Physics
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012georl..3901301j&link_type=abstract
Geophysical Research Letters, Volume 39, Issue 1, CiteID L01301
Physics
Geodesy And Gravity: Transient Deformation (6924, 7230, 7240), Geodesy And Gravity: Tectonic Deformation (6924), Geodesy And Gravity: Satellite Geodesy: Results (6929, 7215, 7230, 7240), Hydrology: Groundwater Hydrology, Hydrology: General Or Miscellaneous
Scientific paper
Changes in groundwater levels cause water-bearing basins to deform. Here we provide a detailed history of horizontal surface displacements in the San Gabriel Valley, California, which we show are highly correlated with the water level changes measured at a nearby well: correlation coefficient of 0.96 ± 0.01. We use the surface response from a one year period during which water level change in the nearby well was over 16 m, to monitor the deformations over a 14 year period from 1998 to 2011. The water level changes lead surface deformation by 21 days, but the significance of the offset is only weakly supported (p-value = 0.129). The projection method can be used as a real-time monitoring or detection system for deformation caused by a variety of mechanisms such as fluid injection and removal (groundwater development, oil production, carbon sequestration), and by seismic and volcanic activity.
Herring Thomas A.
Ji Kang Hyeun
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