DOI: 10.1002/2016MS000885
Scopus记录号: 2-s2.0-85023159727
论文题名: Significant impacts of irrigation water sources and methods on modeling irrigation effects in the ACME Land Model
作者: Leng G ; , Leung L ; R ; , Huang M
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期: 3 起始页码: 1665
结束页码: 1683
语种: 英语
英文关键词: Efficiency
; Floods
; Groundwater
; Numerical methods
; Population statistics
; Pumps
; Recharging (underground waters)
; Runoff
; Soil moisture
; Sprinkler systems (irrigation)
; Subirrigation
; Surface waters
; Water
; Water supply
; ACME
; Groundwater pumping
; Irrigation methods
; Irrigation water use efficiency
; Numerical experiments
; Sprinkler irrigation
; Water table depths
; Water use efficiency
; Irrigation
; agricultural modeling
; census
; experimental study
; global change
; groundwater
; irrigation system
; pumping
; runoff
; soil moisture
; water budget
; water demand
; water table
; water use efficiency
英文摘要: An irrigation module considering irrigation water source and irrigation method has been incorporated into the ACME Land Model (ALM). Global numerical experiments were conducted to investigate irrigation effects and their sensitivity to irrigation water sources and irrigation methods. All simulations shared the same irrigation soil moisture target constrained by a global census data set of irrigation amounts. Irrigation has large impacts on terrestrial water balances especially in regions with extensive irrigation. Such effects depend on the irrigation water source: surface water-fed irrigation decreases runoff and water table depth, while groundwater-fed irrigation increases water table depth, and increases or decreases runoff depending on the pumping intensity. Irrigation effects also depend significantly on the irrigation method. Flood irrigation applies water in large volumes within short durations, resulting in much larger impacts on runoff and water table depth than drip and sprinkler irrigation. Differentiating the irrigation water source and method is important not only for representing the distinct pathways of how irrigation influences the terrestrial water balances, but also for estimating irrigation water use efficiency. Specifically, groundwater pumping has lower irrigation water use efficiency than irrigation relying on surface water withdrawal only due to enhanced recharge rates. Different irrigation methods also affect water use efficiency, with drip irrigation being the most efficient followed by sprinkler and flood irrigation. Our results highlight the importance of explicitly accounting for irrigation source and irrigation method, which are the least understood and constrained aspects in modeling irrigation water demand, water scarcity, and irrigation effects in Earth System Models. © 2017. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75756
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Joint Global Change Research Institute, Pacific Northwest National Laboratory, College Park, MD, United States; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States
Recommended Citation:
Leng G,, Leung L,R,et al. Significant impacts of irrigation water sources and methods on modeling irrigation effects in the ACME Land Model[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(3)