what is hydrology.
Hydrology is the study of water. Water is one of our most important natural resources. Without it, there would be no life on earth. The supply of water available for our use is limited by nature. Although there is plenty of water on earth, it is not always in the right place, at the right time and of the right quality.
Surface hydrology is the study of hydrologic processes that operate at or near Earth's surface. Drainage basin management covers water-storage, in the form of reservoirs, and flood-protection. Water quality includes the chemistry of water in rivers and lakes, both of pollutants and natural solutes.