Research On The Construction Of Green Infrastructure Network In Beizhen

Since the reform and opening up,China's rapid urban expansion has led to the neglect of the ability of natural services,and a large number of artificial systems have been built.At the same time,due to the strong drive of short-term economic interests and relatively low economic benefits in natural areas,urban natural space is constantly occupied by construction space,and the value of urban ecosystem and its ability to resist natural disasters are greatly reduced,so the urban elastic development is faced with a dilemma.With the acceleration of urbanization,a variety of environmental problems such as ecological pollution and flood disaster keep emerging.The uncontrolled and disorderly expansion of urban land and the deterioration of environmental quality are huge challenges facing urban development.Intensive development has increased the pressure of ecological environment in cities,and the pursuit of green natural environment and quality life of urban residents has become increasingly strong.As one of the ways to control smart growth and smart conservation,urban green infrastructure aims to build a natural support system for the city through the protection of natural space resources and the full respect for social,economic,cultural and other elements.The formation and stability of system can provide basic for future urban development ecological security pattern and the development of the control framework,finally realizes the reasonable protection of land resources and the effective control of urban spread,provide the foundation for the future of the city sustainable development,to guide the sustainable development of urban space,solve the problem of urban ecological environment is of great significance.Beizhen city is located at the eastern foot of medical and medical mountain with abundant natural resources.However,in recent years,with the rapid development of the city,the disorderly extension of urban construction land leads to the problems of the reduction of forest coverage rate,the atrophy of ecological space,the damage of landscape structure,the weakening of ecological function and the reduction of connectivity in Beizhen city.In this context,it is of great significance for the improvement of Beizhen's urban ecological space environment to explore the construction model and technical methods of green infrastructure suitable for Beizhen and explore the potential ecological resources of Beizhen.Based on Bei Town area as the research scope,this paper first in classifying green infrastructure construction at home and abroad excellent case analysis,on the basis of analyzing the Bei Town the basic features of ecological space sets the status quo of the city,and study Bei Town city facing ecological threat facing the fast urbanization,is quite necessary for the construction of green infrastructure.On this basis,the basic principles and objectives of Beizhen's green infrastructure construction are proposed:namely,based on the principle of paying equal attention to protection and restoration,the potential space resources of the city are excavated to build a networked and multi-level ecological space.Under the guidance of this goal,based on the GIS platform and data data,the ecological sensitivity analysis of Beizhen city is carried out,which serves as the basis for the selection of components of green infrastructure.By identifying important ecological patches and using the minimum cost model to build the connecting corridor,the green infrastructure network is constructed.Finally,combined with the status quo of Beizhen's ecological space planning and the results of green infrastructure construction,this paper puts forward the idea of Beizhen's green infrastructure construction from two aspects of implementation strategy and security system,with a view to implementing Beizhen's green infrastructure network.