Much is touted about the use of GPR for the detection of illegal water connections. But: Is there any independent evaluation, which also exposes the limitations and problems of the use of GPR for the detection of illegal water connections?
For example:
How it behaves on different types of soil?
How often the detections of illegal connections turned out to be wrong (other tipe of pipes or no pipe at all)?
Can the GPR detect bypass just below the legal connection?
Every GPR system contains one or multiple antennas. These antennas transmit and receive radio frequency waves.
GPR has the same basic principles as a metal detector. A metal detector sends energy into the earth in up to 17 frequencies. When that energy meets a metallic object, it is translated into a recognizable tone. The GPR sends out millions of frequencies that return to the antenna and translate material composition definition in the subsurface. Radar is sensitive to changes in material composition.
Radar GPR Systems are designed to display differences in material composition. They can be used to locate any object that has a different composition than it's surrounding materials. For example, water, a PVC pipe will have a different composition than the surrounding soil. Voids and excavations that have been filled in will also have different compositions than the surrounding soil.
The depth of your findings will be determined by three factors:
Soil type
Antenna frequency
Size of Target
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