Sustained Groundwater Loss in California's Central Valley Exacerbated by Intense Drought Periods

The accelerated rate of decline in groundwater levels across California's Central Valley results from overdrafting and low rates of natural recharge and is exacerbated by droughts. The lack of observations with an adequate spatiotemporal resolution to constrain the evolution of groundwater resources poses severe challenges to water management efforts. Here we present SAR interferometric measurements of high‐resolution vertical land motion across the valley, revealing multiscale patterns of aquifer hydrogeological properties and groundwater storage change. Investigating the depletion and degradation of the aquifer‐system during 2007–2010, when the entire valley experienced a severe drought, we find that ~2% of total aquifer‐system storage was permanently lost, owing to irreversible compaction of the system. Over this period, the seasonal groundwater storage change amplitude of 10.11 ± 2.5 km3 modulates a long‐term groundwater storage decline of 21.32 ± 7.2 km3. Estimates for subbasins show more complex patterns, most likely associated with local hydrogeology, recharge, demand, and underground flow. Presented measurements of aquifer‐system compaction provide a more complete understanding of groundwater dynamics and can potentially be used to improve water security.

[1]  K. Belitz,et al.  Character and Evolution of the Ground-Water Flow System in the Central Part of the Western San Joaquin Valley, California , 2018 .

[2]  R. Bürgmann,et al.  Global climate change and local land subsidence exacerbate inundation risk to the San Francisco Bay Area , 2018, Science Advances.

[3]  S. Werth,et al.  GRACE Detected Rise of Groundwater in the Sahelian Niger River Basin , 2017 .

[4]  M. Shirzaei,et al.  Aquifer Mechanical Properties and Decelerated Compaction in Tucson, Arizona , 2017 .

[5]  Dennis P. Lettenmaier,et al.  How much groundwater did California's Central Valley lose during the 2012–2016 drought? , 2017 .

[6]  T. Farr,et al.  Estimating the permanent loss of groundwater storage in the southern San Joaquin Valley, California , 2017 .

[7]  Upmanu Lall,et al.  Depletion and response of deep groundwater to climate-induced pumping variability , 2017 .

[8]  C. Faunt,et al.  Water availability and land subsidence in the Central Valley, California, USA , 2016, Hydrogeology Journal.

[9]  J. Brandt,et al.  Land subsidence in the San Joaquin Valley, California, USA, 2007–2014 , 2015 .

[10]  Manoochehr Shirzaei,et al.  Spatiotemporal characterization of land subsidence and uplift in Phoenix using InSAR time series and wavelet transforms , 2015 .

[11]  S. Swenson,et al.  Quantifying renewable groundwater stress with GRACE , 2015, Water resources research.

[12]  M. Watkins,et al.  Improved methods for observing Earth's time variable mass distribution with GRACE using spherical cap mascons , 2015 .

[13]  N. Diffenbaugh,et al.  Anthropogenic warming has increased drought risk in California , 2015, Proceedings of the National Academy of Sciences.

[14]  J. Famiglietti.  The global groundwater crisis , 2014 .

[15]  Felix W. Landerer,et al.  Seasonal variation in total water storage in California inferred from GPS observations of vertical land motion , 2014 .

[16]  Nancy L. Barber,et al.  Estimated use of water in the United States in 2010 , 2014 .

[17]  Frank Flechtner,et al.  Status of the GRACE Follow-On Mission , 2013 .

[18]  B. Scanlon,et al.  Ground water and climate change , 2013 .

[19]  Manoochehr Shirzaei,et al.  Time‐dependent model of creep on the Hayward fault from joint inversion of 18 years of InSAR and surface creep data , 2013 .

[20]  Manoochehr Shirzaei,et al.  A Wavelet-Based Multitemporal DInSAR Algorithm for Monitoring Ground Surface Motion , 2013, IEEE Geoscience and Remote Sensing Letters.

[21]  B. Scanlon,et al.  Impact of water withdrawals from groundwater and surface water on continental water storage variations , 2012 .

[22]  R. Reedy,et al.  Groundwater depletion and sustainability of irrigation in the US High Plains and Central Valley , 2012, Proceedings of the National Academy of Sciences.

[23]  B. Scanlon,et al.  Ground referencing GRACE satellite estimates of groundwater storage changes in the California Central Valley, USA , 2012 .

[24]  Manoochehr Shirzaei,et al.  Topography correlated atmospheric delay correction in radar interferometry using wavelet transforms , 2012 .

[25]  T. Burbey,et al.  Review: Regional land subsidence accompanying groundwater extraction , 2011 .

[26]  S. Swenson,et al.  Satellites measure recent rates of groundwater depletion in California's Central Valley , 2011 .

[27]  M. Bierkens,et al.  Global depletion of groundwater resources , 2010 .

[28]  K. Belitz,et al.  Development of a three-dimensional model of sedimentary texture in valley-fill deposits of Central Valley, California, USA , 2010 .

[29]  C. Faunt,et al.  Groundwater availability of the Central Valley Aquifer, California , 2009 .

[30]  S. Hensley,et al.  Radar interferometry , 2008, 2008 IEEE Radar Conference.

[31]  Howard A. Zebker,et al.  Inverse modeling of interbed storage parameters using land subsidence observations, Antelope Valley, California , 2003 .

[32]  T. Reilly,et al.  Flow and Storage in Groundwater Systems , 2002, Science.

[33]  R. Hanssen.  Radar Interferometry: Data Interpretation and Error Analysis , 2001 .

[34]  Michelle Sneed.  Hydraulic and mechanical properties affecting ground-water flow and aquifer-system compaction, San Joaquin Valley, California , 2001 .

[35]  Herbert F. Wang.  Theory of Linear Poroelasticity with Applications to Geomechanics and Hydrogeology , 2000 .

[36]  H. Zebker,et al.  Sensing the ups and downs of Las Vegas: InSAR reveals structural control of land subsidence and aquifer-system deformation , 1999 .

[37]  Riccardo Lanari,et al.  Synthetic Aperture Radar Processing , 1999 .

[38]  Kenneth W. Hudnut,et al.  Detection of aquifer system compaction and land subsidence using interferometric synthetic aperture radar, Antelope Valley, Mojave Desert, California , 1998 .

[39]  I. Jefferson,et al.  Soil mechanics in engineering practice , 1997 .

[40]  J. F. Poland,et al.  Land subsidence in the Santa Clara Valley, California, as of 1982 , 1988 .

[41]  D. C. Helm.  Field Verification of a One-Dimensional Mathematical Model for Transient Compaction and Expansion of a Confined Aquifer System , 1978 .

[42]  J. F. Poland,et al.  Land subsidence in the San Joaquin Valley, California, as of 1980 , 1975 .

[43]  P. Vaníček.  Further development and properties of the spectral analysis by least-squares , 1971 .

[44]  J. F. Poland,et al.  LAND SUBSIDENCE DUE TO WITHDRAWAL OF FLUIDS , 1969 .

[45]  C. E. Jacob.  On the flow of water in an elastic artesian aquifer , 1940 .