Drainage refers to the network of rivers, streams, and water bodies through which water flows from higher to lower altitudes, eventually reaching seas, oceans, or inland basins. Drainage systems are critical for maintaining ecological balance, supporting human settlements, and enabling agricultural and economic activities.

Definition and Its Importance

1.Definition: Drainage is the natural or artificial removal of surface and subsurface water from an area. It includes rivers, lakes, streams, and their tributaries that form a drainage basin or watershed.

2.Importance of Drainage Systems

i.Agriculture: Rivers provide water for irrigation, enabling the cultivation of crops in arid and semi-arid regions.

ii.Economic Activities: Rivers are sources of hydroelectric power, navigation, and freshwater for industries.