The diagram details the rotation of water in nature.
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Overall, the cycle consists of four phases, starting from oceanic evaporation and culminating in surface water flowing back into the world’s ocean.
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In the first stage of the process, liquid water in the ocean evaporates in the full glare of the sun and, under appropriate conditions, condenses and forms clouds. When influenced by the right level of humidity and other situational factors, these clouds fall down as precipitation, which is usually in the form of rain and snow. In the next stage, surface water resulting from the melting of snow and the gathering of surface runoffs is carried by a network of streams and rivers towards the sea, with a substantial part of this water permeating the ground above the impervious layer and transporting itself as groundwater in the same direction with that of surface water. Eventually, both water streams converge and pass through river mouths, where and in the vicinity of which exists the phenomenon of water intrusion, before immersing in the sea to form a closed hydraulic cycle in nature.