Spatial Distribution of Land Cover and Vegetation Activity along Topographic Gradient in an Arid River Valley, SW China

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2009 > Vol6 No.3

	Spatial Distribution of Land Cover and Vegetation Activity along Topographic Gradient in an Arid River Valley, SW China
	Liu Wen ; Xu Xianli ; Luo Jiancheng ; Shen Zhanfeng ; Zhong Qiuhai
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2009-09
卷号	6 期号:3 页码:274–285
关键词	Vertical distribution of land cover Anthropogenic activity Vegetation activity Environmental variability China
ISSN号	1672-6316
通讯作者	Xu, XL
英文摘要	Anthropogenic activities have become more and more important in characterizing the landscape, but their impacts are still restricted by natural environments. This paper discusses the interactions of anthropogenic activity, vegetation activity and topography through describing the spatial distribution of land cover and vegetation activity (represented by Normalized Difference Vegetation Index, NDVI) along topographic gradient in a mountainous area of southwestern China. Our results indicate that the existing landscape pattern is controlled by anthropogenic activities as well as topographic factors. Intensive anthropogenic activities mainly occur in areas with relatively low elevation, gentle and concave slopes, as these areas are easy and convenient to attain for human. Because of the destruction by human, some land cover types (mainly grassland and shrub) are only found in relatively harsher environments. This study also finds that topographic wetness index (M used in other places only reflects runoff generation capacity, but not indicate the real spatial pattern of soil water content in this area. The relationships between NDVI and W, and NDVI and length slope factor (LST)show that runoff and erosion have complex effects on vegetation activity. Greater values of W and LSF will lead to stronger capacity to produce runoff and transport sediment, and thereby increase soil water content and soil deposition, whereas beyond a certain threshold runoff and erosion are so strong that they would destruct vegetation growth. This study provides information needed to successfully restore native vegetation, improve land management, and promote sustainable development in mountainous areas, especially for developing regions.
语种	英语
公开日期	2013-08-14
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/6028]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2009_Vol6 No.3
推荐引用方式 GB/T 7714	Liu Wen,Xu Xianli,Luo Jiancheng,et al. Spatial Distribution of Land Cover and Vegetation Activity along Topographic Gradient in an Arid River Valley, SW China[J]. JOURNAL OF MOUNTAIN SCIENCE,2009,6(3):274–285.
APA	Liu Wen,Xu Xianli,Luo Jiancheng,Shen Zhanfeng,&Zhong Qiuhai.(2009).Spatial Distribution of Land Cover and Vegetation Activity along Topographic Gradient in an Arid River Valley, SW China.JOURNAL OF MOUNTAIN SCIENCE,6(3),274–285.
MLA	Liu Wen,et al."Spatial Distribution of Land Cover and Vegetation Activity along Topographic Gradient in an Arid River Valley, SW China".JOURNAL OF MOUNTAIN SCIENCE 6.3(2009):274–285.