岩溶山区地形因子对人口分布影响的定量分析

Quantitative Analysis of the Influence of Karst Mountainous Terrain on Population Distribution

为了揭示岩溶山区地形因子对人口分布的影响,选取了贵州省普安县为研究区,利用地理信息系统提取海拔、坡度、地形起伏度等地形因子,并分别与2010年人口数据图进行叠加分析。结果表明,海拔640～1640 m时,随着高程的增加,人口数量增加、人口密度增大;海拔1 640～2 100 m时,随着高程的增加,人口数量减少、人口密度降低,形成了独特的人口垂直分布现象;坡度因子影响下人口分布随着坡度的增加而减少,人口密度与坡度呈明显的负相关性;地形起伏度影响下人口分布随着地形起伏度的增加而减少,地形起伏度与人口分布也存在明显的负相关性。

In order to reveal the influence of karst mountainous terrain on population distribution, the Puan county in Guizhou province was selected for research area. The elevation, slope, topographic relief were extracted by using the geographic information system and overlaid the graph of population in 2010 respectively. The results showed that with the elevation between 640 to 1 640 meters, population and population density increase with elevation while with the elevation between 1 640 to 2 100 meters, population and population density reduce as the elevation increases. It forms a unique phenomenon of vertical distribution of population. Under the influence of slope factor, population distribution reduces as the slope increases, and population density and slope have a negative correlation. Under the influence of topographic relief factor the population distribution increases when the topographic relief decreases. Topographic relief and population distribution also have an obvious negative correlation.