The science of hydrology deals with the occurrence and movement of water on and over the surface of the earth. It deals with the various forms of moisture that occur, the transformation between the liquid, solid and gaseous states in the atmosphere and in the surface layers of land masses. It is concerned also with the sea: the source and store of all the water that activates life on this planet.
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Ph.D., M.Sc., F.I.C.E. E. M. Wilson
- Macmillan Education UK