干旱区生态环境知识资源中心(Arid): Improving the Scientific Understanding of the Paradox of Irrigation Efficiency: An Integrated Modeling Approach to Assessing Basin-Scale Irrigation Efficiency

Arid

DOI	10.1029/2020WR029397
	Improving the Scientific Understanding of the Paradox of Irrigation Efficiency: An Integrated Modeling Approach to Assessing Basin-Scale Irrigation Efficiency
	Xiong, Rui; Zheng, Yi; Han, Feng; Tian, Yong
通讯作者	Zheng, Y (corresponding author), Southern Univ Sci & Technol, State Environm Protect Key Lab Integrated Surface, Sch Environm Sci & Engn, Shenzhen, Peoples R China. ; Zheng, Y (corresponding author), Southern Univ Sci & Technol, Shenzhen Municipal Engn Lab Environm IoT Technol, Shenzhen, Guangdong, Peoples R China.
来源期刊	WATER RESOURCES RESEARCH
ISSN	0043-1397
EISSN	1944-7973
出版年	2021
卷号	57 期号:11
英文摘要	Irrigation is vital for the sustainability of water-limited agricultural areas. However, higher irrigation efficiency (IE) rarely reduces irrigation water consumption, a paradox well noted in the real world. Resolving this paradox requires rigorous assessment of basin-scale IE, which remains rare. This study holistically analyzed basin-scale IE using the Zhangye Basin (ZB), a typical agricultural area in arid northwestern China, as the testbed. A new basin-scale IE index was proposed that factors in irrigation return flow and groundwater's direct contributions to crop evapotranspiration. A novel approach was also developed to calculate this new index based on integrated ecohydrological modeling. The major study findings for the ZB include the following. First, return flow accounts for approximately 13% of irrigation water, which creates a difference of 0.1 between the new basin-scale IE index and a traditional field-scale index. Second, although basin-scale IE has notable interannual fluctuation, its multiyear average shows stability, which may be dependent on the basin's physical characteristics. Third, basin-scale IE reflects large spatial heterogeneity and is influenced by the intensity of surface water-groundwater interaction. Finally, under the projected future climate, return flow in the ZB will be enhanced by 3.2% per decade, and basin-scale IE shows an increasing trend. Overall, rigorous evaluation of basin-scale IE is critical to making heterogeneous policies and developing adaptive management strategies under the changing climate. The integrated modeling approach developed in this study provides a methodological foundation for overcoming misunderstandings about the IE paradox and benefits the reform of the current IE policy agenda.
英文关键词	irrigation efficiency ecohydrological modeling surface water-groundwater interaction endorheic river basin return flow HEIFLOW
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000723106900003
WOS关键词	WATER-USE EFFICIENCY ; HEIHE RIVER-BASIN ; CLIMATE-CHANGE ; SURFACE-WATER ; RESIDENCE TIME ; GROUNDWATER ; IMPACTS ; FUTURE ; AGRICULTURE ; SIMULATION
WOS类目	Environmental Sciences ; Limnology ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/373739
作者单位	[Xiong, Rui; Zheng, Yi; Han, Feng; Tian, Yong] Southern Univ Sci & Technol, State Environm Protect Key Lab Integrated Surface, Sch Environm Sci & Engn, Shenzhen, Peoples R China; [Xiong, Rui] Hon Kong Univ Sci & Technol, Dept Civil & Environm Engn, Hong Kong, Peoples R China; [Zheng, Yi; Han, Feng; Tian, Yong] Southern Univ Sci & Technol, Shenzhen Municipal Engn Lab Environm IoT Technol, Shenzhen, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Xiong, Rui,Zheng, Yi,Han, Feng,et al. Improving the Scientific Understanding of the Paradox of Irrigation Efficiency: An Integrated Modeling Approach to Assessing Basin-Scale Irrigation Efficiency[J],2021,57(11).
APA	Xiong, Rui,Zheng, Yi,Han, Feng,&Tian, Yong.(2021).Improving the Scientific Understanding of the Paradox of Irrigation Efficiency: An Integrated Modeling Approach to Assessing Basin-Scale Irrigation Efficiency.WATER RESOURCES RESEARCH,57(11).
MLA	Xiong, Rui,et al."Improving the Scientific Understanding of the Paradox of Irrigation Efficiency: An Integrated Modeling Approach to Assessing Basin-Scale Irrigation Efficiency".WATER RESOURCES RESEARCH 57.11(2021).