DOI: 10.1002/2015MS000437
Scopus记录号: 2-s2.0-84945475487
论文题名: A modeling study of irrigation effects on global surface water and groundwater resources under a changing climate
作者: Leng G ; , Huang M ; , Tang Q ; , Leung L ; R
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 7, 期: 3 起始页码: 1285
结束页码: 1304
语种: 英语
英文关键词: Climate change
; Groundwater
; Groundwater resources
; Irrigation
; Pumps
; Surface water resources
; Water resources
; Water supply
; CLM
; Food and agricultural organizations
; General circulation model
; Global
; Global water resources
; Groundwater pumping
; Regional climate changes
; Surface water and groundwaters
; Surface waters
; climate change
; environmental impact
; flow pattern
; general circulation model
; groundwater resource
; irrigation system
; model validation
; pumping
; vulnerability
; water demand
; water management
; water supply
英文摘要: This study investigates the effects of irrigation on global water resources by performing and analyzing Community Land Model 4.0 (CLM4) simulations driven by downscaled/bias-corrected historical simulations and future projections from five General Circulation Models (GCMs). For each climate scenario, three sets of numerical experiments were performed: (1) a CTRL experiment in which all crops are assumed to be rainfed; (2) an IRRIG experiment in which the irrigation module is activated using surface water (SW) to feed irrigation; and (3) a PUMP experiment in which a groundwater pumping scheme coupled with the irrigation module is activated for conjunctive use of surface water and groundwater (GW) for irrigation. The parameters associated with irrigation and groundwater pumping are calibrated based on a global inventory of census-based water use compiled by the Food and Agricultural Organization (FAO). Our results suggest that irrigation could lead to two major effects: SW (GW) depletion in regions with irrigation primarily fed by SW (GW), respectively. Furthermore, irrigation depending primarily on SW tends to have larger impacts on low-flow than high-flow conditions, suggesting increased vulnerability to drought. By the end of the 21st century, combined effect of increased irrigation water demand and amplified temporal-spatial variability of water supply may lead to severe local water scarcity for irrigation. Regionally, irrigation has the potential to aggravate/alleviate climate-induced changes of SW/GW although such effects are negligible when averaged globally. Our study highlights the need to account for irrigation effects and sources in assessing regional climate change impacts. © 2015. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75991
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: Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States; Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Leng G,, Huang M,, Tang Q,et al. A modeling study of irrigation effects on global surface water and groundwater resources under a changing climate[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,7(3)