What is a Drainage Basin?

• A. A controlled area for managing excess water.
• B. An area that collects water from various sources like streams and creeks.
• C. A reservoir used exclusively for drinking water.
• D. A technique for purifying water.

Answer: (B)

A drainage basin, also known as a watershed or catchment area, is defined as a region where all the precipitation that falls will collect and flow to a common outlet, such as a river, lake, or ocean. It encompasses all the land where water from rain, melting snow, or ice can drain into a particular waterbody. This makes the second option correct, as it accurately describes the function of a drainage basin in collecting water from various sources, including streams and creeks.

Understanding drainage basins is essential for water resource management, environmental studies, and understanding hydrology, as they play a critical role in directing water flow and influencing local ecosystems. Knowing that a drainage basin collects water helps highlight its importance in managing water quality and quantity for surrounding areas.