| Urban green space plays an important role in urban complex system and can accurately reflect the overall quality of people's living environment.In this study,the status data of green space in Yongding urban area were obtained through field investigation and literature review,and the basic indexes of national garden city were compared and analyzed.Delphi method and analytic hierarchy process were adopted to construct the satisfaction evaluation index system of park and square green space according to 4 criteria and 22 indicators.Satisfaction survey was conducted on the selected five research objects to obtain residents' satisfaction degree of park and square green space,reflecting the prominent problems in residents' use of green space.At the same time,I collected data on the main green Spaces in Yongding urban area of Zhangjiajie,sorted out and analyzed the data in my software book "Gis-based urban green space accessibility evaluation system",and generated the accessibility distribution map in Yongding urban area of Zhangjiajie by using the cost weighted distance method of Arc GIS tool.At the same time,it evaluates the accessibility of green space in Yongding urban area by calculating the cumulative resistance distance to the green space "source" layer,and finally puts forward relevant strategies for the optimization of green space system in Yongding city,so as to provide reference for the planning and construction of urban green space system.(1)The overall pattern of green space system in Yongding urban area of Zhangjiajie is good,but there is still a certain gap with the basic index of national garden city.The comprehensive scores of residents' satisfaction of parks and green Spaces in Yongding urban area are: Huilongguan Park is 3.4016;Culture square is 3.3884;People's square is 3.2616;Ziwu Park is 3.0463;Dayong Bridge Park is 2.8972.The evaluation index scores of different parks and plazas vary greatly,among which the water quality,toilet and trash can setting and barrier-free design index scores of Dayong Bridge Park are relatively low.Huilongguan Park has low scores in fitness equipment and amusement facilities.Ziwu Park scored low in water quality,fitness equipment,and the aesthetics of building facilities.The noise interference and health indicators evaluation of People's square are low;Cultural square,in the shade effect of plants,plants aesthetic evaluation is low.(2)According to the accessibility analysis based on GIS,the overall accessibility of Yongding urban area green space system is relatively good.The accessibility analysis based on GIS shows that the areas with better accessibility accounted for 62.44%,the areas with good accessibility accounted for 23.49%,the areas with poor accessibility accounted for 10.13%,and the areas with worse accessibility accounted for 3.95%.Some groups have poor accessibility,among which the Guanliping cluster and Qiezhugang have no public green space in blocks,which is far away from the riverside green space and greatly affected by the water area and the open space of the city.(3)The optimization strategy based on residents' satisfaction evaluation is to enrich landscape elements,enhance maintenance management,add service facilities and improve the degree of convenience.Gis-based accessibility research optimization strategy is to "increase the number of parks-road connectedness";Synthesized satisfaction survey analysis,accessibility analysis and urban green space system present situation in Yongding urban area of Zhangjiajie,it presents urban green space system in Yongding urban area of Zhangjiajie should pay attention to the core role of ecological matrix,strengthen the ecological corridor type dynamic link,to build international tourism city green space system optimization strategy,and the further optimization of green space system are discussed in this essay. |
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