Remote sensing monitoring of aeolian desertification and quantitative analysis of its driving force in the Yellow River Basin during 2000-2020

doi:10.7522/j.issn.1000-694X.2022.00152

Journal of Desert Research ›› 2023, Vol. 43 ›› Issue (3): 127-137.DOI: 10.7522/j.issn.1000-694X.2022.00152

Remote sensing monitoring of aeolian desertification and quantitative analysis of its driving force in the Yellow River Basin during 2000-2020

Hongyan Zhao¹^,²(), Changzhen Yan¹(), Sen Li¹, Yahui Wang¹^,²

^1.Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^2.University of Chinese Academy of Sciences，Beijing 100049，China

Received:2022-10-12 Revised:2022-11-28 Online:2023-05-20 Published:2023-05-31
Contact: Changzhen Yan

Abstract

Abstract:

China has achieved remarkable prevention and control effects of aeolian desertification in northern China， and has shown an overall reversal trend since 2000. The Yellow River Basin is an important barrier to national ecological security， and its aeolian desertification prevention and control is a key link in consolidating the foundation for high-quality development of the basin. Based on the background of the overall reversal of aeolian desertification in northern China since 2000. The aeolian desertification process in the Yellow River Basin from 2000 to 2020 was discussed in this study， and the dominant factor which driving the dynamics of aeolian desertification in the basin and their relative contributions were analyzed using the quantitative method. The results showed that：（1） The aeolian desertification land in the Yellow River Basin mainly consisted of moderate and severe aeolian desertification lands， and was concentrated in the middle and upper reaches of the Yellow River Basin. From 2000 to 2020， the total aeolian desertification land decreased by 7 529 km² （5.6%） in the Yellow River Basin. In detail， the serious aeolian desertification land continued to decrease by 47.1%， while the increasing trend of the slight， moderate， and severe aeolian desertification lands slowed down significantly after 2010. （2） In space， the aeolian desertification land was mainly distributed in the middle and upper reaches of the Yellow River Basin， and the total aeolian desertification land further shrank to the upper reaches of the Yellow River Basin from 2000 to 2020. The reversed aeolian desertification land with a large distribution area of 2020， 35 542 km²（26.5%）， and the developed aeolian desertification with a scattered distribution area of 2 823 km²（2.1%） was mainly concentrated in the Hobq Desert， Mu Us Sandy Land， and the source area of the Yellow River. The reversal or development of aeolian desertification was dominated by the transfer to the aeolian desertification land with a lighter or a higher desertification degree， and the transfer has also slowed down significantly after 2010. （3） The area jointly driven by climate change and human activities accounted for 89.67% of the aeolian desertification dynamic area of the Yellow River Basin from 2000 to 2020， and that driven by individual climate change or individual human activities only accounted for 7.30% and 3.03%， respectively. The relative contribution of human activities （54.91%） was generally higher than that of climate change （45.09%）， but this relative contribution of human activities decreased with the increase of the relative contribution of climate change in different periods. This work can provide a decision-making basis and reference for the key desertification control in the ecological protection and high-quality development strategy of the Yellow River Basin， and can also provide significant theoretical support for realizing the high-quality development of the Yellow River basin.

Key words: aeolian desertification, driving factor, multiple regression residual analysis, Yellow River Basin

CLC Number:

P931.3

Hongyan Zhao, Changzhen Yan, Sen Li, Yahui Wang. Remote sensing monitoring of aeolian desertification and quantitative analysis of its driving force in the Yellow River Basin during 2000-2020[J]. Journal of Desert Research, 2023, 43(3): 127-137.

Figures/Tables 10

Fig.1 Geographical location of the Yellow River Basin

Table 1 Classification criterion of aeolian desertification

沙漠化土地类型	流沙面积比例/%	植被覆盖度/%	景观特征
轻度沙漠化	<5	>60	只有零星的流沙斑点，大部分地区原生植被结构未被破坏
中度沙漠化	5~25	30~60	片状流沙、吹扬灌丛沙堆、风蚀区
重度沙漠化	25~50	10~30	流沙在区域内的分布面积较大，灌丛沙堆密集，吹扬强烈
极重度沙漠化	>50	<10	流动沙丘密集分布，仅有一年生沙生植物

Table 2 Identification criterion and contribution rate calculation method of the driving factors［28］

驱动因素类型	不同驱动因素类型划分标准			驱动因素相对贡献率
驱动因素类型	$s l o p e N D V I o b s$	$s l o p e N D V I c l i$	$s l o p e N D V I h a$	气候变化	人类活动
气候变化和人类活动共同驱动	>0	>0	>0	$s l o p e N D V I c l i s l o p e N D V I o b s × 100 %$	$s l o p e N D V I h a s l o p e N D V I o b s × 100 %$
气候变化和人类活动共同驱动	<0	<0	<0	$s l o p e N D V I c l i s l o p e N D V I o b s × 100 %$	$s l o p e N D V I h a s l o p e N D V I o b s × 100 %$
单独的气候变化驱动	>0	>0	<0	100%	0%
单独的气候变化驱动	<0	<0	>0	100%	0%
单独的人类活动驱动	>0	<0	>0	0%	100%
单独的人类活动驱动	<0	>0	<0	0%	100%

Table 2 Identification criterion and contribution rate calculation method of the driving factors［28］

驱动因素类型	不同驱动因素类型划分标准			驱动因素相对贡献率
驱动因素类型	$s l o p e N D V I o b s$	$s l o p e N D V I c l i$	$s l o p e N D V I h a$	气候变化	人类活动
气候变化和人类活动共同驱动	>0	>0	>0	$s l o p e N D V I c l i s l o p e N D V I o b s × 100 %$	$s l o p e N D V I h a s l o p e N D V I o b s × 100 %$
气候变化和人类活动共同驱动	<0	<0	<0	$s l o p e N D V I c l i s l o p e N D V I o b s × 100 %$	$s l o p e N D V I h a s l o p e N D V I o b s × 100 %$
单独的气候变化驱动	>0	>0	<0	100%	0%
单独的气候变化驱动	<0	<0	>0	100%	0%
单独的人类活动驱动	>0	<0	>0	0%	100%
单独的人类活动驱动	<0	>0	<0	0%	100%

Fig.2 Temporal change （A） and flow direction （B） of different aeolian desertification land types in the Yellow River Basin from 2000 to 2020

Fig.3 Dynamic change of different aeolian desertification land types in the Yellow River Basin from 2000 to 2020

Fig.4 Spatial pattern of different aeolian desertification land types in the Yellow River Basin from 2000 to 2020

Fig.5 Area proportion （A） and its change （B） of different driving factors in the Yellow River Basin from 2000 to 2020

Fig.6 Spatial distribution of different driving factors in aeolian desertification reversal area （A） and aeolian desertification development area （B） in the Yellow River Basin from 2000 to 2020

Fig.7 Relative contribution （A） and its change （B） of climate change and human activities in the Yellow River Basin from 2000 to 2020

Fig.8 Variation of annual mean temperature （A）， annual precipitation （B）， annual average potential evapotranspiration （C） and spring average wind speed （D） in the Yellow River Basin from 2000 to 2020

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Remote sensing monitoring of aeolian desertification and quantitative analysis of its driving force in the Yellow River Basin during 2000-2020

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