Question

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Unit hydrograph theory is not applicable to catchment areas larger than 5000 sq.km.
Reason (R): Rainfall is not uniformly distributed on large catchment areas.
In the light of the above statements, choose the most appropriate answer from the options given below:

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

For catchments larger than 5000 sq.km, we typically divide the area into smaller sub-catchments, apply UH to each, and then route the flows through the channels to the main outlet.

Answer 1

The Correct Option is A