STUDY OF SETTLEMENT SPATIAL EVOLUTION AND ITS SPACE RELATIONSHIP WITH ARABLE LAND IN CHANG-ZHU-TAN REGION
CHEN Yong-lin1,2, XIE Bing-geng1, LI Xiao-qing1, DENG Chu-xiong1
1. School of Resources and Environment, Hunan Normal University, Changsha 410081, China;
2. School of Geography and Planning, Gannan Normal University, Ganzhou 341000, China
Abstract Land use map in Chang-Zhu-Tan region was obtained from remote images in 2000, 2005 and 2010. Spatial evolution characteristics of settlements in Chang-Zhu-Tan and their impact factors were analyzed from the perspectives of landscape index, horizontal space and the vertical space, with the support of Arc GIS10.0 & Fragstats4.0 software. Methods involved were landscape index method and spatial analysis.The spatial relationship between the settlement and arable land was also investigated from three aspects such as space combination, space shift and space distance. The results showed that: the area, number and distribution density of the settlements in Chang-Zhu-Tan region, which were mainly located in the area below 200 m,was enlarging faster than before. The distribution density of urban settlements is small and their shape are in good orders,while the distribution density of the rural is higher but with disorderly structures.The natural trend of settlement spatial evolution is to lowland plains, whose social factors are population changes. We also put forward a concept in the paper, area ratio index (K) of land to settlements. According to the K value, the spatial combination of the arable land and settlements can be classified into three kinds: areas with a shortage of arable land resource, areas with co-ordination of supply and demand in arable land resource and areas with surplus in arable land resource. The space-transfer relationship between settlements and arable land could be divided into two types: areas without changes and areas with dynamic changes. The changes from arable land into settlements were obviously observed in regions around Changsha city. The faster the urbanization is, the farther the distance between the critical point and settlements is.
2015, Vol. 30 
