Definition of Hydrologic Cycle

Hydrologic cycle or water cycle is a biogeochemical cycle in which the continuous circulation of water that is taking place in the atmosphere of the earth is involved. The most pivotal processes that are being involved in the cycle are evaporation, transpiration, condensation, and precipitation. The amount of water continuously changes among these different processes but remains exactly the same within the cycle.


The factors that influence the rate of these processes are temperature, humidity, speed of the wind, and radiation from the sun, etc. When the water flows around the Earth, above or beneath it, it becomes a source of cycling of other biogeochemical such as carbon, nitrogen, sulfur, etc.

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