Study On Sponge Urban Planning Strategy In Coastal Zone Of Zhuanghe

With the acceleration of urbanization and the improvement of urban land use rate,the inconsistency between the construction of green land and water system and other construction land is increasing.Floods,water supply shortage,soil erosion and other problems occur frequently.Sponge city and other related flood management concepts emerge as the times require.In 2012,China formally introduced the concept of "sponge city","breaking through the"drainage" strategy of gray infrastructure,and using ecological means to analyze urban water problems from the perspective ofwater environment','water security','water resources','water ecology',etc.,trying to raise the issue from the aspects of source control,middle-end transport,end-point storage and so on.For solutions.The construction idea of traditional city is not contrary to the construction idea of sponge city.The construction of sponge city is to solve the problems caused by natural disasters on the basis of traditional city,and it is a kind of urban construction idea based on traditional planning.Zhuanghe River is the first batch of pilot cities of sponge cities.This paper discusses the characteristics of the coastal area of Zhuanghe River in the north coast and rainfall,planning urban flood control system,adapting to seasonal changes in the north,building a sponge city suitable for its development,and facing the low-lying terrain,water shortage and possible disasters caused by ocean storm surge in the coastal area.Find out the best strategy for building sponge city.Firstly,this paper analyzes the basic conditions of the natural situation in the coastal area of Zhuanghe City,analyzes the present situation of water resources,landforms and other natural conditions,the runoff coefficient of the land in Zhuanghe City,determines the management and control objectives of the sponge city construction in the coastal area of Zhuanghe City,and studies the internal regulation and storage cycle and external flood control and drainage.The overall strategy of sponge city construction in Binhai District of Zhuanghe.Secondly,in view of the present situation of Zhuanghe coastal area,a demonstration area is selected as a representative to study the construction of a concrete sponge city.With the SWMM computer model as the main research method,the relevant model is constructed,and the current situation of the demonstration area is discharged under the rainfall condition of one year,three years and twenty years.Quantitative analysis of the water situation,and then the original planning from the rainwater pipe network,surface water system,sponge facilities three aspects of the system to determine the drainage problems and location of the demonstration area.Finally,combined with the model simulation results,the demonstration area is optimized from the green infrastructure and grey infrastructure to solve the problems of regulation,storage and drainage in the demonstration area.At the same time,in view of the problems of ocean storm surge faced by the coastal area,when the drainage gate is closed,the demonstration area is optimized.The required storage space was quantified in detail.A sponge city planning scheme suitable for its development is constructed and checked by SWMM to determine the accuracy of the strategy.Starting from the two aspects of regulation,storage and drainage,combined with the joint effect of green and grey infrastructure,this paper studies the sponge city planning strategy suitable for the coastal area of Zhuanghe City by using the relevant technical means and quantifying the space optimization,so as to solve the water problems faced by the coastal area and maintain its due urban construction.Conditions,to build a more suitable for people's production and life of a safe sponge city.