Research On The Optimization Of Green Space System In Central In Central Urban Area Of Hengyang Based On The Matching Of Supply And Demand Of Ecosystem Services

With the rapid development of urbanization in my country,the scale of urban population continues to expand,which brings a series of ecological and environmental problems.At the same time,residents are paying more attention to the quality of the ecological environment,resulting in an increasing demand for ecological products.The urban green space system is an important part of the urban ecosystem and plays an important role in improving the ecological environment,optimizing the landscape pattern,improving the quality of life and promoting the health of residents.How to match the supply and demand of ecosystem services in urban green space systems has become a key issue to maintain residents’well-being and achieve sustainable development.This paper takes the central urban area of Hengyang as the research object,from the perspective of matching supply and demand of urban green space ecosystem services,selects water conservation,climate regulation,recreation and air purification services as the evaluation indicators of the supply and demand of urban green space ecosystem services,using the value equivalent Quantitative assessment of supply and demand of urban green space ecosystem services using methods,ecological model methods and socio-economic data.On this basis,based on the z-score quadrant method,the supply and demand matching of various services is analyzed.Finally,combined with the current characteristics of the green space system in the urban center of Hengyang,the ecological restoration area and the ecological remodeling area in the comprehensive supply and demand matching area are considered to be important to Hengyang city center.The urban green space system is optimized and suggestions are made.The conclusions are as follows:(1)Ecosystem services supply and demand.The total value of the supply and demand value of the central urban green space ecosystem in Hengyang City is 305.85×10~8 yuan,78.20×10~8yuan.In spatial distribution,the supply of ecosystem services and space heterogeneity is significant.Urban Green Space Ecosystem Services provides overall spatial layout in the center,while urban green space ecosystem services demand present the opposite spatial layout of ecosystem services,mainly subject to population density and social and economic development.(2)A mismatch between supply and demand of ecosystem services.There is a mismatch between the supply and demand of green space ecosystem services in the central urban area of Hengyang,and the spatial heterogeneity is obvious.According to the matching results of supply and demand of ecosystem services,it is divided into four types:high supply and high demand,high supply and low demand,low supply and high demand,and low supply and low demand.The degree of mismatch between supply and demand of various ecosystem services:climate regulation services>air purification services>leisure and entertainment services>water conservation services.From the perspective of spatial distribution,the mismatched areas are mainly distributed in central areas with high population density and relatively few urban green spaces.(3)By adjusting the type of land use to build urban park green space and protective green space,optimize the green space system in the central urban area of Hengyang.The characteristics of land use structure matching the supply and demand of each ecosystem service show that water conservation,recreation,forest land in air purification services,and waters in climate regulation services are the land use types that contribute the most.According to the comprehensive supply and demand matching results,it is divided into ecological restoration area,ecological remodeling area,ecological conservation area,and ecological coordination area.And analyzing the characteristics of land use structure of comprehensive supply and demand matching,it is found that there are land use types with weak supply in the ecological restoration area and the ecological remodeling area.Fully considering the impact of green space distribution on human well-being,add 4 comprehensive parks,54 community parks,102 amusement parks and 46 protective green spaces in the ecological restoration area,and add 13 recreational parks and 9 protective green spaces in the ecological restoration area.The green space system in the central urban area of Hengyang is optimized to meet the supply and demand matching of urban green space ecosystem services.