4.3. Underground Water Streams

Underground water streams create special natural channels. In dry seasons, the water dries up and when it begins to rain again, the water may go in another direction and then form a channel in another place. Water streams radiate vertically and have two pairs of side rays: one pair radiating at the angle of 45 degrees and the other at the angle of 75 degrees to the main vertical line. The width of the main vertical line depends on the rate of water flow of the highest intensity, whereas the side lines are rather weak.