In the hydro – logical cycle, the circulation of water takes place independently also in different spheres. In this, translocation of moisture from one place to another place by vertical and horizontal circulation of air in the atmosphere, water circulation by sea currents in the hydrosphere, and from the lithosphere the water flows towards the seas through the rivers and glaciers.
In the same way, it reaches in vaporized form from the soil and by transpiration from the plants through the process of palpitation into the surface. Only 1 % of the water available on the earth circulates in the hydro – logical cycle every year. A large part of the water involved in hydro – logical cycle is the pure water.
