Plenty of scientific proof that dowsing is absolute nonsense, enough to disregard it completely.
Wiki below, but google for a wealth of other info regarding it.
Dowsing is a type of pseudoscientific
divination employed in attempts to locate
ground water, buried metals or
ores, gemstones,
oil,
gravesites,
[1] malign 'earth vibrations'
[2] and many other objects and materials without the use of a scientific apparatus. It is also known as
divining (especially in reference to the interpretation of results),
[3] doodlebugging[4] (particularly in the United States, in searching for petroleum
[5]) or (when searching for water)
water finding,
water witching (in the United States) or
water dowsing.
A Y-shaped twig or rod, or two L-shaped ones—individually called a
dowsing rod,
divining rod (Latin: virgula divina or baculus divinatorius), "vining rod", or
witching rod—are sometimes used during dowsing, although some dowsers use other equipment or no equipment at all.
Dowsing is a
pseudoscience and the
scientific evidence is that it is no more effective than
random chance.
[6][7] Dowsers often achieve good results because random chance has a high probability of finding water in favourable terrain.
[8] The motion of dowsing rods is now generally attributed to the
ideomotor phenomenon,
[9][10][11] a psychological response where a subject makes motions unconsciously. Put simply, dowsing rods respond to the user's accidental or involuntary movements.