RESEARCH ON SUITABILITY SUBAREAS OF RURAL RESIDENTIAL DISTRIBUTION BASED ON MCR MODEL AND OPTIMIZATION MODEL——A CASE STUDY OF JINNIUHU STREET IN NANJING,LUHE DISTRICT

As an important component of the land used for urban and rural construction projects,rural residential area should be the material carrier to realize rural urbanization, modernization and industrialization,under the new socialist countryside construction.Currently,the systematic planning is lack in rural residential area of our country.The chaos land use structure and loose spatial distribution are seen universally in rural residential.While,the disordered patterns cause a lot of waste of land resources inner countryside and extremely unreasonable layout in the construction land.Therefore,the layout optimization in rural residential area is particularly important in this situation.The suitability subareas of rural residential distribution are the basis for optimizing the space layout,and also be the important way to improve production and living conditions in rural areas,keep the balance of arable land and coordinate rural and urban development.This paper took Jinniuhu Street as an example,and used GIS technology to analyze the distribution status of rural residential,while the MCR model was applied in rural residential suitability zoning.Accordingly,it could provide scientific guidance for the implementation of rural residential land consolidation project and the villages and towns planning.The result showed as follows.(1)The proportion of rural residential areas in Jinniuhu Street was as high as 11%.Meanwhile,there were some problems existed in the present situation,such as dispersive layout and fragmentary patches on the whole.And each administrative unit differed observably in the rural residential distribution,which could perform in the compactness in spatial layout and consolidation potential of rural residential land.From the space layout,characteristics that rural residential distributed along the areas with low slope,low altitude and convenient transpirations were showed remarkably.In detail,the number and area percentage of rural residential patch whose slope were blow 2°had reached 75%.Meanwhile,the area percentage of rural residential patch exceeded 60%,and more than 50% of the rural residential was in the range of 500 min the distance transport corridors.(2)The MCR model was applied successfully in this paper,and achieved good results.183 rural residential were selected as sources from 1295 individuals of all.According to the suitability degree of rural residential distribution,Jinniuhu Street could be divided into five suitability areas including highly suitable areas,suitable areas,general suitable areas,unsuitable areas and extremely unsuitable areas.Among them,the highly suitable areas accounted for 15.57% of the total area of the street,which was higher than the status area proportion.So the requirements of layout planning could be met in general.(3)According to the analysis of rural residential distribution status and results of suitability area zoning,the villages(communities) were divided into optimization model,including in-situ urbanization,internal rectification and gradual relocation and annexation.So then,optimal paths from macro level were proposed in this paper.