Arid
DOI10.1016/j.agwat.2010.02.009
Sensitivity of groundwater recharge under irrigated agriculture to changes in climate, CO2 concentrations and canopy structure
Ficklin, Darren L.1; Luedeling, Eike1,2; Zhang, Minghua1
通讯作者Zhang, Minghua
来源期刊AGRICULTURAL WATER MANAGEMENT
ISSN0378-3774
EISSN1873-2283
出版年2010
卷号97期号:7页码:1039-1050
英文摘要

Estimating groundwater recharge in response to increased atmospheric CO2 concentration and climate change is critical for future management of agricultural water resources in arid or semi-arid regions. Based on climate projections from the Intergovernmental Panel on Climate Change, this study quantified groundwater recharge under irrigated agriculture in response to variations of atmospheric CO2 concentrations (550 and 970 ppm) and average daily temperature (+1.1 and +6.4 degrees C compared to current conditions). HYDRUS 1D, a model used to simulate water movement in unsaturated, partially saturated, or fully saturated porous media, was used to simulate the impact of climate change on vadose zone hydrologic processes and groundwater recharge for three typical crop sites (alfalfa, almonds and tomatoes) in the San Joaquin watershed in California. Plant growth with the consideration of elevated atmospheric CO2 concentration was simulated using the heat unit theory. A modified version of the Penman-Monteith equation was used to account for the effects of elevated atmospheric CO2 concentration. Irrigation amount and timing was based on crop potential evapotranspiration. The results of this study suggest that increases in atmospheric CO2 and average daily temperature may have significant effects on groundwater recharge. Increasing temperature caused a temporal shift in plant growth patterns and redistributed evapotranspiration and irrigation water use earlier in the growing season resulting in a decrease in groundwater recharge under alfalfa and almonds and an increase under tomatoes. Elevating atmospheric CO2 concentrations generally decreased groundwater recharge for all crops due to decreased evapotranspiration resulting in decreased irrigation water use. Increasing average daily temperature by 1.1 and 6.4 degrees C and atmospheric CO2 concentration to 550 and 970 ppm led to a decrease in cumulative groundwater recharge for most scenarios. Overall, the results indicate that groundwater recharge may be very sensitive to potential future climate changes. (C) 2010 Elsevier B.V. All rights reserved.


英文关键词Hydrology Groundwater Recharge Vadose zone Climate change HYDRUS Agriculture
类型Article
语种英语
国家USA ; Kenya
收录类别SCI-E
WOS记录号WOS:000277689100011
WOS关键词ELEVATED CO2 ; EPIC MODEL ; HYDRAULIC CONDUCTIVITY ; CARBON-DIOXIDE ; WATER ; YIELD ; GROWTH ; PRODUCTIVITY ; TEMPERATURE ; RESPONSES
WOS类目Agronomy ; Water Resources
WOS研究方向Agriculture ; Water Resources
来源机构University of California, Davis
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/163054
作者单位1.Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 USA;
2.World Agroforestry Ctr ICRAF, Nairobi, Kenya
推荐引用方式
GB/T 7714
Ficklin, Darren L.,Luedeling, Eike,Zhang, Minghua. Sensitivity of groundwater recharge under irrigated agriculture to changes in climate, CO2 concentrations and canopy structure[J]. University of California, Davis,2010,97(7):1039-1050.
APA Ficklin, Darren L.,Luedeling, Eike,&Zhang, Minghua.(2010).Sensitivity of groundwater recharge under irrigated agriculture to changes in climate, CO2 concentrations and canopy structure.AGRICULTURAL WATER MANAGEMENT,97(7),1039-1050.
MLA Ficklin, Darren L.,et al."Sensitivity of groundwater recharge under irrigated agriculture to changes in climate, CO2 concentrations and canopy structure".AGRICULTURAL WATER MANAGEMENT 97.7(2010):1039-1050.
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