Q. Consider the following statements:
1.The boundary line separating one drainage basin from the other is known as the catchment area.
2.An area drained by a river and its tributaries is called a drainage basin.
Which of the statements given above is/are correct?

[A] 1 only

[B] 2 only

[C] Both 1 and 2

[D] Neither 1 nor 2

Answer: B
Notes:

Explanation: A river drains the water collected from a specific area, which is called its ‘catchment area’.

  • An area drained by a river and its tributaries is called a drainage basin.
  • The boundary line separating one drainage basin from the other is known as the watershed.
  • The catchments of large rivers are called river basins while those of small rivulets and rills are often referred to as watersheds.
  • There is, however, a slight difference between a river basin and a watershed.
  • The watersheds are small in area while the basins cover larger areas.

Source: NCERT – Fundamental of Physical Geography