RESEARCH ON LAND-USE AND LAND-COVER IN THE SHIYANGHE RIVER VALLEY SUPPORTED BY RS-GIS-GPS TECHNOLOGY

The RS-GIS-GPS technology has been broadly applied in the studies on both global and local changes of land-use and land-cover.Supported by such technology, the data on land-use and land-cover of Shiyanghe River, West China,in 1994 and 2002 are analyzed to understand the spatial-temporal features of land-use/land-cover changes of land resources, the result shows that during the 7 years, the whole valley area has changed in wdtland, glacier, cultivated land,exposed land,grassland and salina.The areas wigh most variation in land-use types is in the east and north parts ofthe Shiyanghe River Valley.