In the sense that it finds underground water, water dowsing does not work. Water dowsing involves the claim that a person can locate underground sources of water without using any scientific instruments. ... The dowsing rods do indeed move, but not in response to anything underground.

What do dowsing rods detect?

In water divining, dowsers use two rods or a single forked stick to detect underground water sources. They believe that when they walk over a water source, the rods will spontaneously cross or the stick will suddenly jerk downward.

How do dowsing rods find water?

Grab both ends of the Y in an underhanded grasp (so that the heels of your hands are facing towards the sky, as shown in the photo), and hold the dowsing rod horizontally so that it points in front of you. Keep your grasp somewhat loose and slowly walk around searching for water.