The traditional method, or water dowsing /divining makes use of the Y branch, a water filled bottle, L rods, pendulums etc. This method is used extensively in South Africa and is surprisingly effective. Good water dowers with experience are able to predict breaks, depths and expected yields to a great degree of accuracy. One must use caution in high mineral bearing areas as minerals in the earths crust can mimic the feel of breaks and errors can occur.
Geological surveys make use of resistance mapping to locate flaws and soft zones in the earths crust in which water may be resident. This method of surveying, being scientific is usually more expensive than the traditional method as more manpower is required and the time needed can be extensive.Learn More