CAJ | 학술논문

以兰州—西宁城市区域县级行政单元三普四普五普以及2009年人口数据为依托,运用探索性空间数据分析技术研究了兰州—西宁城市区域人口分布,发现该区域存在3个人口高密度中心。根据单中心密度函数与多中心密度函数拟合结果的比较,发现采用基于平方根负指数模型的多中心区域密度函数能够很好地阐述研究区域的人口集聚与扩散。研究发现,区域内存在两种人口集聚与扩散模式,兰州城区与西宁城区呈现出向心集聚的特征,而临夏市则为弱中心式扩散。
이란주—서저성시구역현급행정단원삼보사보오보이급2009년인구수거위의탁,운용탐색성공간수거분석기술연구료란주—서저성시구역인구분포,발현해구역존재3개인구고밀도중심。근거단중심밀도함수여다중심밀도함수의합결과적비교,발현채용기우평방근부지수모형적다중심구역밀도함수능구흔호지천술연구구역적인구집취여확산。연구발현,구역내존재량충인구집취여확산모식,란주성구여서저성구정현출향심집취적특정,이림하시칙위약중심식확산。
The distribution of population is of great importance to regional economic studies,which helps to reveal the characteristics and the development trends of regional spatial structure.This paper takes samples of thirty five counties in Lanzhou-Xining city region,which is the only one comparative integrated river basin units in the northern west part of China.Exploratory spatial data analysis was used to examine the population distribution characteristics of research units,and three high population density centers were found.To make sure which regional density function is more appropriate for Lanzhou-Xining area,firstly the gravity-based model is used to delineate the radiation scope of those three high population density centers and then the square-root negative exponential density function is found out to be the best one in explaining the population distribution of research units.Since the monocentric regional density have limits in polycentric regions,such as Lanzhou-Xining city region,the polycentric regional density based on the square-root negative exponential density function is used to examine the characteristic and the development trends of concentration and decentralization of population in this area.And we find there are two different models of concentration and decentralization of population in research units,namely,the concentration pattern,such as Lanzhou downtown area and Xining downtown area,and the dispersion pattern through weaken center such as Linxia City.