Geophysics & Field Exploration

New data acquisition relies on understanding the capabilities and limitations of exploration tools to locate and characterize groundwater and the subsurface. Together with several key industry and academic parties, we are therefore continuously researching and developing new exploration equipment that augment existing and proven technology.

saline intrusion mapping

mapping of fresh-salt water interface in coastal areas of the netherlands.
On the Wadden islands of the Netherlands, saline groundwater and intruding seawater threatens the sustainable supply of fresh water resources. As part of a broader study of the water supply company, groundwater salinity mapping was conducted involving forward and inverse geophysical modelling and application of TDEM and ERT/CVES land geophysics.

dike composition mapping

dike composition survey using non-conventional techniques
For the assessment of dike and levee strength as part of flood reduction studies, dike/levee composition is generally deducted from drilling samples and cone penetration tests (CPT's) taken at various locations. For the improvement of geotechnical profiles and the exploration of very local - and therefore sometimes overlooked - geological features or layers, non-intrusive geophysics can be invaluable. For the water board of Rijnland, a series of surveys were conducted, using frequency and time domain electromagnetics, (continuous vertical) electrical soundings and microwave surveying.