PROGRESS IN GEOGRAPHY ›› 2009, Vol. 28 ›› Issue (1): 85-92.doi: 10.11820/dlkxjz.2009.01.012

• Original Articles • Previous Articles     Next Articles

The Effect of Karst Mountain Physiognomy on Spatial Process of Urbanization in Guiyang City

LI Weihai1, LI Yangbing1,2, ZHOU Yan3, Dan Wenli1   

  1. 1. School of Geographic and Environment Sciences, Guizhou Normal University, Guiyang 550001, China;
    2. College of Geography Science, Chongqing Normal University, Chongqing 400047, China;
    3. College of Life Sciences, Guizhou University, Guiyang 550025, China
  • Received:2008-07-01 Revised:2008-12-01 Online:2009-01-24 Published:2009-01-24

Abstract:

Taking Guiyang as an example, a thorough analysis was carried out to reveal the relations of the karst mountain physiognomy and the spatial-temporal distribution characteristic of the spatial process of urban expansion in Guiyang, based on the MSS image of Guiyang in 1976, Landsat images in 1986, 1996 and CBERS image in 2006, as well as geomorphologic characteristics, 1∶50,000 DEM. Some analytical indexes such as relief degree of land surface, concentration index of land expansion, urban spatial radial shape index, etc. were introduced to describe the spatial differentiation of urban land expansion. The results show that the karst mountain physiognomy has serious restrictions to urban expansion of Guiyang. Concentration index of land expansion shows that the topographic distribution has direct impact on the expansion of distribution of landscape of the city in different directions. The expansion of construction land was mainly generated in flat terrain of the area where relief degree of land surface was less than 30 m. Comparsion of all the expansion patches of Guiyang city indicated that the density of new patches was higher than the density of extended patches. The geometric centers of urban area in Guiyang city has been transforming from northwest to southeast. First, the expansion of the city mainly generated along the gentle slope around the basin, and then the expansion generated along the karst mountain pass, valley land and small intermountain flat out of the basin; the expansion of the city was dispersed in flat area; and the maximum expansion intensity of the city was in 5~15km buffer in various partitions.

Key words: Guiyang, physiognomy, the karst mountain physiognomy, urban expansion