Q. With reference to flash floods consider the following statements:
1.It occurs when heavy rainfall exceeds the ability of the ground to absorb it.
2.Dam or Levee breaks can cause the flash floods.
3.Densely populated areas have the lowest risk of flash floods.
Which of the statements given above are correct?

[A] 1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: A
Notes:

Explanation –

Statement 1 and 2 are correct. flash floods occurs when heavy rainfall exceeds the ability of the ground to absorb it. Dam or Levee breaks can cause the flash floods.

Statement 3 is incorrect. Densely populated areas are at a high risk for flash floods. The construction of buildings, highways, driveways, and parking lots increases runoff by reducing the amount of rain absorbed by the ground. This runoff increases the flash flood potential.

Source: The Hindu