The definition of hydrology is the branch of science or geology that studies the Earth's water.
The study of how the major bodies of water have shifted, expanded and changed land masses is an example of hydrology.
the science dealing with the waters of the earth, their distribution on the surface and underground, and the cycle involving evaporation, precipitation, flow to the seas, etc.
Origin of hydrologyModern Latin hydrologia: see hydro- and -logy
The scientific study of the properties, distribution, and effects of water on the earth's surface, in the soil and underlying rocks, and in the atmosphere.
- hy′dro·log′ic hy′dro·log′i·cal
(usually uncountable, plural hydrologies)
hydro- + -ology