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Can I detect the presence of water?

Geophysical techniques detect the response of a subsurface geology or object based on excitation of that body by a physical phenomenon such as a sound wave, electromagnetic wave, gravitational field. These responses are not unique. In the case of the Stratagem it is the response to an electromagnetic field that is used to create a resistivity map of the subsurface and that is correlated the true geologic structure. However there is no one value associated with the presence of water. The measured value in Ohm-meters is determined but the water’s ionic content (salt), saturation level, and the type of geologic structure containing the water. The map is used to by the geophysicist or hydrogeologist to predict the most likely location of water based on knowledge of local conditions and general hydrogeologic principles.

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