Aussie put that water travels from south to north. If this is generally true (?) then would it also be true in the northern hemisphere? He's in Australia and I'm in Oklahoma. When you flush a toilet or drain a bathtub the whirlpool spins one way on the north of the equator and the other way on the south of the equator... or so I've heard. I've always thought that water ran downhill, seeking its own level, unless under pressure. What if downhill in an underground stream just happens to be east or west? Most of the water wells in my area are in a porous sand formation, and here in the city where I live, the water is best at about 180 feet. The water table is higher, but not enough permeability, (porosity), at higher levels. Say you drill a well for fresh water here at 100". You'll hit water, but you won't have much volume. Demand outrunning supply will allow silt and ultrafine sand to come in and eat up your pump.
I tried dowsing the image and got a few responses, but the strongest pull was right in the area Art indicated. Also I got a few shallower pulls at this spot, but strongest pulls from 125 to 240 feet depth, indicating to me "bands" of porosity for good volume. I'd personally stay around the center of the area art marked as the northern line seems thin to me. The underground area has somewhat of a banana shape. Also, the deeper end of my readings seemed to have a bit of salinity(salt), and I am sure you don't want brackish water, so I'd try to about 200 feet for good clean cool fresh safe "potable" drinking water. (fingers crossed). Whatever you do, good luck.
-bill-
-bill-