GSTDTAP  > 气候变化
DOI10.1002/2017GL073333
How much groundwater did California's Central Valley lose during the 2012-2016 drought?
Xiao, Mu1; Koppa, Akash2; Mekonnen, Zelalem2; Pagan, Brianna R.2; Zhan, Shengan1; Cao, Qian1; Aierken, Abureli3; Lee, Hyongki3; Lettenmaier, Dennis P.1
2017-05-28
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2017
卷号44期号:10
文章类型Article
语种英语
国家USA
英文摘要

We estimate net groundwater storage change in the Central Valley from April 2002 to September 2016 as the difference between inflows and outflows, precipitation, evapotranspiration, and changes in soil moisture and surface water storage. We also estimate total water storage change attributable to groundwater change using Gravity Recovery and Climate Experiment (GRACE) satellite data, which should be equivalent to our water balance estimates. Over two drought periods within our 14-1/2years study period (January 2007 to December 2009 and October 2012 to September 2016), we estimate from our water balance that a total of 16.5km(3) and 40.0km(3) of groundwater was lost, respectively. Our water balance-based estimate of the overall groundwater loss over the 14-1/2years is -20.7km(3), which includes substantial recovery during nondrought periods The estimated rate of groundwater loss is greater during the recent drought (10.0 +/- 0.2 versus 5.5 +/- 0.3km(3)/yr) than in the 2007-2009 drought, due to lower net inflows, a transition from row crops to trees, and higher crop water use, notwithstanding a reduction in irrigated area. The GRACE estimates of groundwater loss (-5.0km(3)/yr for both water balance and GRACE during 2007-2009, and -11.2km(3)/yr for GRACE versus -10km(3)/yr for water balance during 2012-2016) are quite consistent for the two methods. However, over the entire study period, the GRACE-based groundwater loss estimate is almost triple that from the water balance, mostly because GRACE does not indicate the between-drought groundwater recovery that is inferred from our water balance.


英文关键词groundwater loss Central Valley water balance
领域气候变化
收录类别SCI-E
WOS记录号WOS:000404131900060
WOS关键词TEMPERATURE
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/27542
专题气候变化
作者单位1.Univ Calif Los Angeles, Dept Geog, Los Angeles, CA 90024 USA;
2.Univ Calif Los Angeles, Dept Civil & Environm Engn, Los Angeles, CA USA;
3.Univ Houston, Dept Civil & Environm Engn, Houston, TX 77204 USA
推荐引用方式
GB/T 7714
Xiao, Mu,Koppa, Akash,Mekonnen, Zelalem,et al. How much groundwater did California's Central Valley lose during the 2012-2016 drought?[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(10).
APA Xiao, Mu.,Koppa, Akash.,Mekonnen, Zelalem.,Pagan, Brianna R..,Zhan, Shengan.,...&Lettenmaier, Dennis P..(2017).How much groundwater did California's Central Valley lose during the 2012-2016 drought?.GEOPHYSICAL RESEARCH LETTERS,44(10).
MLA Xiao, Mu,et al."How much groundwater did California's Central Valley lose during the 2012-2016 drought?".GEOPHYSICAL RESEARCH LETTERS 44.10(2017).
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