长江源区沙漠化土地遥感调查及分析  

Desertification Land Survey in Source Region of Yangtze River and Analysis of Its Distribution Characteristics

作　　者：胡光印[1] 董治宝[1] 逯军峰[1] 宋翔[1] 魏振海[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所沙漠与沙漠化重点实验室,甘肃兰州730000

出　　处：《中国沙漠》2010年第3期505-509,共5页Journal of Desert Research

基　　金：国家自然基金重点项目(40638038)资助

摘　　要：利用2000年的ETM＋影像，在遥感（RS）和地理信息系统（GIS）技术的支持下，对长江源区的沙漠化现状进行了调查。调查结果显示，长江源区沙漠化土地面积为28982km^2，占整个源区面积的20．43％，其中，极重度沙漠化土地面积为4241．12km^2，重度沙漠化土地面积为3996．75km^2，中度沙漠化土地面积为12716．66km^2，轻度沙漠化土地面积为8027．16km^2，潜在沙漠化土地面积为92．46km^2。通过坡度分析发现，0°～2°的平地是长江源区的主要坡度类型，也是沙漠化土地主要的分布区域。This study based on the technology of remote sensing （RS） and geographic information system （GIS） surveyed the desertification land in source region of Yangtze River with the purpose of quantifying its distribution status. The result shows that the total area of desertification land is 28 982 km^2, accounting for 20. 43 % of the source region area of Yangtze River. In detail, the area of extremely severe desertification land, severe desertification land, moderate desertification land and light desertification land are 4 241.12 km^2, 3 996.75 km^2, 12 716.66 km^2 and 8 027.16 km^2respectively. In addition, it was found that the land with slope gradient between 0°-2° is the main land type in source region of Yangtze River, where is distributed with most of the desertification land of the study region.

关 键 词：长江源 沙漠化 遥感监测 青藏高原 

分 类 号：X87[环境科学与工程—环境工程]