The Groundwater Resources Association (GRA) recognizes that due to travel and meeting restrictions relating to COVID-19 precautions it may not be currently possible to gather colleagues to attend this GRACast. If your office has purchased a registration with the intent of having multiple colleagues participate, GRA will allow you to share the login information with your office colleagues so you may call in from multiple locations. We strive to remain agile based on the current public health situation and desire to support our members in the best ways possible.

We will return to our normal policy of one login per location or office in the future.

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Electrical Hydrogeology: Building Aquifer Conceptual Models from Airborne and Ground Electrical Datasets

Presented By:

Dr. Todd Halihan, Ph.D., P.Gp, Oklahoma State University

SUMMARY OVERVIEW OF GRACAST:

The use of electrical data to provide denser datasets for conceptualizing flow and transport in aquifers is on the rise due to technology improvements and demonstrated cost effectiveness. Airborne electromagnetic (AEM) surveys provide large coverage of aquifer areas to detect regional scale flow paths and dominant fracture pathways. Ground-based electrical resistivity imaging (ERI) surveys provide controlled higher resolution evaluation of potential drilling targets identified by AEM, to further quantify hydrogeologic parameters and assess validity of drilling targets. Temporal electrical resistivity imaging (TERI) can also be deployed to monitor and observe aquifer flow processes over time. As increasing amounts of data are collected and tested in a specific aquifer, the parameterization across the datasets becomes stronger over time. This talk will illustrate the integration of airborne and ground electrical datasets with targeted traditional drilling/sampling data, to build robust conceptual models containing well defined preferential pathways at the regional scale.

 

SPEAKER BIO:

Dr. Todd Halihan, Ph.D., P.Gp, Oklahoma State University

Dr. Halihan is a Professor and the Sun Company Clyde Wheeler Chair in Hydrogeology at Oklahoma State University, and Chief Technical Officer for Aestus, LLC. Dr. Halihan’s professional interests center in subsurface characterization using electrical hydrogeology and sustainable water supply. He has been an associate editor for Ground Water and has served as the Secretary-Treasurer of the U.S. Chapter of the International Association of Hydrogeologists. He served as the Chair of the Hydrogeology Division and the South-Central Section of the Geological Society of America. He served as the National Ground Water Association’s 2018 McEllhiney Lecturer. Dr. Halihan is the recipient of the Karin and Robert J. Sternberg Award for Excellence, the Partners in Conservation Award from the U.S. Department of Interior, and the Sterling L. Burks Award for environmental research. He is also a professional geophysicist (CA), professional driller (OK) and a PADI divemaster. He has provided input to stories on CBS, Fox News, NPR, CNBC, Popular Science, the New Yorker and the New York Times.

 

 

BECOME A SPONSOR!

Contact Staff at staff@grac.org

Gold:

  • Recognition on the sponsored GRACast page of the website
  • Special thanks and priority placement of your logo on all promotional emails relating to the sponsored cast (time permitting)
  • Special thanks and priority placement of your logo on two presentation slides, one at the beginning and another at the conclusion of the cast
  • Opportunity to provide a bio of your company for the moderator to read at the intro of the cast
  • One 1/3 page ad in HydroVisions
  • Two registrations to the sponsored cast

Silver: 

  • Recognition on the sponsored GRACast page of the website 
  • Special thanks and your logo on all promotional emails relating to the sponsored cast (time permitting) 
  • Special thanks and your logo on two presentation slides, one at the beginning and another at the conclusion of the cast 
  • One registration to the sponsored cast

 

CONTACT INFORMATION:

If you have any questions, please contact John Lambie at jlambie@e-purwater.com or (209) 451-5933.



Date and Time

Thu, March 31, 2022

noon - 1 p.m.
(GMT-0700) America/Los_Angeles

Location

Login Instructions will be in included in an email the day of the event.



This GRACast will use zoom webinar.

Event has ended

Group(s): GRA