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Q: Select the correct option for the given statements. Statement 1: Direction of the movement of a storm over the catchment area has a definite effect on the runoff. Statement 2: If the storm moves against the flow direction, then the base period will be comparatively more and less peak flow may be expected.
  • A. Both statement 1 and statement 2 are true, but statement 2 is not the correct explanation of statements1
  • B. Statement 1 is false and statement 2 is true
  • C. Statement 1 is true and statement 2 is false
  • D. Both statement 1 and statement 2 are true, and statement 2 is the correct explanation of statement 1.
Correct Answer: Option D - The runoff is clearly a function of precipitation, its intensity, its duration and its coverage. Direction of movement of a storm over the catchment area has a definite effect on the runoff. If the storm moves in the direction of the flow, the base period of hydrograph will be less and more peak flow may be expected. On the other hand, if the storm moves against the flow direction, then the base period will be comparatively more and less peak flow may be expected.
D. The runoff is clearly a function of precipitation, its intensity, its duration and its coverage. Direction of movement of a storm over the catchment area has a definite effect on the runoff. If the storm moves in the direction of the flow, the base period of hydrograph will be less and more peak flow may be expected. On the other hand, if the storm moves against the flow direction, then the base period will be comparatively more and less peak flow may be expected.

Explanations:

The runoff is clearly a function of precipitation, its intensity, its duration and its coverage. Direction of movement of a storm over the catchment area has a definite effect on the runoff. If the storm moves in the direction of the flow, the base period of hydrograph will be less and more peak flow may be expected. On the other hand, if the storm moves against the flow direction, then the base period will be comparatively more and less peak flow may be expected.