干旱区生态环境知识资源中心(Arid): A long-term record (1995-2019) of the dynamics of land desertification in the middle reaches of Yarlung Zangbo River basin derived from Landsat data

Arid

DOI	10.1016/j.geosus.2021.01.002
	A long-term record (1995-2019) of the dynamics of land desertification in the middle reaches of Yarlung Zangbo River basin derived from Landsat data
	Zhan, Qiqi; Zhao, Wei; Yang, Mengjiao; Xiong, Donghong
通讯作者	Zhao, W (corresponding author), Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China. ; Zhao, W (corresponding author), Chinese Acad Sci Tribhuvan Univ, Kathmandu Ctr Res & Educ, Beijing 100101, Peoples R China.
来源期刊	GEOGRAPHY AND SUSTAINABILITY
ISSN	2096-7438
EISSN	2666-6839
出版年	2021
卷号	2 期号:1 页码:12-21
英文摘要	Widespread desertification in the middle part of the Yarlung Zangbo River (YZR) basin is threatening the sustainable development of this region. To capture this process, a method was proposed for large-scale desertification monitoring by using Landsat images from 1995 to 2019. The method used an integrated classification method combined with a hierarchical decision tree and nearest neighbor classifiers. The spatio-temporal dynamics of the desertification pattern were analyzed to assist in the detection of possible driving forces. Using validation samples collected from Google Earth high-resolution images and field investigations, the overall accuracy of the classification in 2019 was 92.3% with a Kappa coefficient of 0.84. The major results were: (1) total sandy land area in 2019 was 734.1 km(2), which accounted for 3.7% of the study area, prominently distributed along the wide river valleys and inlets of tributaries with a strip and discontinuous pattern. Sandy land tends to be distributed in the southern aspect regions with lower elevations and that are closer to rivers; (2) sandy land areas showed two temporal stages: a gradual increase of 102.4 km(2) from 1995 to 2015 and a large decrease of 106.8 km(2) from 2015 to 2019; (3) newly increased sandy land was distributed in the YZR Valley, while the revegetation on sandy land occurred mainly in the Lhasa River basin and some regions in the YZR Valley; and (4) increased sandy land area of 142.1 km(2) was mainly distributed in the southern band of the two rivers. Correspondingly, revegetation on sandy land was more effective on the northern banks of the river valleys. These findings provide guidance for implementing vegetation recovery on sandy lands and provide important insights for maintaining sustainable development.
英文关键词	Desertification Landsat Spatial-temporal dynamics Yarlung Zangbo River Basin Qingzang Plateau
类型	Article
语种	英语
开放获取类型	Other Gold
收录类别	ESCI
WOS记录号	WOS:000649256900002
WOS关键词	QUANTITATIVE ASSESSMENT ; SPATIAL-DISTRIBUTION ; FORMATION MECHANISM ; AEOLIAN SAND ; CLASSIFICATION ; CHINA ; GRASSLAND ; PLATEAU ; IMAGES ; TIBET
WOS类目	Green & Sustainable Science & Technology ; Geography, Physical
WOS研究方向	Science & Technology - Other Topics ; Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352819
作者单位	[Zhan, Qiqi; Zhao, Wei; Yang, Mengjiao; Xiong, Donghong] Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China; [Zhan, Qiqi; Yang, Mengjiao] Univ Chinese Acad Sci, Beijing 10049, Peoples R China; [Zhao, Wei; Xiong, Donghong] Chinese Acad Sci Tribhuvan Univ, Kathmandu Ctr Res & Educ, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Zhan, Qiqi,Zhao, Wei,Yang, Mengjiao,et al. A long-term record (1995-2019) of the dynamics of land desertification in the middle reaches of Yarlung Zangbo River basin derived from Landsat data[J],2021,2(1):12-21.
APA	Zhan, Qiqi,Zhao, Wei,Yang, Mengjiao,&Xiong, Donghong.(2021).A long-term record (1995-2019) of the dynamics of land desertification in the middle reaches of Yarlung Zangbo River basin derived from Landsat data.GEOGRAPHY AND SUSTAINABILITY,2(1),12-21.
MLA	Zhan, Qiqi,et al."A long-term record (1995-2019) of the dynamics of land desertification in the middle reaches of Yarlung Zangbo River basin derived from Landsat data".GEOGRAPHY AND SUSTAINABILITY 2.1(2021):12-21.