Remote Sensing Monitoring on Dynamics of Desertified Lands in Yellow River Source Region in Last 30 Years

JOURNAL OF DESERT RESEARCH

2008, Vol. 28

Issue (3): 405-409 DOI:

沙漠与沙漠化

Remote Sensing Monitoring on Dynamics of Desertified Lands in Yellow River Source Region in Last 30 Years

QIE Yan-fei^1,2, YAN Chang-zhen¹, SONG Xiang^1,2, DUAN Han-chen^1,2

1.Cold and Arid Regions Environmental and Engineering Research Institute, Lanzhou 730000, China; 2.Graduate School of Chinese Academy of Sciences, Beijing 100049, China

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Abstract Desertified lands are the main land cover types in Yellow river source region. By method of remote sensing and GIS and based on the information source of remote sensing data in typical periods of the study region, the desertified lands in this area are classified into four types: sandy desert, Gobi desert, alkaline desert and preglacial desert. Using the database of desertified lands derived from Landsat MSS in the middle 1970s, Landsat TM in 1989s, Landsat ETM in 2000s and Landsat TM in 2005s, we discussed the dynamics of desertification. The results show that the desertified lands mainly distribute in the middle and western areas of the study region, mainly include preglacial desert and sandy desert. In the last 30 years, the desertified land area generally increased before 2000 and decreased since 2000, especially the change of sandy desert was obviously and it increased more rapidly in period from 1989s to 2000s than in other periods.

Key words: source region of Yellow River desertified land remote sensing dynamic monitoring

Received: 02 January 2008 Published: 20 May 2008

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	Articles by authors
	QIE Yan-fei
	YAN Chang-zhen
	SONG Xiang
	DUAN Han-chen

Cite this article:

QIE Yan-fei;YAN Chang-zhen;SONG Xiang;DUAN Han-chen;. Remote Sensing Monitoring on Dynamics of Desertified Lands in Yellow River Source Region in Last 30 Years. JOURNAL OF DESERT RESEARCH, 2008, 28(3): 405-409.

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http://www.desert.ac.cn/EN/ OR http://www.desert.ac.cn/EN/Y2008/V28/I3/405

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