干旱区生态环境知识资源中心(Arid): 近20年来黄河流域植被覆盖变化分析

Arid

	近20年来黄河流域植被覆盖变化分析
其他题名	The Vegetation Cover over Last 20 Years in Yellow River Basin
	杨胜天 1; 刘昌明 2; 孙睿 1
来源期刊	地理学报
ISSN	0375-5444
出版年	2002
卷号	57 期号:6 页码:679-684
中文摘要	利用1982-1999年AVHRR-NDVI数据和对应年份黄河流域气象观测数据，通过计算、分析春季、夏汛及伏秋黄河流域NDVI距平值和湿润指数距平值的年际变化，得出了20世纪80年代至90年代初黄河流域气候相对湿润，90年代中后期相对干旱，植被覆盖状况总体一直处于上升趋势的结论，并评估了黄河流域近20年来生态保护和建设工作成效。
英文摘要	Vegetation cover is a major feature for ecological system. The change of vegetation cover in large area is mainly caused by climate and human activities. The Yellow River, the second largest river in China with a basin of 752,443 km~2, includes semi-arid and arid environment. Therefore, it is necessary to study the change of vegetation cover in the Yellow River Basin, which will help us understand climate influences and impacts of human activities. In order to understand the change of vegetation cover in the Yellow River Basin and its influencing factors, we use the data of AVHRR-NDVI and the information of 76 meteorological stations in the Yellow River Basin covering 1982-1999 to analyze their spatial distribution and dynamic change in spring, summer and autumn. On the basis of calculating the NDVI mean deviation and Moisture Index (MI) mean deviation, we study the feature of MI mean deviation, the speed of NDVI mean deviation and the correlation between them. Finally, some conclusions are drawn. Firstly, the climate was relatively humid from 1982 to 1992 and relatively dry since 1993. The environment in the Yellow River Basin tended to be desiccated, but the vegetation cover is increasing. Secondly, the correlation between NDVI mean deviation and MI mean deviation demonstrates that the humid climate was helpful for vegetation cover. Thirdly, the average speed of vegetation cover increase was 0.58%. The speed of vegetation cover increase in the loess region and catchment area is 0-3.8%, which shows the achievement of ecological measurements in China. The vegetation cover in desert and riverhead region is decreasing, the speed of which is 0-3.0%, a reflection of the climate change.
中文关键词	黄河流域 ; 植被覆盖 ; 湿润指数 ; 遥感
英文关键词	the yellow River vegetation cover Moisture Index remote sensing
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:1006268
来源机构	中国科学院地理科学与资源研究所 ; 北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/203082
作者单位	1.北京师范大学环境科学研究所, 北京 100875, 中国; 2.中国科学院地理科学与资源研究所, 北京 100101, 中国
推荐引用方式 GB/T 7714	杨胜天,刘昌明,孙睿. 近20年来黄河流域植被覆盖变化分析[J]. 中国科学院地理科学与资源研究所, 北京师范大学,2002,57(6):679-684.
APA	杨胜天,刘昌明,&孙睿.(2002).近20年来黄河流域植被覆盖变化分析.地理学报,57(6),679-684.
MLA	杨胜天,et al."近20年来黄河流域植被覆盖变化分析".地理学报 57.6(2002):679-684.