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Did water-saving irrigation protect water resources over the past 40 years? A global analysis based on water accounting framework

文献类型：期刊论文

作者Zhou, Xinyao2; Zhang, Yongqiang1; Sheng, Zhuping3; Manevski, Kiril4,5; Andersen, Mathias N.4; Han, Shumin2; Li, Huilong2; Yang, Yonghui2,6
刊名AGRICULTURAL WATER MANAGEMENT
出版日期2021-04-30
卷号249页码:14
关键词Paradox of irrigation efficiency Water accounting framework Water savings estimation Satellite-based ET partitions
ISSN号0378-3774
DOI10.1016/j.agwat.2021.106793
通讯作者Zhou, Xinyao(zhouxy@sjziam.ac.cn) ; Yang, Yonghui(yonghui.yang@sjziam.ac.cn)
英文摘要Water-saving technologies have long been seen as an effective method to reduce irrigation water use and alleviate regional water shortage. However, growing reports of more severe water shortage and increasing application of water-saving technologies across the world have necessitated reassessment of agricultural water-saving. This study develops a simple method based on satellite-based ET partitions to estimate water withdrawal, water consumption and return flow from the 1980s to 2010s, and quantifies water-savings across globe and four hot spot irrigated areas at both field and regional scales based on water accounting framework. The results show that global irrigation water flows keep increasing from the 1980s to 2010s, with over 50% increase from the expansion in irrigated lands. While water-saving technologies are found mainly applied in originally old irrigated lands, traditional flooding irrigation is still dominant in newly-developed irrigated lands. Non-beneficial water consumption (soil evaporation) is effectively reduced by water-saving technologies, but return flow has increased at the same time. At field scale, water-saving technologies fail to save water because the accumulated increased return flow is more than the accumulated decreased non-beneficial water consumption. At regional scale, however, water is saved because the return flow percolated to fresh aquifers is seen as beneficial rather than loss. At the same time, the accumulated increase of beneficial water consumption (crop transpiration) exceeds regional water savings, which explains the paradox between wide application of water-saving technologies and more severe regional water shortage. This study provides key new evidence for the paradox of irrigation efficiency and helps reconsidering water-saving technologies and their impacts on regional water resources.
资助项目Strategic Priority Research Program, Chinese Academy of Sciences[XDA2004030203] ; International Collaborative Project of the Ministry of Science and Technology of China[2018YFE0110100] ; open fund of Key Laboratory of Water Cycle and Related Land Surface Processes, Chinese Academy of Sciences ; Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences[WL2019004] ; Key Laboratory of Agricultural Water Resources, Chinese Academy of Sciences (Study on Global Changes in Agricultural Use/Supply and its impacts on Food Security) ; National Natural Science Foundation of China, China[41971262]
WOS研究方向Agriculture ; Water Resources
语种英语
WOS记录号WOS:000632322600002
出版者ELSEVIER
资助机构Strategic Priority Research Program, Chinese Academy of Sciences ; International Collaborative Project of the Ministry of Science and Technology of China ; open fund of Key Laboratory of Water Cycle and Related Land Surface Processes, Chinese Academy of Sciences ; Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences ; Key Laboratory of Agricultural Water Resources, Chinese Academy of Sciences (Study on Global Changes in Agricultural Use/Supply and its impacts on Food Security) ; National Natural Science Foundation of China, China
源URL[http://ir.igsnrr.ac.cn/handle/311030/161994]  
专题中国科学院地理科学与资源研究所
通讯作者Zhou, Xinyao; Yang, Yonghui
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.Chinese Acad Sci, Ctr Agr Resources Res, Inst Genet & Dev Biol, Key Lab Agr Water Resources,Hebei Lab Agr Water S, Shijiazhuang 050021, Hebei, Peoples R China
3.Texas A&M AgriLife Res Ctr, El Paso, TX 79927 USA
4.Aarhus Univ, Dept Agroecol, DK-8830 Tjele, Denmark
5.Sino Danish Ctr Educ & Res, Beijing 100190, Peoples R China
6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Zhou, Xinyao,Zhang, Yongqiang,Sheng, Zhuping,et al. Did water-saving irrigation protect water resources over the past 40 years? A global analysis based on water accounting framework[J]. AGRICULTURAL WATER MANAGEMENT,2021,249:14.
APA Zhou, Xinyao.,Zhang, Yongqiang.,Sheng, Zhuping.,Manevski, Kiril.,Andersen, Mathias N..,...&Yang, Yonghui.(2021).Did water-saving irrigation protect water resources over the past 40 years? A global analysis based on water accounting framework.AGRICULTURAL WATER MANAGEMENT,249,14.
MLA Zhou, Xinyao,et al."Did water-saving irrigation protect water resources over the past 40 years? A global analysis based on water accounting framework".AGRICULTURAL WATER MANAGEMENT 249(2021):14.

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来源：地理科学与资源研究所

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