We have repeated 2-D single data acquisition on a playa before and after rain. We found that we could track the movement of the water through the playa system. Vp/Vs ratios have been found to be a better diagnostic of soil moisture then P-wave velocities alone. We plan to return to the same playa (that has lost its ability to retain water) and also do a new project on a playa that is known to retain water to study the differences in their subsurface structure. Our plan it to do a 4 -D experiment in both playas using both P and S wave source and three component Fairfield nodes.. Our hope is to gain a better understanding of the different hydraulic properties of a ponding vs and non ponding playa. We plan deployments between October 17 and 24 2017. And to repeat measurements between November 21 and December 5 2019.
EarthScope Consortium operates the
NSF Geodetic Facility for the Advancement of Geoscience (GAGE)
and NSF Seismological Facility for the Advancement of Geoscience (SAGE).
Any opinions, findings and conclusions, or recommendations expressed
in this material do not necessarily reflect the views of the
U.S. National Science Foundation.