Construction Green Infrastructure Compound Network In Fu Zhou

Along with the development of urbanization,the issue of human settlement has been increasingly prominent,the ecological environment is particularly remarkable.In recent years,with the method of the green infrastructure network,relevant scholars at home and abroad have been exploring the solutions to urban ecological environment problems from the perspective of improving green land health to promote its functional services.In the method of the green infrastructure network,network nodes need high quality green land,however,China’s high-density urban areas have the characteristics of less green land and low service capacity,as a result,it is difficult for the network to enter the the main urban areas that requires high demand for ecological services.As the the content of green infrastructure has been extending to the level of human landscape,the network can be introduced into the main urban area by connecting the cultural landscape that is distributed in the high-density city area,which greatly promotes the green space health and service capacity of city area.However,there are significant differences in the connotation and characteristics between ecological and cultural landscape.It is of great significance for the improvement of the health and service capacity of high-density urban green space in China on how to integrate the cultural landscape into the planning and construction of green infrastructure,and build a green infrastructure network with compound functions on the basis of their own features.For this reason,starting from the theories of landscape architecture and landscape ecology and other disciplines,this study discusses the basic composition,functional service,connotation and construction goal of Green Infrastructure Compound Network based on literature review,and proposes the concept of Green Infrastructure Compound Network,and according to the above,MSPA,minimum cumulative resistance model,connectivity analysis,nuclear density analysis and other methods are adopted to build a green infrastructure compound network of ecological landscape and cultural landscape that matches Fuzhou City,and evaluates the aspects of function and structure of built green infrastructure compound network in Fuzhou by means of random walk model and central quantification.Hopefully,the study could provide theoretical reference and guidance for the construction of urban green infrastructure compound network.The principle research conclusions are as follows:(1)The green infrastructure compound network can comprehensively promote the health and service capacity of urban green space,which is an effective idea and method to solve the current urban ecological problems.The key to advance the promotion of city green space health and ecological service capacity is that: the ecological flow of large patches in the suburbs is introduced into the green infrastructure compound network through the ecological green infrastructure network,as well as into the high-density urban area through the cultural green infrastructure.(2)The connotation and goal of green infrastructure compound network are determined,whose connotation is that the green infrastructure compound network is composed of ecological and cultural green infrastructure network,with the connotations of improving green space health and functional services,promoting resource protection and providing cultural education,natural education,leisure and recreation and so on,whose main purpose is that in the context of current intensive use of urban land,the better ecological flow in the region is introduced into high-density urban areas to improve the health and services of urban green space.Furthermore,it not only has the traditional green infrastructure network ecological function,but also has the heritage corridor,green way and other cultural protection,leisure and recreation functional goals.(3)The ecological green infrastructure network of Fuzhou City is constructed by means of morphological spatial pattern,connectivity analysis,minimum cumulative resistance model and gravity model.It turns out that the ecology green infrastructure network consists of 14 network nodes and 22 ecological corridors in Fuzhou,the specific distributions are: the four ecological sources are Lianhua Mountain,Gushan Mountain,Qishan Mountain and Wuhu Mountain,distributed in two sides of south and north,the 10 ecological nodes are distributed around the high-density urban areas,such as Wufeng Mountain,Gaogai Mountain and Liyu Zhou and other regions;most of the 22 corridors are around 4 ecological sources and inside Cangshan District.As the whole,ecological green infrastructure realizes the link of ecological source areas on both sides of the north and south,but the ecological flow of ecological sources can hardly enter into the high-density urban areas in deed.(4)Utilizing the nuclear density analysis and minimum cumulative resistance model,the cultural green infrastructure network of Fuzhou City is established,this network introduces the ecological flow in the green infrastructure compound network into the high-density urban area,which is also an important manifestation of the cultural connotation of the compound network,and of an important value in the protection of ecological and cultural landscape,leisure and recreation,natural education and cultural education in Fuzhou.(6)The consequence indicates that the cultural green infrastructure network in Fuzhou consists of 15 cultural landscape nodes and 22 corridors,the concrete distribution is: the network node takes Gulou District and Taijiang District as the core,forming two horizontal and vertical cultural axes,which are respectively the vertical axis of the landscape with Xindian Ancient City Relics-Sanfang Qixiang-Shangxiahang-Luzhou Ancient Town as the node,and the horizontal axis of the landscape with Meifengshan-Sanfang qixiang-South park-Luoxingta Park as the node,which connects the significant cultural landscape settlements of high-density urban areas,of important significance to expedite the landscape protection,leisure and entertainment and the highlight of the city card,in addition,the landscape pattern of humanistic environment has also been optimized.(5)This study systematically probes the landscape analysis theory of green infrastructure compound network construction,proposes the way of green infrastructure compound network construction,and offers the theory and method for Fuzhou green infrastructure compound network construction.Proceeding from the main functions of the green infrastructure complex network,this study analyzes the impact of landscape pattern on the green infrastructure compound network,puts forward the DPSIR framework of the green infrastructure compound network,and offers an analysis theory for the construction of the green infrastructure compound network.Methodologically,a spatial planning guidance model of green infrastructure compound network is presented from the fields of ecological landscape and cultural landscape elements,spatial distribution and functional services;From the point of view of ecological function and cultural function of green infrastructure compound network,the functional synergistic effect matrix is proposed.Landscape analysis theory,spatial planning guidance model and functional synergistic matrix provide theoretical as well as methodological guidance for the construction of green infrastructure composite network.(6)Taking advantage of the approaches such as spatial planning guidance model and functional synergy matrix,the green infrastructure compound network in Fuzhou City is built through the flows of node composition,complex landscape corridor construction and corridor integration.Results indicate that the green infrastructure compound network in Fuzhou is composed of 28 nodes and 54 corridors.There are54 corridors in three types,including 19 ecological corridors,12 cultural landscape corridors and 24 composite landscape corridors.(7)With the theory of landscape ecology,the theory of system complexity,and the theory of graphs,the internal mechanism between the component,spatial structure and functions of the green infrastructure compound network is analyzed,and the connotation of the green infrastructure compound network evaluation is presented as network structure and function.The free walk model and other methods are first used to quantitatively assess the function realization and network structure rationality of green infrastructure compound network in Fuzhou.The evaluation results indicate that the simulation of ecological flow distribution before and after the construction of the green infrastructure compound network in Fuzhou is carried out by the free walk model,which indicates that the function of the model is achieved preferably;Through the connectivity index,the price of ecological and cultural green infrastructure is higher than the index of ecological and cultural green infrastructure network structure,which manifests that the compound network has the best integral connectivity,whose network system has higher function and efficiency,and the cost ratio is 0.87 is the lowest,which indicates that it has the characteristics of low economic cost and high functional efficiency.The quantitative assessment of the compound network node shows that the node degree of Gaogaishan node is 1,the intermediate degree is 1,and the circuit center degree is 0.7,which is the highest comprehensive index of the center degree in the network,next,the various centers of Gushan scenic spot have a higher index,which indicates that these two nodes are the most key nodes in the green infrastructure compound network structure,which play an important supporting function on the whole network.