Land survey services include UXO survey, utility survey and seismic refraction.
Depending upon the project requirements and anticipated geology, we use a variety of seismic sources including a hammer impacting a metal plate, buffalo guns, weight drops, and if required, explosive sources. As the seismic energy travels through the material, it is refracted and reflected at the interface between these layers.
Where the velocity of the underlying layer is higher than that of the above layer, some of the seismic energy is critically refracted from the interface, travelling at the velocity of the lower layer refracting energy back to the surface. Geophones are placed on the surface, typically in a line, to record the incoming refracted waves. Typical applications include mapping the depth to bedrock, determining the rippability of bedrock and locating faults and fractures.
Read about our UAV and topographic services