area), Beilun Binjiang New City, and Meishan Business District as key construction areas. By then, the completed underground utility tunnel mileage will be no less than 50 kilometers, and the mileage under construction will be no less than 50 kilometers, of which each county (city) will have completed underground utility tunnel mileage of no less than 5 kilometers and under construction no less than 5 kilometers.
In the long term by 2030, the cumulative completed underground utility tunnel mileage will be no less than 150 kilometers.
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