E3S Web Conf.
Volume 308, 20212021 6th International Conference on Materials Science, Energy Technology and Environmental Engineering (MSETEE 2021)
|Number of page(s)||9|
|Section||Environmental Ecology and Biochemical Testing|
|Published online||27 September 2021|
The aeolian desertification process and driving mechanism of Qinghai Lake basin from 2004 to 2019
1 School of Geography, Geomatics and Planning, Jiangsu Normal University, Xuzhou, Jiangsu Province, 221116, China
2 School of Resource and Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei Province, 430070, China
3 School of Resource and Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei Province, 430070, China
We calculated the area of seven ecosystems, used the NDVI index to analyze the temporal-change of vegetation-covered land in the Qinghai Lake basin from 2004 to 2019, and the principal component analysis to analyze the driving mechanism of desertification. The results showed that grasslands are the dominant ecosystem, and the desert ecosystem had an area of 32 km2, accounting for only 0.1% of the total area. The evolution of desertification was in the reversal stage. The vegetation cover increased from 54% in 2004 to 66% in 2019, showing a change process of mild destruction-slow restoration: 2004-2008, high degree vegetation-covered land dominated the declination of vegetation with the dynamic trend of -5.67%; 2009-2013, medium degree vegetation-covered land dominated the restoration of vegetation with the dynamic trend of 2.45%; 2014-2019, medium and high degree vegetation-covered land showed an increasing trend with the dynamic trend of 0.86% and 1.17% respectively. Natural and human factors, which were manifested as the domination of human activities and the exacerbation effect of natural factors, influenced desertification. The first principal component integrated both anthropogenic and natural factors accounted for 52.27% of the contribution rate, while the second principal component included only natural factors that accounted for 23.77%.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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