In our residential complex, we decided to get a bore-well dug because of water supply shortage.
We called a fellow to select the points for boring. He came with two copper rods or may be tubes bent in `Z' shape, but with almost perfect right angles at bends. Length of each rod may be approx 500 mm (100 + 300 + 200 mm). After a brief prayer, I saw him holding the two rods parallel in two hands and walking straight from different directions at convenient places where we expected boring to be done. At the point where ground water stream was expected, the road ends were moving apart in his hands by approx 30 deg. He confirmed three points for boring by moving from different directions, in the order of preference. We did the boring at the point of hid first preference and managed to get good water @ 10,000 lts / hour at a depth 350 ft. Some of our residents felt that we should go for one more bore-well and called another fellow who used a coconut for finding the points for boring. He located again two points, but I was not present. Boring was abandoned at first point after 60 ft because of loose soil and at second point after reaching 375 feet depth as hardly any water was found.
Is there any scientific explanation for these water detection methods? Or it is done just by luck or intuition? Is there any scientific method to find out the ground water source for bore-well with depth and expected quantity?
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