The Hydrological cycle is also known as water cycle. water cycle is a regular moment of water on the above and below surface of earth.
Because of water cycle the mass of water on earth is always constant but in reservoirs, lake , rivers and sea etc. the quantity of water is different depends on the climate condition.
Important terminology in water cycle :-
Precipitation :- The water comes on the surface of earth in the form of rain.
Transpiration :- Release of water from leaves and trees
Evaporation:- Change of water into vapour