JOURNAL OF NATURAL RESOURCES ›› 2006, Vol. 21 ›› Issue (1): 55-63,165.doi: 10.11849/zrzyxb.2006.01.007

• Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS • Previous Articles     Next Articles

Spatio-temporal Characteristics of Urbanization Area Growth in Nantong City,Jiangsu Province

CHU Jin-long1,2, MA Xiao-dong3, GAO Shu1, XU Jian-gang1   

  1. 1. Department of Urban and Resources Science,Nanjing University,Nanjing 210093,China;
    2. Department of Architecture,Anhui Institute of Architecture & Industry,Hefei 230022,China;
    3. College of Urban and Environmental Sciences,Xuzhou Normal University,Xuzhou 221009,China
  • Received:2005-05-30 Revised:2005-09-12 Online:2006-02-25 Published:2006-02-25

Abstract: The spatio-temporal characteristis of urbanization area are important indices to evaluate and/or show the regional social and economic development.Nantong,a medium sized city affiliated to Jiangsu province,is located in north of the Yangtze Delta with developed economy in China and alongside the Yangtze River,whose opposite is Shanghai.Based on the Landsat TM/ETM satellite images acquired in 1984,1991,1997,2000 and 2003,as well as information extracted on urbanization areas including urban area,town area and county seat area with the help of GIS,we analyzed in details the spatio-temporal characteristics including urban expansion process,morphologic change,structure differentiation of growth speed using some indices such as growth speed,growth intensity,fractal dimension,spatial autocorrelation index and so on.Additionally,the characteristic of spatial pattern was also analyzed on the basis of the above-mentioned iodices.The result shows:(1)the growth speeds of all kinds of urbanization area are accelerated,and the growth intensities enhanced gradually from 1984 to 2003;(2)in the 1980s,the growth of urbanization areas was dominated by central city expansion,but since the 1990s by county(city) seat and the administrative towns;(3)the fractal dimensions of urban land use inc-reased gradually,which indicates that the town growth is unsteady,attributed to the acceleration of regional urbanization process and limitations of natural conditions;(4)the types of urban land growth are mainly centralized on the middle and lower speed of expansion;and(5) the spatial au-tocorrelation characteristics of urbanization area growth speed and intensity are not evident.But some individual type presents the cluster distribution tendency to some degree.For example,the high value regions of urbanization area growth speed are distributed along the Yangtze River and along some main communication lines.Whereas the high value regions of expansion intensities are distributed around the central city.

Key words: urbanization area growth, spatial analysis, spatial autocorrelation, the Yangtze Delta, Nantong