Landscape Pattern Analysis And Ecological Network Construction Of Urban Green Space In Qingdao

Urban green space is an important part of the urban ecosystem and the core of urban ecological environment construction.The scientific and reasonable spatial structure is the key to the full play of the urban green space ecological function.A comprehensive analysis of the urban green space landscape structure will help to grasp the overall spatial structure of the urban green space and build a targeted urban green space ecological network,can also give full play to the ecological service functions of urban green space.The article takes Qingdao as the research object,and interprets the remote sensing image of Qingdao in 2017 through RS and GIS technology,obtains the classification map of Qingdao urban green space,and establishes the corresponding urban green space landscape database.The landscape index is calculated by Fragstats software,and the urban green space landscape pattern of Qingdao is quantitatively analyzed and gradient analyzed.Based on this,the urban green space ecological network construction plan of Qingdao is proposed.Research indicates:1.Analysis of the overall landscape pattern of urban green space in QingdaoThe urban green space landscape area of Qingdao is 2010.98hm2,accounting for 17.82%of the total land area of Qingdao.It occupies a certain proportion in the urban ecosystem and can play a good ecological function.(1)At the level of plaque type: the regional green space is mainly composed of large plaques,and the degree of landscape fragmentation is high;the shape of the protective green space is complex,and it is strongly interfered by human activities,mainly composed of smalland medium sized plaques;The attached green space is dominated by small and medium plaques and the shape is relatively regular;the number of publick park is small and the degree of landscape fragmentation is low.(2)Landscape level: Qingdao urban green space type is relatively complete,but the degree of fragmentation is high,and the area occupied by various types of urban green space landscape is quite different,mainly based on large plaques,and the same type of plaque connectivity high.2.Gradient analysis of urban green space landscape pattern in QingdaoBased on the 2017 remote sensing image map of Qingdao and the Qingdao Urban Green space Information Database,the Qingdao Municipal Government is taken as the center,and the gradient pattern of Qingdao is divided into 5 km intervals to analyze the landscape pattern of Qingdao.Research indicates:(1)At the level of plaque type,the regional green space is mainly concentrated in the southeast,southwest and north of the city,and the plaque area is large,which is the dominant type;the gradient of protective green space is not obvious,mainly small plaques;The attached Green space are mainly concentrated in the south of the city,the degree of landscape fragmentation is high,the number of public park patches is small,and the degree of fragmentation is low.(2)At the landscape level,the density of plaques in the central part of the city is large,indicating that the landscape is fragmented,the distribution of urban green space is scattered,and the trend of landscape shape index is similar,indicating that the central part of the city is subject to strong human disturbance and landscape shape is complicated.The landscape in the north and south of the city is highly fragmented,the landscape shape is complex,and the degree of human disturbance is large,but the urban green space type is rich and the diversity ishigh.The aggregation index indicates that the southern part of the city has a high degree of plaque connectivity and a large plaque area.3.Construction of Qingdao Urban Green Space Ecological Network SystemBased on the analysis of urban green space landscape pattern in Qingdao,based on the theory of urban green space ecological network and the theory of landscape pattern optimization,in order to protect Qingdao’s “landscape of islands and forests”,we propose “one axis,three cores,mesh corridors and lots of nodes” program,which formed into an urban green space landscape pattern integrating the islands and bays of the landscape.