China News Service, August 31. In response to the problem of urban waterlogging, Huang Yan, the deputy minister of the Ministry of Housing and Urban-Rural Development, stated on the 31st that during the "14th Five-Year Plan" period, we have set a goal and strive to basically form a relatively complete urban drainage by 2025. The waterlogging prevention engineering system ensures that it can effectively deal with the rainfall within the waterlogging prevention standards. Under the conditions of excessive rainfall, the functions of urban lifeline projects and important municipal infrastructures cannot be lost. By 2035, cities under the conditions of rainfall within the prevention and control standards must be eliminated. Waterlogging phenomenon.
On the afternoon of the 31st, the State Council Information Office held a press conference on efforts to achieve housing for all people.
At the meeting, a reporter asked: Recently, some cities have experienced serious waterlogging. What measures does the Ministry of Housing and Urban-Rural Development have to solve urban waterlogging?
Huang Yan responded that in April this year, the State Council issued the "Implementation Opinions on Strengthening Urban Waterlogging Control", which comprehensively deployed urban waterlogging control during the "14th Five-Year Plan" period.
Huang Yan pointed out that one of the most prominent features of urban waterlogging management is that it is a systematic work, which is reflected in three aspects:
First, the basin and regional flood planning system.
The safety of urban drainage is closely related to the flood discharge, flood discharge, and regional flood detention capacity of the large rivers and regional river systems surrounding the city, and the connection between flood control and drainage must be done.
In the event of heavy rains or even extreme weather, once a flood enters the city or the water level of the river rises, the urban rainwater cannot be discharged.
Large areas of stagnant water or waterlogging occurred in cities during flood seasons, which is often the case, and there is no overall flood and waterlogging system.
Second, the urban drainage and waterlogging prevention project system.
On the one hand, it is necessary to strengthen the vertical design of the city, because the water flows to the lower place, so it is necessary to reasonably determine the elevation of the plot and scientifically determine the drainage area.
On the other hand, it is necessary to build an urban drainage and waterlogging prevention engineering system that includes “source emission reduction, pipe network emission, simultaneous storage and drainage, and emergency response to excess”, including drainage pipe networks, pumping stations, drainage channels, and river and lake systems.
At present, there is still a big gap in the construction of this system, and there are many debts. To be realistic, it will take a long time to work.
Various localities have now generally formulated plans or systematic plans related to urban drainage and waterlogging prevention, and they are continuing to implement them.
Third, the emergency management system.
In response to excessive rainfall, it is necessary to implement regional “joint prevention and joint control” and “joint drainage and joint regulation” of floods, strengthen monitoring, early warning and early warning response, as well as information sharing, and coordinate the dispatch of urban water systems, drainage pipe networks, and large rivers and reservoirs outside the city. Improve the level of emergency management.
In the extreme weather in Zhengzhou that just happened some time ago, the rainfall was the largest in history.
To deal with this kind of weather, we must insist that people's lives are paramount, and promptly adopt emergency measures such as suspension of work and transportation, transfer and avoidance of danger.
These three systems must work at the same time to truly solve the urban waterlogging problem.
During the "14th Five-Year Plan" period, the Ministry of Housing and Urban-Rural Development will work with relevant departments to adhere to the people-centered approach, the harmonious coexistence of man and nature, the overall development and safety, and the implementation of the State Council’s "Implementation Opinions on Strengthening Urban Waterlogging Control" , Instruct local governments to solve urban waterlogging problems in a coordinated and systematic way, establish and improve a basin-regional flood-planning mechanism, and at the same time improve the level of emergency management.
Huang Yan said that during the "14th Five-Year Plan" period, we have set a goal to basically form a relatively complete urban drainage and waterlogging prevention engineering system by 2025 to ensure that it can effectively deal with rainfall within the waterlogging prevention standard and under conditions of excessive rainfall. The functions of urban lifeline projects and important municipal infrastructures must not be lost. By 2035, urban waterlogging under the conditions of rainfall within the prevention and control standards must be eliminated as a whole.
"Everyone is also concerned about the construction of sponge cities." Huang Yan said that sponge cities are the concept of urban rainwater management under the principle of green ecology. Some foreign countries call it "water resilient cities" and some call it "low-impact development rainwater systems." "To put it simply, it means that the city has more space to absorb, store, seep and purify water, which means that the hardened ground in this city cannot be too large.
In the event of extreme weather and rainfall, we still rely on drainage systems and emergency measures. In the past few years, we have a total of 30 sponge city pilots. The effects of the pilot areas are very good, and they can cope with the rainfall targets and effects within the waterlogging prevention standards.