Acta Geographica Sinica ›› 2010, Vol. 65 ›› Issue (4): 416-426.doi: 10.11821/xb201004004

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The County Accessibility Divisions in China and Its Correlation with Population Distribution

WANG Zhenbo1; XU Jiangang1; ZHU Chuangeng2; QI Yi1; XU Lu1   

  1. 1.School of Geographic and Oceanographic Sciences; Nanjing University; Nanjing 210093; China;
    2.College of Urban and Environmental Science; Xuzhou Normal University; Xuzhou 221116; Jiangsu; China
  • Received:2009-03-11 Revised:2009-12-11 Online:2010-04-25 Published:2010-04-25
  • Supported by:

    National Natural Science Foundation of China, No. 40871261; No.40671053; National Social Science Foundation of China, No.06BJL058; Jiangsu Province Postgraduate Cultivation Innovation Project Fund, No.CX08B_013Z

Abstract:

Based on matrix raster data covering the whole space,this paper calculates spatial accessibility of all counties (city,urban district) in China using cost weighted distance method and ArcGIS 9.2 as platforms.Then we discuss the relation of traffic accessibility and population aggregation under the background of China\'s rapid urbanization.This is not only a practical test of the western population theory in China,but also a discovery of the phenomenon of transportation guiding population aggregation in China.The result shows that:(1) The cost weighted distance method can realize accurate conversion of spatial accessibility from qualitative description to quantitative calculation.(2) County accessibility in China has mainly low values and a distribution structure of circle layer and reverse-to-natural gradient,where "Heihe-Tengchong" line is the demarcation line.(3) According to accessibility,Chinese mainland can be divided into 3 parts:High Value Region (HVR),Intermediate Value Region (IVR) and Low Value Region (LVR).The HVR is in eastern coastal area of China;IVR is situated on the periphery of HVR,which can be further divided into Southeast Provinces Subregion (SEPSR),Shaanxi-Gansu-Ningxia-Shanxi Subregion (SGNSSR) and Jilin Subregion (JLSR);LVR can be divided into Yunnan-Sichuan-Chongqing Subregion (YSCSR),Inner Mongolia-Heilongjiang Subregion (IMHSR),Xinjiang Subregion (XJSR) and Qinghai-Tibet Subregion (QTSR).(4) County accessibility is closely related with population density in China.The 2.5-hour circle is the limited distance for the effects of Chinese accessibility on population aggregation.As the accessibility of a region goes higher,the circle of population aggregation affected by accessibility becomes bigger.As the accessibility of a region goes higher,the circle of population aggregation affected by accessibility becomes bigger.Meanwhile,the correlation between accessibility and population becomes smaller.The result shows that the effect of transportation conditions on population aggregation in less developed areas is far larger than that in developed areas.It also indicates that the HVR,SGNSSR,JLSR,YSCSR,and XJSR should develop their transportation systems with equalization.The SEPSR and QTSR should focus on the inner-county transportation,and IMHSR should fully implement regional transportation system construction.

Key words: county, spatial accessibility, population aggregation, Raster Cost Weighted

CLC Number: 

  • C924.24