干旱区生态环境知识资源中心(Arid): Increased crop water requirements have exacerbated water stress in the arid transboundary rivers of Central Asia

Arid

DOI	10.1016/j.scitotenv.2020.136585
	Increased crop water requirements have exacerbated water stress in the arid transboundary rivers of Central Asia
	Ruan, Hongwei 1,2; Yu, Jingjie 1,2; Wang, Ping 1,2; Wang, Tianye 1,2
通讯作者	Yu, Jingjie
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	713
英文摘要	Water scarcity and ecological degradation as a result of the expansion of irrigated agriculture in arid regions have become global issues. A better understanding of the changes in crop water requirements (CWRs) is important for promoting sustainable development, particularly the water resource management of transboundary rivers. In this study, the latest and complete meteorological station and crop area data, the CropWat model, and the slope method were used to estimate the CWR in the Syr Darya Basin (SDB) of Central Asia from 2000 to 2018. The spatiotemporal variation of the water requirements for primary crops at the city scale was first assessed. The impacts of climate and cultivated land change on the CWR were quantified, and the associated impacts of the CWR on the water resources and environment were discussed. The results revealed that the mean unit area CWR of the SDB was 944.1 mm and the rate of increase was 7.6 mm/a from 2000 to 2018. The area of the primary crops expanded by 5851.6 km(2), and the total CWR increased at a mean rate of 2.0 x 10(8) m(3)/a, with the majority of this change being concentrated between 2010 and 2018. By 2018, the total CWR reached 194.8 x 10(8) m(3). The lower reaches of the SDB were associated with a high CWR and a high rate of increase. Along with the reduction in basin water resources, the increased CWR has exacerbated the water stress in the SDB. Sensitivity analysis indicated that the dominant factors influencing the change in the CWR are cultivated land change (65.0%) and climate change (35.0%). Owing to a reasonable crop planting structure, the middle reaches maintained a relatively low CWR and rate of increase. Given the predicted changes in climate, optimizing crop planting structure and controlling the expansion of cultivated land in order to reduce the CWR can help to mitigate water scarcity. (C) 2020 Published by Elsevier B.V.
英文关键词	Crop water requirement Arid transboundary rivers Climate and cultivated land change Syr Darya Basin Central Asia
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000514544700075
WOS关键词	CLIMATE-CHANGE ; RESOURCES MANAGEMENT ; AGRICULTURAL LAND ; FERGANA VALLEY ; IMPACTS ; REGION ; BASIN ; PRODUCTIVITY ; SIMULATION ; CHALLENGES
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315526
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ruan, Hongwei,Yu, Jingjie,Wang, Ping,et al. Increased crop water requirements have exacerbated water stress in the arid transboundary rivers of Central Asia[J]. 中国科学院地理科学与资源研究所,2020,713.
APA	Ruan, Hongwei,Yu, Jingjie,Wang, Ping,&Wang, Tianye.(2020).Increased crop water requirements have exacerbated water stress in the arid transboundary rivers of Central Asia.SCIENCE OF THE TOTAL ENVIRONMENT,713.
MLA	Ruan, Hongwei,et al."Increased crop water requirements have exacerbated water stress in the arid transboundary rivers of Central Asia".SCIENCE OF THE TOTAL ENVIRONMENT 713(2020).