This article describes a 24-hour daily activity of ground water cycle. It first proves the existence of vapour up-flux using a custom-made reflective carpet. At high grounds of equatorial altitudes above 1500 meter (less than that for other latitudes), water vapour is thought to be condensed forming fresh water within mountains. An evidence of this was found in several sites in Saudi Arabia, where fresh water down-streams from these mountains and pops-out of mountain sides or up from ground

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... ace. Photos of such streams are presented. Another evidence of these rivers is presented in photos of green coastal regions in Saudi Arabia. The paper urges researchers to make concise annual water-budget studies for major known rivers in the world, to prove that rainfall in the basin of each of them runs severely short to explain the annual river flow quantity.