The scientific study of water is called hydrology. Hydrology is the study of occurrence, distribution, movement and properties of the waters of the earth and their relationship with the environment within each phase of the hydrologic cycle.

Hydrologists apply scientific knowledge to solve water related problems, problems of quantity, quality and availability.

Roughly, a hydrologist has expertise in the following :

Some of the sub-disciplines of Hydrology are:-

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Water Management