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2. Dowsing - Wikipedia

   en.wikipedia.org/wiki/Dowsing

   A dowser, from an 18th-century French book about superstitions. Dowsing is a type of divination employed in attempts to locate ground water, buried metals or ores, gemstones, oil, claimed radiations (radiesthesia), [1] gravesites, [2] malign "earth vibrations" [3] and many other objects and materials without the use of a scientific apparatus.

3. Water detector - Wikipedia

   en.wikipedia.org/wiki/Water_detector

   Current digital water leak detection systems can locate multiple water leaks to within 1 meter resolution over a complex network of cables running several kilometers. This functionality reduces the downtime and potential damage caused by inaccurate reporting that was common with older analogue based systems.

4. Ground-penetrating radar - Wikipedia

   en.wikipedia.org/wiki/Ground-penetrating_radar

   Borehole radars utilizing GPR are used to map the structures from a borehole in underground mining applications. Modern directional borehole radar systems are able to produce three-dimensional images from measurements in a single borehole. [8] One of the other main applications for ground-penetrating radars is for locating underground utilities.

5. Satellites, AI will help state identify leaks in water ... - AOL

   www.aol.com/satellites-ai-help-state-identify...

   The $474,000 program, Hydro Delta, will use satellite imaging and monitoring of soil moisture, vegetation health and temperature to detect unusual activity that could be evidence of an underground ...

6. What are leaking underground storage tanks and how are ... - AOL

   www.aol.com/news/leaking-underground-storage...

   Roughly 81 million people live within a quarter-mile of an underground storage tank that's experienced at least one leak, based on the latest EPA data. Most tanks were made of steel in the mid ...

7. Leak detection - Wikipedia

   en.wikipedia.org/wiki/Leak_detection

   If a leak occurs, the substances to be measured come into contact with the tube in the form of vapour, gas or dissolved in water. In the event of a leak, some of the leaking substance diffuses into the tube. After a certain period of time, the inside of the tube produces an accurate image of the substances surrounding the tube.