The Research On Spatial Integration Of Rural Settlements Under The Action Of Pole-Axis

The Promulgation of National plan on New Urbanization and implementation of Land Remediation planning have put forward higher requirements about co-ordinate urban and rural development,intensive land use and building new socialist countryside.Driven by history,natural conditions,living habits,lack of unified planning and other reasons,spatial layout of rural settlements is in a state of spontaneous choice for a long time,which caused the extensive land use and layout mess.Therefore,how to instruct the rural settlements to plan orderly,built intensively,and develop reasonably in the request of the new rural construction is the current rural land use problems to be solved.As the classical mode of regional spatial structure,Pole-axis theory will inject new vitality into Spatial Integration of Rural Settlements.The classification of village-town system reflects different growth poles of pole-axis theory;axis suitability evaluation reflected the impact of traffic,rivers,and other axis on the spatial distribution of rural settlements.Results under the action of pole-axis can provide certain scientific basis for spatial integration.Taking Jintan of Jiangsu Province as research area,with the support of GIS technology,spatial statistics theories and pole-axis theory,this dissertation analyzed distribution characteristic,classification of village-town system and its influence scope and axis suitability,then determined the types of rural settlement and gave recommendation for spatial integration.Here are the main contents this dissertation:(1)Analyzed distribution character on rural settlement.Taking rural settlements extracted from land use change data as data source,with the support of GIS spatial analysis and statistical method,this dissertation used the adjacent index method based on distance,kernel density estimation method based on density,landscape pattern index method to analyze the general characteristics,discrete characteristic,intensity and layout related factors,and disclosed problems of present situation land use.(2)Established village-town system level.Based on the spatial distribution of the villages and towns in Jintan,this dissertation used k-means spatial clustering method to divide different villages group,then formed village-town system according to the gravity value strength calculated by gravity model based on improved quality and the distance parameter inside different village group.Used statistical analysis tools to quantify the effect of development axis on settlements.(3)Proposed Integration solutions to rural settlements.Built a comprehensive influence index system of villages and towns and divided the scope of each village based on weighted Voronoi diagram,realizing regional reconstruction.Combined village levels,axis suitability calculated based on the roads and rivers,this dissertation identified different types of rural settlements and put forward integration scheme to realize scientific planning and reasonable layout.The results of the study showed that:(1)GIS technology,in conjunct with a variety of quantitative analysis methods based on point pattern could analyze spatial distribution of rural settlements comprehensively;(2)Integrated applications of gravity model and space clustering method could carry out rural settlements classification quickly and efficiently and spatial distribution tended to balance each grade;(3)The introduction of weighted Voronoi diagram to the scope division of the growth pole broke former boundaries delimited owing to the history and administrative reasons;(4)Considering the pole-axis,rural settlements was divided into four types in Jintan,which provided a reference to spatial integration of rural settlements.