Question

what are the reasons for flooding in the drainage basin​

Answer 1

Answer:

all rivers meet in the basins thus creating it a flood prone area

Answer 2

Answer:

Drainage: The term ‘drainage means the river system of an area. It is a system of flowing water from the higher level to the lower level.

Drainage Basin : Some small streams flowing from different directions come together to form the main river, which ultimately drains into a large water body such as a lake or a sea. The area drained by a single river system is called a drainage basin.