Comprehensive Evaluation And Optimization Of Xuzhou Green Space System Based On Ecological Service Function

In recent years,with the rapid development of cities and the increasing population,urban residents have paid more and more attention to the advantages and disadvantages of the living environment.Urban green space is the basic guarantee for maintaining the balance of urban ecological environment,and has an irreplaceable role in improving the quality of urban ecological environment.At present,the evaluation of urban green space system in China still mainly stays on the basis of descriptive quantification of urban green space.The three green indicators commonly used in green land evaluation only focus on the quantity of green land and ignore the quality of green land.This method cannot really reflect Many aspects such as the structure and function of urban green space.The construction of the comprehensive evaluation index system is the basis for comprehensive scientific judgment of the urban green space system and plays a very important role.According to the evaluation results,it provides guidance for the optimal development of urban green space,so as to build a better urban ecological green space system in a targeted manner,so that the compound functions of the urban green space system can be fully exerted.From the perspective of ecological service function,this paper based on an in-depth analysis of the current status of the green space system in Xuzhou City,using analytic hierarchy process to select a total of 24 quantitative indicators from the aspects of greening quantitative,landscape structure,ecological benefits,social benefits,economic benefits,etc.,Built the green space system spatial structure and comprehensive benefit evaluation system,determined the weight of the evaluation index and conducted a comprehensive evaluation of the current status of the green space,summed up the existing problems of the green land system in Xuzhou according to the evaluation results,and proposed the optimization strategy of the green land system according to the problems,and strived to be Provide scientific basis for the planning and construction of urban green space system in Xuzhou.The first part is to analyze the related concepts of ecological service function,urban green space,urban green space system,etc.,through reading literature and collecting data,summarize the development history of ecological service function at home and abroad,green land system evaluation and Xuzhou green land system related The progress of the study provides a theoretical basis for the comprehensive evaluation of the green space system later.The second part first analyzes the basic situation of Xuzhou city.Through data collection and data collation,it sorts out the spatial evolution of the Xuzhou green space system,and analyzes the growth and changes of the Xuzhou green space system in recent years and the composition of various green areas.Summarize the advantages and existing problems of green space development in Xuzhou City,and then use remote sensing satellite images to identify green land,establish Xuzhou green space information spatial database,aiming atgreen spot density,green land fractal dimension,green land landscape heterogeneity index and reach ability.Based on the quantitative analysis results,according to the quantitative analysis results,from the two aspects of greening quantitative and landscape structure,10 evaluation factors are selected to establish a green space spatial structure evaluation system to evaluate the current status of the green land and summarize the current status of the green land in the spatial distribution and The problems in the internal structure provide a realistic basis for the comprehensive benefit evaluation of the green space system.In the third part,according to the current situation of the green space system in Xuzhou City,from the perspective of the comprehensive benefits of the urban green space system,the comprehensive ecological benefits,social benefits and economic benefits were selected from14 aspects to build the comprehensive benefit evaluation system of the Xuzhou green land system Then,through the comprehensive calculation,quantification,comparison and evaluation of each index factor,the evaluation results are analyzed to summarize the problems existing in the benefit function of the green land system in Xuzhou City.In the fourth part,starting from better exerting the environmental service function of the urban green space system to maximize the comprehensive benefits of the green space,firstly analyze and summarize the problems existing in the spatial structure and comprehensive benefit evaluation results of the urban green space system in Xuzhou City The existing problems are spatially corresponded to the current status of the green space system,dividing the urban area and the green land supply and demand zoning,and on this basis,the optimization goals are initially determined,and the green land landscape pattern is constructed.Then optimize the green space layout by types and put forward suggestions for overall optimization and improvement.While perfecting the planning of Xuzhou’s green space system,it provides demonstration cases and relevant strategic decision-making suggestions for the innovation of national ecological garden cities and ecological civilization construction.