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.

Thursday
Nov172016

announcing Dr. Howell

Samuel Howell completed his dissertation defense on Nov. 15, wrapping up his work at U Hawaii SOEST.  Next he moves to Pasadena for post-doc work at JPL where he will work on the Europa mission. 

Well done!  Congratulations!

Monday
Oct032016

Indiana Water Monitoring Council

I am pleased to be invited to join the board of directors of the Indiana Water Monitoring Council. It will be a pleasure to work with this dedicated group of professionals!

 

Friday
Sep092016

Low Head Dam Removals

Attended an excellent workshop on the removal of low head dams.  Their impacts can be far-reaching and include public recreational use, stream ecology, water resources, the transport of sediment and bound contaminants and others. It is key to understand the complexities of each dam and its unique local environment.

Wednesday
Jul272016

Electromagnetic survey for mapping near-surface chlorides

The EM-31 is an excellent tool when the depth of interest < 6 meters.  Here it is coupled with a DGPS receiver to provide very rapid mapping even when on foot. 

This survey mapped near-surface chlorides (high electrical conductivity) and deep utility corridors that serve as possible migration pathways.  Results shown >here<

Action pose during data collection.  Good conditioning prior to our Wales Coastal Path hike.