Entries in ground water (2)

Tuesday
Nov292016

Salt storage impact to potable water supply

Xenon completed an electromagnetic survey to map the distribution of chlorides in shallow soils in the vicinity of a supply well.  Magnetic gradiometry data were collected to evaluate the presence of abandoned well casings.  The results are compelling and show the influence of previously unmapped utility corridors that were likely installed for an interment camp that was located at the site in the 1940s. 

This image shows areas of increased conductivity (red-orange) that are attributed to chloride content with distinctly linear anomalies interpreted as underground utilities.  Soil sampling corroborated the results.background impagery per Google Earth Pro.

Tuesday
Nov062012

Measuring Ground Water from Space, 2002-2012

Measurements of ground water—rather than water on the surface—reveal the long-term effects of drought. These maps show ground water conditions in the U.S. compared to the long-term average from August 2002 to August 2012. (Map by Chris Poulsen, National Drought Mitigation Center, based on data from the GRACE science team.)

See the video at and learn more at http://earthobservatory.nasa.gov/Features/GRACEGroundwater/