The GIS spatial statistical tool was used to analyze the population data of 21 WorldPops in the arable land dam area of more than 5 000 mu in Guizhou Province from 2000 to 2020,and the spatial and temporal pattern and change characteristics of population distribution in the arable land dam area of more than 5 000 mu in Guizhou Province in the past 21 years were quantitatively revealed.The results showed that the population of arable land dam area in Guizhou Province showed a trend of increasing first and then decreas-ing.According to the characteristics of the population growth curve,it could be divided into four stages:stable growth period(2000-2006),rapid fluctuation growth period(2006-2010),rapid negative growth period(2010-2015)and slow decline period(2015-2020),with an overall decrease of 9 900 people,of which 5 000 mu of arable land dam area increased by 9 400 people and 10 000 mu of arable land dam area decreased by 19 300 people;the population distribution of arable land dam area of more than 5 000 mu was mainly relatively lower-density agglomeration area and lower-density agglomeration area,and the population distribution difference was obvious;the spatial correlation of population density was generally manifested as no significant difference,and locally manifested as HH,LL and HL agglomerations;the migration range of the population center of gravity in the dam area was small,and the meridio-nal and zonal changes showed a reciprocating trend.
关键词
耕地坝区/人口分布/时空演变/空间自相关/贵州省
Key words
arable land dam area/population distribution/spatial-temporal evolution/spatial autocorrelation/Guizhou Province
维普
万方数据