GEOLOGY

Detailed explanation-1: -A river drainage basin is an area drained by a river and all of its tributaries. A river basin is made up of many different watersheds. A watershed is a small version of a river basin. Every stream and tributary has its own watershed, which drains to a larger stream or wetland.

Detailed explanation-2: -A basin is a collection area that gathers water from upper areas of the watershed and delivers it to the watershed drainage river. A watershed can have many tributaries which feed into the main river.

Detailed explanation-3: -A watershed is an entire river system-an area drained by a river and its tributaries. It is sometimes called a drainage basin.

Detailed explanation-4: -Sources/Usage: Public Domain. A watershed is an area of land that drains all the streams and rainfall to a common outlet such as the outflow of a reservoir, mouth of a bay, or any point along a stream channel.