摘要
地形条件是影响区域人口分布和社会经济发展的主要因子之一。中国的县域地形起伏度呈西高东低、南高北低的空间格局,且以低值为主,50%以上的县域单元地形起伏度在1以下(绝对起伏不超过1 000m),较好地表达了我国地形呈三级阶梯分布的空间特征。2005年全国70%以上的人口居住在地形起伏度小于1的县域,经济发展向低起伏度地区明显集中,地形起伏度在1以下县域的GDP占2005年国内生产总值的85.41%,相对于人口分布,经济发展向低起伏度地区集中的趋势更加明显。
Based on the summarization of the condition and progress in the field of the relief degree of land surface (RDLS) research, for the necessity of natural environment evaluation of human settlements, by using the window-analysis method, this paper extracts the RDLS of China at county level and systematically analyzes the spatial distribution rules of RDLS at county level and its correlation between population density and economic density. The results show that: the RDLS of county in the west is higher than that of the east and the RDLS of the south is higher than that of the north, which reflects the Three Steps of Chinese Topography well in general. More than 50 percent counties in China the RDLS is lower than 1 (altitude is lower than 1000m), which shows that the majority of RDLS in China at county level is low. More than 70 percent people in China(2005) lived in counties where the RDLS is lower than 1 and the R2 value for the logarithmic correlation between RDLS and population density at county level is 0.69, which shows that the RDLS at county level is an important factor affecting the distribution of population within counties. While in counties where the RDLS is lower than 1 the GDP (2005) of which accounts for 85.41 percent of all and the R2 value for the exponential correlation between RDLS and economic density at county level is 0.74, which illustrates that the RDLS of county has a remarkable influence on county's economic development.
出处
《吉林大学社会科学学报》
CSSCI
北大核心
2011年第1期146-151,160,共6页
Jilin University Journal Social Sciences Edition
基金
国家人口发展战略研究项目(发规2008-1)
国家自然科学基金项目(40801223)
关键词
地形起伏度
人口分布
经济发展
县域
中国
relief degree of land surface
population distribution
economic development
county level
China
