基于3S技术的西部石羊河流域土地利用/土地覆盖变化研究

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

在3S技术支持下,通过利用土地利用/土地覆盖信息分析参数对20世纪90年代中期和21世纪初两个时期石羊河流域土地利用变化进行的定量分析结果表明:7年间,土地利用类型发生变化比较大的地区是石羊河流域的东部和北部.整个流域湿地、冰川、耕地、裸露地、草地、盐碱地等都发生了变化.研究实践表明,利用3S技术进行国土资源调查,建立国土资源环境数据平台,每5～10年进行一次数据更新,可以很好地反映土地利用/土地覆盖的变化情况,从而为更好地研究土地利用、土地覆盖变化规律,为政府的宏观决策提供依据.

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.