西藏土地荒漠化遥感监测  

Monitoring of Land Desertification in Tibet Based on RS

作　　者：于海洋[1] 张振德[2] 张佩民[2] 余江宽[2] 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083 [2]中国国土资源航空物探遥感中心,北京100083

出　　处：《地球科学与环境学报》2007年第3期316-320,共5页Journal of Earth Sciences and Environment

基　　金：中国地质调查局项目(200315100002)

摘　　要：应用RS与GIS技术,利用1976年的MSS数据和2000年TM遥感数据,对西藏境内的荒漠化土地现状与动态变化进行监测研究,并对其时空演变特征进行了分析。结果表明,西藏荒漠化土地面积2000年为29.08×10^4km^2,占总面积的24.28%,其中沙质荒漠化土地面积为24.99×10^4km^2,占20.86%。1976年荒漠化总面积为27×10^4km^2。由1976-2000年间,荒漠化土地总面积增加了20 764.67 km^2,共增长7.69%,年增长率为0.32%。同时,土地荒漠化程度明显加重,重度沙质荒漠化土地面积增加了315.87%。Based on remote sensing and GIS technology, this paper monitored and analyzed the spatial temporal characteristics of the land desertification in Tibet by using MSS and TM data acquired in 1976 and 2000 respectively. According to the monitoring result, the land area of desertification in Tibet is 2. 908 × 10^5 km^2 , which occupies 24. 28% of Tibet whole land. The sandy desertification in Tibet is 2. 499 × 10^5 km^2, which occupies 20. 86% of Tibet whole land. The area of land desertification in 1976 is 2.7×10^5 km^2. The analytical result of remote sensing also shows that the gross land area of desertification in Tibet has increased 20 764. 67 km^2 , the increase rate of each year is 0.32%. Obviously, the degree of desertification becomes severer. The area of the severest sandy desertification and desert has increased 315.87 %.

关 键 词：西藏 土地荒漠化 遥感 地理信息系统 

分 类 号：P941.71[天文地球—自然地理学]