黄河源头地区土地覆盖的时空变化特征

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Abstract

Based on the Landsat TM/ETM+ images and field survey data, the characteristics changes of land-cover pattern and spatial variation have been studied with the aids of 3S techniques in the source regions of the Yellow River since the mid-1980s. Then change trends of spatial pattern were analyzed in the study area. Influencing factors of ecological environment diversion in the source areas were discussed. The results indicated that patch density changes of land types were observed in the source regions of the Yellow River. The dominant grassland was destroyed to some extent in the recent 20 years. The climate in two source region has become warmer and drier in the recent 20 years due to the global warming; the regional land cover change of spatial structure is obvious. The alpine environment and trend of the climatic changes were the decisive factors affecting grassland ecosystem.

Key words： land cover temporal and spatial variation Yellow River headwaters region

Received: 25 February 2013

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	Articles by authors
	YANG Yi-peng
	GUO Luo
	HUANG Qi
	LI Dong-dong

Cite this article:

YANG Yi-peng,GUO Luo,HUANG Qi, et al. Temporal and spatial variation of land cover change in the source regions of the Yangtze and Yellow Rivers[J]. , 2013, 32(1): 98-103.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2013/V32/I1/98

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