长江源区荒漠动态遥感监测及驱动力分析

摘要/Abstract

摘要： 利用遥感和GIS空间信息分析技术,以长江源地区的4期遥感数据为主要信息源,将荒漠分为高寒荒漠、裸岩石砾地、戈壁、沙地、裸土地、盐碱地,通过目视解译提取了长江源区4期荒漠信息,在此基础上进行荒漠动态变化及驱动力分析。结果表明,长江源区荒漠分布范围较广,荒漠面积占源区总面积的28%左右,荒漠中以高寒荒漠、裸岩石砾地、戈壁、沙地为主,其次是裸土地和盐碱地。近30 a来的变化趋势是20世纪70年代中期到1990年荒漠化发展较快,荒漠面积增加了43 935.00 hm2,1990年到2000年荒漠面积减少了32 821.28 hm2,2000年到2005年荒漠面积增加了29 611.30 hm2。

关键词: 长江源区, 荒漠, 遥感, 动态监测

Abstract: A RS database derived from Landsat MSS in middle 1970s, Landsat TM in 1990, Landsat ETM+ in 2000 and Landsat TM in 2005 was employed to analyze the desert sptio-temporal variation in source region of Yangtze River by GIS technique. The desert in study area was classified into six types: alpine desert, naked-rock desert, Gobi, sandy desert, bare land, and saline-alkaline land. Deserts cover the most area of source region of Yangtze River, occupying 28% of the total area. Alpine desert, naked-rock desert, Gobi, and sandy desert are dominant; bare land and saline-alkaline land are second. The evolution of desert developed positively from middle 1970s to 1990, with an increase by 43 935 hm2, adversely from 1990 to 2000 with a decrease by 32 821.28 hm2, again with an increase of 29 611.30 hm2 from 2000 to 2005.

Key words: desert, remote sensing, dynamic monitoring, source region of Yangtze River

中图分类号:

逯军峰;董治宝;胡光印;宋翔;魏振海. 长江源区荒漠动态遥感监测及驱动力分析[J]. 中国沙漠, 2010, 30(3): 510-515.

LU Jun-feng;DONG Zhi-bao;HU Guang-yin;SONG Xiang;WEI Zhen-hai. Desert Dynamics Monitoring by RS and Its Driving Factors in Source Region of Yangtze River[J]. JOURNAL OF DESERT RESEARCH, 2010, 30(3): 510-515.

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