基于Voronoi图、GIS的三峡库区农村居民点空间机理研究——以重庆市忠县为例

Rural Residential Distribution in Three Gorges Reservoir Area Base on the Map of Voronoi and the GIS——Taking Zhongxian Chongqing City as an Example

利用GIS分析技术、Voronoi图Cv值综合分析,探讨重庆市忠县农村居民点的空间机理,找出其分布的趋势性和规律性,为县、镇级土地规划和土地整治提供直观指导。根据聚落地理学的研究方法,建立Voronoi图、高程、坡度、坡向、道路、水系因子,通过空间分析法和定性定量分析法相结合的方法进行研究。结果表明忠县整体Cv值为85.52%,为集群分布,农村居民点在高程上主要分布在400~700 m;在7°—15°内分布最多,达到32.50%;在坡向影响下西北坡分布最多,达到14.95%;在道路因子下,农村居民点在50~100 m缓冲区内密度最高,达到64.38个/km^2;农村居民点主要靠近在距离水源100~200 m。

By the GIS analysis technology and comprehensive analysis of the Voronoi diagram Cv value, we explore the mechanism of rural residential distribution in Zhongxian, and find out the trend of the distribution regularity for land planning and land management at the county and township level, in order to provide intuitive guidance. According to the settlement geography research methods, we establish Voronoi diagram,elevation, gradient, slope direction, road and water system factor, and carried out spatial analysis method and qualitative- quantitative analysis method. Results show that the overall Cv value of Zhongxian is 85.52%, the cluster distribution of rural settlements are mainly distributed in elevation of 400-700 m, mostly distributed within 7°-15°, 32.50%; under the influence of slop, the northwest slope distribution is the most, 14.95%;under the influence of the road factor, the rural residential areas have the highest density in 50-100 m buffer area, 64.38 /km^2; rural residential areas are mainly 100-200 m away from water.