干旱区生态环境知识资源中心(Arid): Assessment of desertification in Eritrea: land degradation based on Landsat images

Arid

	Assessment of desertification in Eritrea: land degradation based on Landsat images
	Ghebrezgabher Mihretab G; Yang Taibao; Yang Xuemei; Wang Congqiang
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2019
卷号	11 期号:3 页码:319-331
英文摘要	Remote sensing is an effective way in monitoring desertification dynamics in arid and semi-arid regions. In this study, we used a decision tree method based on NDVI (normalized difference vegetation index), SAVI (soil adjusted vegetation index), and vegetation cover proportion to quantify and analyze the desertification in Eritrea using Landsat data of the 1970s, 1980s and 2014. The results demonstrate that the NDVI value and the annual mean precipitation declined while the temperature increased over the past 40 a. Strongly desertified land increased from 4.8210~4 km~2 (38.5%) in the 1970s to 8.3810~4 km~2 (66.9%) in 2014: approximately 85% of the land of the country was under serious desertification, which significantly occurred in arid and semi-arid lowlands of the country (eastern, northern, and western lowlands) with relatively scarce precipitation and high temperature. The non-desertified area, mostly located in the sub-humid eastern escarpment, also declined from approximately 2.1% to 0.5%. The study concludes that the desertification is a cause of serious land degradation in Eritrea and may link to climate changes, such as low and unpredictable precipitation, and prolonged drought.
英文关键词	desertification Landsat images NDVI index SPI analysis Eritrea
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6533712
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336139
作者单位	Ghebrezgabher Mihretab G, Institute of Glaciology and Eco-Geography, College of Earth and Environmental Sciences, Lanzhou University;;College of Business and Social Sciences, ;;, Lanzhou;;Adi Keihi, ;;Eritrea 730000;;59.; Yang Taibao, Institute of Glaciology and Eco-Geography, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Gansu 730000, China.; Wang Congqiang, Institute of Glaciology and Eco-Geography, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Gansu 730000, China.; Yang Xuemei, Gansu Desert Control Research Institute, Lanzhou, Gansu 730070, China.
推荐引用方式 GB/T 7714	Ghebrezgabher Mihretab G,Yang Taibao,Yang Xuemei,et al. Assessment of desertification in Eritrea: land degradation based on Landsat images[J],2019,11(3):319-331.
APA	Ghebrezgabher Mihretab G,Yang Taibao,Yang Xuemei,&Wang Congqiang.(2019).Assessment of desertification in Eritrea: land degradation based on Landsat images.Journal of Arid Land,11(3),319-331.
MLA	Ghebrezgabher Mihretab G,et al."Assessment of desertification in Eritrea: land degradation based on Landsat images".Journal of Arid Land 11.3(2019):319-331.