Research On The Construction Of Ecological Security Pattern Based On MCR Model

The ecological environment is the material and spatial foundation on which human beings depend for survival,and provides support for human living space.The ecological environment has also made great contributions to global climate regulation.With the development of the regional economy,the urbanization process has accelerated.Human construction activities are becoming more frequent,and the expansion of construction land caused by urban development threatens to the ecological environment.Ecological land is being eroded continuously,and then there are serious environmental problems in the space where we live.Environmental problems such as water pollution,land pollution,and air pollution restrict the sustainable development of cities.Therefore,it analyzes and studies the relationship between urban development and urban environment changes,extracts relevant influencing factors,and comprehensively organizes and analyzes them.Finally,construct an ecological security pattern to ensure a coordinated relationship between the ecological environment and urban development.Eventually,scientifically optimized land use,and stable development of both economic and ecological environment protection will be achieved.This paper takes the Xin’an River Basin of Anhui province section as a research area,It is based on urban planning theory,ecological security theory,compound ecosystem theory and landscape ecology theory,and is built using the research method of the Minimal Cumulative Resistance(MCR).First,multi-factor analysis and superposition are used to identify the main ecological sources.The four indicators of POI density,night light density,road network density,and surface temperature in the artificial ecosystem factor layer are selected respectively.The five indicators of undulation,elevation,water system,surface roughness,and three indicators of normalized vegetation index,surface coverage,and habitat quality in the complex ecosystem factor layer.Afterwards,the weight of each factor is obtained by principal component analysis.After the factors are superimposed,the identification map of the main ecological sources is obtained.The next step is to select multiple factors to construct the resistance surface.This paper selects 8 factors including natural factors,artificial factors and compound factors,Then find the weight of each factor.Factors are superimposed to obtain the ecological resistance surface of Xin’an River Basin.Then this paper uses the method of least cost path to identify the ecological corridor,and uses the hydrological model to identify the ecological node.Finally,the identified ecological corridors and ecological nodes are used to construct the ecological security pattern.This paper analyzes the ecological security pattern and structure and other elements,so as to implement the corresponding ecological corridors and ecological nodes to specific spatial locations.Finally,this paper analyzes the optimization strategy of ecological security pattern.The main research conclusions of this article:(1)The Xin’an River Basin has an excellent ecological background but still faces the contradiction between urban construction and ecological protection;(2)The construction of ecological security pattern is the path to achieve the coordination of regional city construction and ecological protection;(3)The construction of ecological security pattern can realize the hierarchical management and protection of ecological land.