The Flow layer shows you where the water flows
in flood. The darker the blue, the more water moves
through the area.
Studying the Flow Layer can show you where
the gold is most likely to have accumulated.
It gives you a good visualization of the complete
water flow, showing you gulches and depressions that
you may have overlooked.
You may be able to see that "Honey Hole"
on the other side of the hill that no one has yet prospected!