Groundwater Geophysics


A variety of geophysical methods can be used to optimize water well yield and water quality. We have extensive experience utilizing these methods to help characterize aquifers, map site hydrogeology, assess subsurface groundwater quality, and to optimize water well placement and design. Collier’s suite of geophysical solutions provides our clients with detailed subsurface information to assist in making expert decisions on resource location, availability, and quality. A hydrogeophysical assessment can significantly increase the chance of maximizing your water supply resource while minimizing the amount of test drilling.

ERT Survey to Map Saltwater Intrusion in a Coastal Aquifer
ERT Survey to Map Saltwater Intrusion in a Coastal Aquifer

Groundwater Applications

  • Lithology mapping & geological characterization
  • Aquifer characterization
  • Water table depth
  • Overburden thickness
  • Bedrock topography & paleo channel mapping
  • Fractures, fault, & karst mapping
  • Groundwater quality mapping
  • Saltwater intrusion & brackish water mapping
  • Siting of monitoring wells & production wells
  • 2-D & 3-D imaging
  • Map aquifers & site high capacity wells
  • Find fractures & faults
  • Regional basin studies
  • Map saltwater intrusion plumes
  • Map the top of bedrock or confining units
  • Map karst features
  • Measure interval head & transmissivity in open boreholes
  • Differential flow studies to identify zones of poor water quality in production wells

Our sector leaders, John Jansen P.G., P.Gp., Ph.D. and Doug Laymon, P.G., are geophysicists with extensive experience in hydrogeology. We understand what data you need and can help you plan a survey that will significantly increase your understanding of your site and produce a better result for your client.

Groundwater Geophysics Contacts

For more information on groundwater geophysics services or to inquire about working with us, please contact one of our representatives.

John Jansen
Ph.D., P.Gp., P.G.

Principal Geophysicist / Hydrogeologist

(239) 896-0576

Doug Laymon

Principal Geophysicist /
Operations Lead

(512) 995-6995