Resources Science ›› 2016, Vol. 38 ›› Issue (9): 1723-1732.doi: 10.18402/resci.2016.09.10

• Orginal Article • Previous Articles     Next Articles

Spatio-temporal differentiation of urbanization in the Xiangjiang Valley from 1990 to 2010

GONG Junxia1,2(), ZOU Bin1,2(), LIU Xingquan2   

  1. 1. Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring (Central South University),Ministry of Education,Changsha 410083,China
    2. School of Geosciences and Info-Physics Central South University,Changsha 410083,China
  • Received:2016-02-22 Revised:2016-06-20 Online:2016-09-25 Published:2016-09-22

Abstract:

Because of rapid urbanization,China is facing a series of problems related to the disconnection between urban population growth and land expansion,and increasingly empty cities. Accurately identifying the spatio-temporal regularity of population urbanization and land urbanization is significant for reasonable planning and regional urbanization construction in China. Here,we took the ecological protection area of the Xiangjiang Valley as our focal area. Data included total population and non-agricultural population at a country scale according to the China Statistical Yearbooks Database and 30 m spatial resolution land use data from the Geographical Information Monitoring Cloud Platform. We then used the deviation coefficient index and GIS spatial autocorrelation model to assess the coordination degree and spatio-temporal cluster characteristic of population urbanization and land urbanization at a county level from 1990 to 2010. Results demonstrated that both the level of population urbanization and land urbanization increased over the study period across the Xiangjiang Valley. The level of population urbanization showed generally low growth rates and the growth rate was obviously lower than land urbanization. Different from population urbanization of the single center mode,the progress of land urbanization of the Xiangjiang Valley clearly demonstrated multinuclear group development structure with centers at Chang-zhu-tan Urban Agglomerations,Loudi,Shaoyang and Hengyang city. The growth rate of population urbanization and land urbanization was imbalanced,and these imbalanced areas are mainly located around the ‘four axes and one nuclear’ of Xiangjiang Valley with significant spatial clustering. The nuclear is Changsha-zhuzhou-xiangtan urban agglomeration and the four axes are the Beijing-Hong Kong-Macao axis,Lou-Shao-Yong axis,Tan-Lou-Shao axis and Heng-Yong axis. The results will help optimize land development activities and provide scientific decision-making when protecting the ecological environment of the Xiangjiang Valley.

Key words: Xiangjiang Valley, urbanization, spatio-temporal evolution, spatial autocorrelation, deviation coefficient