Any underground flowing water, due to its friction in its "banks", radiates energy vertically, carrying information about its parameters. This energy is distributed at a fairly high height above the earth's surface. I know a dowser who has successfully searched for oil and underground flowing water from a helicopter.

The energy emitted by these waters has one common ingredient - the energy of underground flowing water, regardless of the temperature of the water, its chemical composition, the depth at which it is located, its flow rate, etc.

The dowser must be able to set his brain to vibrate with the frequencies common to all underground flowing waters.

So, while he searches for the waters on a map of the area, on a photograph of the area or on the field itself, the dowsing tools he holds in his hands (pendulum, baguettes) will register the resonance between his body and the underground flowing water.

A dowser sufficiently experienced and in good condition at the time of searching for underground streams should show 100% percent accuracy rate.

At this stage I cannot list the pros and cons of water detection with GPR. I know from two drillers that in the last two years they have failed to drill for water in over 200 locations surveyed with Georadar. Of course, there are georadars with different capabilities and prices from a few thousand to a hundred thousand BGN. The experience of the operator is also important.

I also know that some of the surveyors with Georadar necessarily check with the dowsing method. They're so convinced that it's worth it that they include it in their ads as an advantage over their GPR-only counterparts.

Many of the water prospectors in Bulgaria (and not only) work together with dowsers. Others have acquired GPR and believe more in the technique than in the capabilities of the human body. In the USA, a competition and demonstration of the capabilities of dowsers from all over the world is held annually on a large field. Those dowsers that show the best results are immediately invited to work by companies exploring not only underground water, but also oil, gas, gold, diamonds, iron ores, etc.

One of my dowsing teachers spent 7 years discovering oil, gas and water from a helicopter over vast areas in the Soviet Union. And he was very successful water prospector. He pointed out "underground rivers" in the Libyan desert with great accuracy and amazed the Libyan surveyors with his skills.

A large part of the Bulgarian surveyors do not want to work with dowsers due to purely economic interests:

• they are also paid for unsuccessful drilling. After unsuccessful drilling they continue to search in this terrain until they finally discover water;
• the dowser deprives them of the opportunity to make a series of exploratory drillings, which are also paid to them;
• the dowser protects the land owner from the "disappearance" of the water in a cavern (underground cavity) located under the water vein;
• some drillers say that wherever you drill for water, you will always find water. If it doesn't come up at 30 meters deep, it will appear at 50 or 100 meters. The further down one drills, the more profitable it is for the driller and the less profitable for the service payer. The dowser can point to the closest underground running water to the surface, having sufficient flow and good quality. It can also indicate where a single borehole will draw water from several streams (aquifers).