Original: The term hydrology is from Greek: á 1\/2 Î Ï Ï, hydÅ r, "water"; and Î "Ï Î Î Ï, logos," study ".
Simplified: Hydrology (from Greek: YÎ Ï Ï, hudÅ r, "water"; and Î "Ï Î Î Ï, logos," study ") is the study of movement, distribution, and quality of water throughout the Earth.