The methodology of a ground penetrating radar (GPR) survey involves several key steps. First, the area of interest is identified and prepared, ensuring that it is accessible and safe for surveying. The GPR equipment is then set up and calibrated to the specific conditions and objectives of the survey site. During data collection, the GPR unit emits electromagnetic pulses into the ground, which penetrate the subsurface and reflect underground features or interfaces between different materials.
These reflected signals are received by the GPR antenna and processed to create a cross-sectional image of the subsurface.
A GPR study works by transmitting short pulses of high-frequency electromagnetic waves into the ground using a transmitting antenna. These waves move through the ground and reflect off the surface when they encounter changes in the properties of materials or buried objects, such as pipes, utilities, voids, or archaeological features. The receiving antenna captures the reflected signals, which are then processed by the GPR system to generate a subsurface profile.
By analyzing the time it takes for signals to return and their amplitude, GPR can provide information about the depth, location and characteristics of underground structures or anomalies.
A Ground Penetrating Radar Method Statement describes the procedures and protocols to follow during a GPR survey to ensure accuracy, safety and efficiency. It typically includes details such as site preparation, equipment setup and calibration, data acquisition parameters (such as antenna frequency and scan parameters), data interpretation methods. data, security measures and reporting requirements.
The method statement ensures that the investigation is conducted systematically and in accordance with industry standards and client requirements, addressing factors such as environmental conditions and potential risks to personnel or equipment during the process investigation