Hydrological Cycle

From HydroWiki

The hydrological cycle is the continuous process of water circulating throughout the earth’s hydrosphere. The major processes of the cycle are precipitation, runoff to bodies of water, and evaporation.

Source: Chow, Vin Te. Applied Hydrology. McGraw Hill, 1988. pg 3. Source: http://ga.water.usgs.gov/edu/watercycle.html