Study On Spatial Pattern Optimization Of Urban Parks

Urban park can improve the urban ecological environment,beautify the urban landscape,provide leisure,fitness,science and education and other functions,occupy an important position in the urban space.Existing studies mainly discuss the layout of urban parks from the perspective of ecological construction,however,these methods do not consider the coupling between the overall urban pattern and park green space from the level of park accessibility and patch landscape connectivity.In this study,the central city of Hengyang city as an example,using 2021 park green space distribution vector data,traffic network data,aiming at the shortcomings of existing research,explore a new method of urban park spatial pattern optimization.Firstly,based on urban traffic network data and space syntax,a line segment model of central urban area was established to analyze the accessibility of each park patch.Secondly,the importance of patch landscape connection of each park is analyzed by using the analysis of morphological spatial pattern,and then the distribution characteristics and current situation of hengyang central city parks are comprehensively analyzed.Thirdly,the index system of influencing factors of urban park layout was constructed,questionnaire was designed,and structural equation model was established to analyze the main influencing factors of urban park spatial layout.Finally,according to the main influencing factors of urban park layout,from the promotion of urban park distribution balance,improve the park patch landscape connection Angle proposed hengyang downtown park layout optimization scheme,and selected one of the new park to do a detailed landscape design.The main results of the study are as follows:(1)From the perspective of spatial accessibility,the value of global integration and local integration of each park is obtained based on the spatial syntax model.It is found that the accessibility of parks on main traffic lines is relatively strong.As a whole,the distribution of parks is "axis + scatter".From the partition point of view,Zhengxiang district is "axis + scattered point" dense distribution,Shigu district and Yanfeng district park is "axis + scattered point" sporadic distribution,Zhuhui District park is scattered point sporadic distribution.(2)From the aspects of morphology spatial pattern of urban park plaques may connectivity index(d PC),it is concluded that hengyang city center park plaques and larger area along the strip connection degree is high,the patches of landscape as a whole,high degree of landscape connection important patches within the four partitions the number of relatively consistent,but uneven spatial distribution.The important patches in Zhengxiang district and Yanfeng District were distributed along the main axis of Zhengyang Road,and the important patch parks in Shigu District were distributed near water bodies and main roads.Zhuhui area of the main patch scattered distribution.(3)From the morphology of the spatial accessibility and spatial pattern of level analysis,park accessibility is influenced by the urban traffic,plaque importance influenced by park area,therefore in the case of classification,higher accessibility plaque important strong comprehensive city park,a total of six important park plaques showed higher accessibility,distribution is more balanced.However,the landscape connectivity of all the parks in the study area is low,and the parks with high accessibility are mainly distributed in Zhengxiang District,while the parks with low accessibility are mostly distributed in Shigu district,Yanfeng District and Zhuhui District.Finally,hengyang city city park layout problems:(1)large area of the park’s subjectivity,the main role and the main function is not clear.(2)The lack of public open parks in small area parks.(3)The connectivity between parks is weak.(3)Based on the network questionnaire,with social factors,economic factors,environmental factors and cultural factors as the main factors affecting primary index,index of each class divided three secondary indexes,to build index system of city park layout factors,structural equation model,it is concluded that the four factors that affect the positive fundamental of park layout.(4)Proposed hengyang downtown park green space "one axis-three belts-multi-center-scattered point" layout optimization scheme,the scheme to achieve the park accessibility,landscape connectivity of the overall improvement.This study can enrich the urban green space system planning theory,provide reference for hengyang city park green space layout optimization,but also can provide reference for other urban park construction.