基于海拔高程的四川省少数民族自治州人口格局演化研究

Evolvement of population patterns in the ethnic autonomous prefectures of Sichuan province based on altitude

定量分析海拔高程与四川省少数民族自治州人口格局演化之间的关联性,可为引导人口合理流动、制定和落实区域人口政策提供科学依据。本次研究从人口分布、人口聚集程度、人口密度相对变化等方面系统分析了基于海拔高程的研究区人口格局演化状况,结果表明:(1)海拔高程是影响四川省少数民族自治州人口分布的主要因素,70.56%的人口聚集于海拔3000m以下区域;(2)随着海拔高程值降低,县域单元人口密集程度加剧,人口密集区和人口高度密集区集中分布于海拔较低的凉山州境内;(3)人口密度变化趋势越激烈的区域海拔高程相对越低,广阔的高海拔地区对人口流动产生限制作用,人口自然、稳定、缓慢增长成为高海拔区域人口变化的主要趋势。

Quantitative analysis of the correlation between altitude and the evolvement of population pattern can provide scientific basis for guiding the rational flow of population and formulating and implementing regional population policies in the ethnic autonomous prefectures of Sichuan province.The evolvement of population pattern based on altitude was analyzed from the aspects of population distribution,population agglomeration degree and population density change.The results showed that:(1)The altitude is the main factor affecting population distribution in the study area.70.56%of the population are concentrated in the regions below 3000 m above sea level.(2)As the average elevation decreases,the population density of county units increases;the densely populated areas are concentrated in Liangshan prefecture where the altitude is lower.(3)The more intense population density change corresponds to the lower elevation.The migration of population is limited by the high altitude region,and the population is in a state of natural,steady and slow growth in high altitude region.