Geophysical Surveys use ground-based physical sensing technology to map detectable below-ground features, structures and anomalies.
We use magnetometry, Electro-Resistive Tomography (ERT) and Ground Probing Radar (GPR), along with other technologies, to capture accurate information on the hidden environment. When combined with our bespoke GPRCAD software, we can provide you with best-in-class mapping solutions for your site.
ERT senses differences in the electrical resistance of the subsurface soil along a survey line. It does this by injecting a current into the surface which reads corresponding pairs of electrodes. Resistivity data is recorded through combinations of current and potential electrode pairings to form a cross section of apparent resistivity below the ground. As different below-ground features such as walls, cavities and service conduits all have different resistivity to the surrounding medium, these will be detected and recorded. It is also possible to create 3D models of what is below the surface by deploying the electrodes around the area of investigation.
GPR emits radio waves into the ground using array-mounted antennae, which can be vehicle-towed or hand pushed. Subsurface structures reflect the radio signal back toward the array, where it is detected and recorded.
When the data from these technologies is combined and analysed we can establish the presence of voids, buried metallic objects, utilities, ground water, changes in the geological subsurface structure, hydro-carbon deposits, areas of contamination and archaeological features.
Our Geophysical Surveys are non-intrusive and non-destructive ways to offer you bespoke information relating to your site.
Our methods allow greater coverage, when compared with more intrusive methods such as borehole drilling and direct observation.
Our highly qualified Geophysical team will find a solution that meets your requirement and deliver the results that you need to enhance your understanding of your environment.
We respect our clients and colleagues, our working environment and equipment and everyone we meet in a professional capacity.
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