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Chinese Journal of Applied Ecology ›› 2003, Vol. ›› Issue (12): 2187-2190.

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Dynamic monitoring on land cover in loess hilly and gully area by the methods of RS and GIS

CHANG Qingrui1, LIU Jing1, YANG Qinke2, ZHANG Xiaoping 2   

  1. 1. Northwest Sci Tech University of Agricultural and Forestry, Yangling 712100, China;
    2. Institute of Soil and Water Conversation, Chinese Academy of Sciences, Yangling 712100, China
  • Received:2001-04-12 Revised:2002-01-14 Online:2003-12-15

Abstract: By the integration of RSand GIS,with the TM data obtained from Landsat 5 in1990 and the ETM plus data from Landsat 7 in 2000,and after geometrical rectifying and amplifying and man machine screen decoding data image,the map of eco environment and land use/cover in Yanhe watershed and its vicinities in 1990 and 2000 was obtained respectively,and the results of statistic analyses showed that in comparing with 1990,the artificial land in 2000 increased by 31%,the area of agricultural land was stable and that of orchard was 2.82 times more,and the area of artificial forest increased remarkably and that of shrub was 6 times more. The coverage rate increased to 13.88%,and the area of wilderness was 44.8% of that in1990.The quality of eco environment was improved remarkably in this area.

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