My stone circle at Kirkhaugh has a limestone riverbed and in summer, low flow, the water disappears down a pothole, above the circle, and reappears from another pothole, below the circle.
Not all sources of water are the same and, with taps, we've forgotten about having to find and carry water. Sometimes a spring will be good most of the year and then go bad in the hot weather. Some are bad all the year round, or brackish. Water is blessed heavy to carry, as anyone who's lived in a house without running water will confirm. No water, no life ...