Research On The Ecological Spatial Structure Based On Landscape Ecological Service Process In Jinan

Urban haze pollution,urban heat island,urban rain island,water pollution and other urban diseases still exist in the city,this phenomenon makes the landscape ecological service of ecological space supply slightly insufficient.It is somewhat deficient to emphasize the protection of ecological elements and key constraints by relying solely on the protection planning of ecological functional areas,red lines delimit,and ecological protection and resources and environment bottom line thinking development control as the top-level design of ecological space planning.Under the condition of limited natural ecological landscape resource constraints,how to optimize the future urban ecological space,planning and control,to enhance the level of ecological space landscape ecological service performance,and to ensure the landscape ecological service effective supply.The goal and direction of ecological spatial structure optimization is to improve the actual benefit of service demand group or service demand area.In this paper,ecological spatial structure is cognized based on landscape ecological service process.This paper identifies and analyzes the essential characteristics and correlation characteristics of key components of the ecological spatial structure that support the process of landscape ecological services,and evaluates their performance from two level of the service providing area(SPA)associated with the service connecting area(SCA).Based on the results of performance evaluation and the extraction of limiting factors,the optimal path and spatial regulation mode of ecological spatial structure are discussed.On the one hand,it innovates the research paradigm of urban ecological spatial structure optimization,and on the other hand,it provides theoretical support and technical methods for the compilation of efficient service-oriented ecological spatial planning.The core research contents of this paper include:Firstly,The status quo is analyzed.Through analyzing and summarizing the natural background conditions of the current ecological space,the landscape ecological service demands and the main planning contents and technical means of the existing ecological space planning,the main problems existing in the current ecological space planning are comprehensively judged,including the spatial mismatch between supply and demand of landscape ecological services in the current ecological space planning,the unclear task of ecological space optimization and restoration,the lack of technical methods of ecological space optimization and restoration planning,and low effective supply level of landscape ecological services.Based on the process of landscape ecological service,the research on the identification and optimization of ecological spatial structure provides a new direction for solving the shortcomings of the above-mentioned ecological spatial planning.Secondly,The structure is identified.Based on the connotation of landscape ecological service process and ecological spatial structure,it can be seen that the analysis of landscape ecological service process involves service providing area and service connecting area,which correspond to different key components of ecological spatial structure respectively.With the help of Arcgis software platform,based on the identification basis,method and theory of ecological spatial structure,the representational model,binary suitability model,weighted suitability model and process model were used comprehensively.In view of the different service processes supported by the key components of the ecological spatial structure under different service types,appropriate methods are adopted to identify and extract the key components of the ecological spatial structure,so as to form the ecological spatial structure under different service types.On this basis,the basic characteristics of the key components of the ecological spatial structure were analyzed,and the correlation characteristics of the ecological spatial structure were analyzed based on the correlation classification system of the ecological spatial structure.Thirdly,Performance is evaluated.Through qualitative analysis,it is found that the location relationship of key components of ecological spatial structure determines the types of landscape ecological services to be carried by regional units and the availability of services in service demand areas.Then,service complexity index and service availability index are selected,and the Hellwig model is introduced to quantitatively analyze and verify the correlation between each component of the ecological spatial structure and service performance.Based on the correlation verification results between various components of ecological spatial structure and service performance,the evaluation dimension composed of service supply area and service connecting area is constructed.Based on the evaluation logic and benchmark of ecological spatial structure service performance,the indexes were selected from the two levels of natural attribute and pattern attribute to construct the evaluation index system of ecological spatial structure service performance.Finally,by combining the traditional TOPSIS method,grey correlation analysis method,vector projection method and quadratic weighting algorithm,the dynamic and static evaluation model of ecological spatial structure service performance was established to evaluate the performance of ecological spatial structure under different service types and comprehensive service types respectively,and the differences of the evaluation results were analyzed.Finally,The structure is optimized and regulated.Under he guidance of the theory of natural geographical differentiation,the theory of weak board and the theory of complex system co-evolution,this paper proposed to optimize the zoning of the key components of ecological spatial structure based on the service performance evaluation results of ecological spatial structure.An obstacle degree diagnosis model was built to quantitatively identify the main limiting factors of the service performance of each subregion.Starting with the limiting factors of the service performance,the degree of the obstacles of the limiting factors was ranked to determine the main optimization path and order of each subregion.On this basis,the corresponding specific and feasible spatial regulation mode is formulated according to the optimal path,and the research area is divided into five landscape belts according to the actual topographic and geomorphic features and ecological functional area planning results.And then,a spatial superposition is made with the optimized partition results above.According to the order of zoning optimization path,the corresponding spatial regulation mode combination and implementation objects of different optimized zoning in different landscape belts were determined.Finally,the guarantee measures for the implementation of spatial regulation mode were formulated.The research result of this paper innovates the optimization paradigm of urban ecological spatial structure theoretically,and proposes the partitioning optimization paradigm for key componets of ecological spatial structure based on the guidance of limiting factors,forming an optimization order that promotes the cooperative evolution of ecological spatial structure and orderly improvement of service performance.In practice,it provides planning technical support for the practical work of planning for improving service performance of urban ecological spatial structure with the goal of efficient and sustainable supply of landscape ecological services.