Research On The Evolution And Mechanism Of Recreational Spatial Pattern In The Suburbs Of Big Cities

With the advent of leisure time,people's awareness of leisure is increasing and the demand for recreation among urban residents is also growing.The push and pull of supply and demand continue to play a role in the growth of recreational space on the outskirts of metropolitan cities.There is an urgent need for interpreting the evolution and formation mechanism from a theoretical and practical perspective.Based on the theory of system,the theory of tourism spatial structure and the theory of recreation zone around the city,this paper chooses the big city of Nanjing as the research object.By using the average urban center distance method,turning radius and spatial distribution curve,spatial discrete index,nuclear density estimation method,Spatial syntax,reachability analysis,dynamic attitude of single land use,land use transfer matrix and principal component analysis and multivariate linear regression model test and other spatial analysis and mathematical statistics methods to explore the spatial and temporal evolution of recreation area in Nanjing suburbs spatial and temporal evolution Characteristics,analyzes the influencing factors and dynamic mechanism of its spatial pattern,and puts forward the future development direction and countermeasures for the recreation area in Nanjing suburbs.Taking the suburban recreation space as an object,this dissertation focuses on the study of evolution characteristics of suburban recreation space from the point-line-area system,analyzes the factors influencing the formation of suburban recreation space under the background of big city development.Following the main line of the study of "spatial pattern analysis-factor extraction-evolution mechanism discovery-optimization strategy",this paper explores the evolution of the recreational space in Nanjing suburbs and its mechanism.The thesis can be divided into three parts:The first part(the first chapter and the second chapter)is the theoretical basis of the dissertation,and then introduces the background of the selected topic,research objectives and research significance,research ideas and research content,research methods and Technical route,at the same time sort out the relevant research progress at home and abroad,gives the relevant theory of the thesis research.The second part(the third chapter to the sixth chapter)is the empirical research part of this thesis,which is also the core content of the dissertation.Firstly,the scope of the research is defined and the data processing process and related research methods are introduced.Secondly,from three different perspectives of point,line and surface,this paper analyzed the spatial pattern of recreation areas in suburbs of Nanjing,and to explore the changing characteristics of the temporal and spatial patterns of recreation areas in suburbs,revealing the inherent evolution of the recreation areas.Thirdly,this paper quantitatively analysed each factor to clarify the interaction between the factors and the way of internal interaction to reveal the evolution of the internal mechanism;Finally,from optimizing the recreational resources allocation to integrate spatial agglomeration development,strengthening the construction of beautiful countryside to promote the recreation space development,constructing the greenway network to create ecological recreation space and speeding up the upgrading of recreational products to improve the quality of rural recreation,this paper put forward the future development direction and countermeasures for suburb recreation space.The third part(the seventh chapter)is the conclusion and the prospect part,expounds the main research conclusions,innovations,the insufficiency and the prospect of this article.Taking Nanjing as a case study,integrated data mining technology,GIS spatial analysis,mathematical statistics and mathematical modeling,this paper studies the spatial evolution characteristics and its inherent evolution mechanism of the recreation area point-line-surface system in metropolitan suburbs,Proposed optimization of suburban recreation space pattern,the results are as follows:(1)between 1995 and 2015,the number of recreational nodes on the outskirts of Nanjing increased significantly.The development of recreational and recreational resources greatly increased the recreation space in Jiangning District around the main city of Nanjing.The spatial distribution of recreation spots in Nanjing suburbs tends to be enhanced by gravitational constraints of the city center.The overall spatial distribution is characterized by the scattered distribution of nearby cities.Among them,the natural landscapes are resource-dominated scattered near cities,historic sites,artificial recreation and recreational holidays The class nodes show the spatial distribution characteristics of far-urban decentralized,near-urban decentralized and far urban centralized,respectively.The number of recreation nodes in the suburbs of Nanjing showed a decreasing trend with the increase of distance.During the period,the number of recreation nodes rose markedly.The distribution density of recreation nodes was the highest within 20km.The distribution density of various recreation nodes varied greatly with the distance.The evolvement process of suburban recreation space is characterized by the spatial evolution of "point-axis-surface" expansion,"large gathering and large dispersion",and the evolutionary characteristics of various recreation spaces are different.(2)The overall connectivity of the suburbs in Nanjing has been continuously improved and the overall level of integration has been greatly improved.However,the overall regional integration capacity is not high and the level of local integration is at a medium level.The expressway is the main axis of the integrated core.Nanjing suburbs have poorer spatial intelligence,less or no correlation between spatial conformity and integration,and it is very difficult for tourists to judge the overall space accessibility through the perception of local accessibility.There is a significant difference in the spatial coupling between the various recreational nodes and the traffic network.The overall reachability of Nanjing suburban recreation nodes is continuously optimized,and the proportion of reachable nodes within 0.5 hours is continuously increasing.The reachability of natural landscape recreation nodes is increasing year by year.The overall accessibility is better than the south of the Yangtze River to the south of the Yangtze River.The accessibility and reachability of the historic tourism attractions are not obvious within 0.5 hours.Artificial recreation Recreational nodes are significant changes,recreational holiday recreational nodes from scratch,reachability from weak to strong.(3)There is a certain continuity and regularity in the space,quantity and time-space transfer of recreation area in Nanjing.From 1995 to 2015,the tourist land for suburbs increased significantly.The suburbs were characterized by street-centered core-periphery proliferation.Suburban areas expanded around major tourist attractions.In the first 10 years,land use was more dynamic and significantly smaller in the next 10 years,with little difference between the increasement of tourism land use in the past 10 years.Woodland has the largest area of tourist land,followed by urban and rural industrial and mining land and cultivated land.(4)The formation and evolution path of recreation space in Nanjing suburbs have obvious characteristics,and the factors that affect the formation of spatial pattern are diverse.The number of A-class scenic spots,GDP,tourist arrivals,population density,discretionary income and share of tertiary industry promote the growth of recreation nodes.The urbanization will restrain the expansion of recreational points,GDP,urbanization rate,road network density.Discretionary income increases the accessibility of recreation routes,the number of tourist trips,the population density and tertiary industry negatively affect the accessibility of the recreation routes.There is no significant effect on the construction of A-grade scenic spots and the actual use of foreign investment.The number of A-level scenic spots,actual utilized foreign investment,population density and discretionary income to promote the development of recreation space,GDP,urbanization rate and road network density to restrain the development of recreation space.(5)The driving forces for the evolution of Nanjing's suburban recreation space landscape can be summarized into four aspects:attraction system,supportive force system,market power system and other systems.The attractive system is the internal driving force for the development of recreation areas in the suburbs.Support system is an important means to support the development of suburban tourism environment and recreation space.The market power system is the external driving force for the formation of recreation space.(6)The study suggests that Nanjing should enhance its tourism industry by "optimizing the recreational resources allocation to integrate spatial agglomeration development","strengthening the construction of beautiful countryside to promote the recreation space development","constructing the greenway network to create ecological recreation space"and "speeding up the upgrading of recreational products to improve the quality of rural recreation" four aspects of the optimization of suburban recreation space.