Landscape change in middle Heihe River Basin

Abstract

Abstract: Using GIS, a landscape structure analysis program FRAGSTATS,this paper dealt with the landscape change in the middle Heihe River Basin during the past 20 years.During the past 20 years,the landscape elements had a complex change of landscape structure, an apparent transition of landscape composition, but the landscape in a whole still displayed a pattern of sharply contrast between oasis landscape, desertification landscape.Human activities significantly changed the distribution, allocation of the limited water resource in the basin, leading to an acute contradiction between desertification, oasisfication.Moreover,the transitional area between desertification, oasisfication was very sensitive to these processes. The decrease of Shannon's diversity index, evenness index manifested the intensive management, reconstruction of landscape by human beings,which improved the socioeconomic benefits of the region on one hand, but decreased the landscape heterogeneity, landscape diversity,leading to the decrease of eco environmental benefits of some areas in the basin on the other hand.The research method, technology used in this paper were also discussed.

Key words: Landscape change, Heihe River Basin, Landscape metrics, GIS, FRAGSTATS

CLC Number:

Q149

LU Ling, CHENG Guodong, LI Xin . Landscape change in middle Heihe River Basin[J]. Chinese Journal of Applied Ecology, 2001, (1): 68-74.

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