As my country’s urbanization process continues to accelerate, the ecological problems faced by cities have become more and more prominent. The ecology is destroyed and ecological disasters occur frequently. In particular, there are serious water management problems, including floods, water shortages, and water pollution. These problems have seriously affected the economic and social development of the city. The externality of water is very strong, so it is necessary to integrate multiple aspects in the process of treatment. The construction of a sea city can not only improve the city's adaptability and adapt to changes in the environment, but also be able to withstand the natural disasters caused by rain, with a certain degree of flexibility, so it can also be called a "water elastic city."
In terms of the integrity of the system, the fragmentation of the ecosystem can be avoided, and the accumulation of rainfall runoff under the natural geography can be fully utilized. The Low Impact Development (LID) system is the focus of the construction of sponge cities. It is an important foundation for ensuring urban runoff pollution control and water ecological environment improvement, and improving water resource utilization efficiency. It is an important link in urban rainwater management and sponge city construction. The central town meeting pointed out that in the current stage of Miancheng, it is necessary to strengthen the importance of sea city construction, and carry out the pilot construction of sponge cities across the country. On the one hand, it solves the current problem of urban water seepage, and on the other hand, it gives full play to the environmental protection role through the construction of sea city , Effectively improve the existing environmental protection problems in the city, and promote the construction and development of the city.
The construction of sponge cities in my country started late, and the basic standard technical documents are relatively lacking. When the construction of sponge cities has risen to a national strategy and local technologies are urgently needed, there is an urgent need to formulate relevant technical cotton city standards. However, this technology is still in the preliminary exploration stage in my country, and the construction of low-impact rainwater development system is a cross-industry, cross-departmental, and cross-disciplinary undertaking, involving guiding planning, construction, water supply and drainage, structures, roads, gardens, landscapes, hydrology, etc. Many professions, lack of standards, have certain obstacles to their development. In this context, it is imperative to formulate complete standards involved in low-impact development practices.
Establish a complete water system, combining the shore and shore of the water body, to achieve the linkage effect of water environment governance and maintenance; thirdly, establish a complete pollution control facility system based on the water environment; finally, build a relatively complete governance system to achieve pollution sources Control and intercept, and promote endogenous governance. Drainage system is an important facility for urban sewage treatment and drainage. As an important part of urban public infrastructure, it is the focus of urban planning. The Sponge City concept is a concept that advocates the effective combination of drainage and recycling water. It can prevent floods by rationally deploying rainwater resources. It is an important design concept that needs to be followed in drainage design. Problems such as "waterlogging" frequently occur, giving the city Ecological development has brought adverse effects, and abundant rainwater resources cannot be used.
During the previous urban construction period, landscape paving was mainly located in urban public areas and residential areas, and construction materials with poor water permeability were mainly used, so that the rainwater permeability was greatly reduced. Investigate and analyze the situation of Xinjie Street, including the surrounding water environment and water ecosystem. Investigate whether there are pollution sources in the water quality of Xinjie Street and surrounding areas, and formulate corresponding schedules based on the investigation. Based on the high permeability advocated by the sponge city concept, the permeable pavement design method can make full use of water channels and ditches to gradually divert urban rainwater to stagnant water equipment in urban streets, and fundamentally solve the problem of urban rainwater infiltration. Test the existing drainage system, check the flow rate, and formulate corresponding improvement measures.
When designing urban drainage system and facility construction based on the concept of sponge city, the urban development plan and urban water demand must be effectively combined. Urban drainage design is a systematic and complicated project involving urban waterproofing and waterlogging prevention, environmental protection, and development planning. In many aspects, the design is more difficult. It needs to be forward-looking, considering that the designed drainage system can meet the development needs of the city for a period of time in the future.
By effectively coordinating urban drainage design and urban development and construction, the completeness, scientificity and rationality of urban drainage system design can be better enhanced.