Analysis on landscape patterns change of land use along expressway

摘要

Taking the area along the Beijing section of Jingcheng expressway as study area, this paper calculates the area changes and conversions of landuse types based on the land use map of 1995,2004 and 2009. The result shows that: The agricultural structure changed obviously because of the expressway with dramatic influence on the land use. The fragmentation degree of land use along the expressway increases and the patch similarity shape becomes smaller from 1995 to 2009. The diversity index increases and the landscape components area ratio difference is gradually shrinking. The landscape patterns change of cultivated land, garden plot, forest, grassland and unused land shows a generally similar pattern; the landscape fragmentation and the diversity index increases, the shape becomes more and more irregular, and more and more dispersed in distribution. Construction land and traffic land have a different pattern, even the diversity index increases, but their shape becomes ruled, and the distribution becomes concentrated.