| The Urban green space system is an extremely important part of the Urban ecosystem,which plays a key role in improving the urban appearance.Nowadays,people are paying more and more attention to it.The research on Urban green space system is conducive to maximizing the ecological benefits of the green space system,and plays an important role in the planning of Urban green space system and improving the urban environmental quality.At present,the evaluation system of Urban green space system has not been unified,and the research on the ecological service function of Urban green space mostly focuses on the provincial and watershed scale,mainly focusing on the evaluation of ecological service function and value evaluation.The research on the comprehensive evaluation of ecological service function of Urban green space system rarely involves the cities in northern Anhui.Suzhou adheres to the "Two Mountains" theory to build a "Beautiful Suzhou" and actively promotes social green transformation in economic development.Therefore,conducting a comprehensive evaluation of Suzhou’s green space system has certain research significance.In this paper,Yongqiao District,the municipal district of Suzhou City,is taken as the research area.First,on the basis of the level of population demand,people’s demand for Urban green space is divided into three levels: survival demand,communication demand and development demand,and the functions of Urban green space are sorted out.Secondly,through the combination of ecosystem service function and Urban green space function,the classification of ecological service function of Urban green space is clarified.Using expert scoring method,AHP method,entropy method and comprehensive evaluation method,a comprehensive evaluation system of Urban green space system with three demands and six functions is formed.Finally,comprehensive calculation and evaluation of each index factor are conducted to analyze the existing problems of Urban green space system in Yongqiao District,and propose strategies for improving the green space system.The results indicate that:(1)By constructing the comprehensive information database of Urban green space system in Yongqiao District and interpreting the remote sensing image of Yongqiao District in 2020,the Urban green space system in Yongqiao District is divided into five types,with the largest area being park green space,accounting for 34.46%;Secondly,the number of affiliated green patches is the highest,accounting for 33.87% of the area;The proportion of protective green spaces is 25.56%;The number of regional green patches is the lowest,accounting for 3.14%;Square green space is the most lacking,accounting for only 2.98%.(2)Through the calculation of the established comprehensive evaluation system,the overall comprehensive evaluation value of Urban green space system in Yongqiao District is 0.637,and the construction level of green space system is above the middle.Among them,in terms of security service function,the comprehensive score is 0.893,leisure service function is 0.840,and cultural service function is 0.898,all of which belong to Class I and have a relatively high overall level;The support service function is 0.461,belonging to level III,and the overall level is relatively low;The adjustment service function is 0.387,and the landscape service function is 0.252,both of which belong to level IV and have a low overall level.Yongqiao District has played a good role in improving human settlements and mental health.The quality of life index of urban residents needs to be further improved.The dynamic carbon and oxygen balance function of green space is slightly low.The three-dimensional space is not green enough,and the green space has insufficient ability to retain dust in the air.(3)After a comprehensive evaluation of the Urban green space system in Yongqiao District,the corresponding improvement measures are proposed from five aspects: safety service function,adjustment and landscape service function,leisure service function,support service function,and cultural service function.Figure [15] Table [39] Parameter [106]... |
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