Question

The shape of falling limb of a hydrograph is dependent on __________.

• A. basin and storm characteristics
• B. storm characteristics only
• C. basin characteristics only
• D. direction of the rainfall only

Hint:

The falling limb of a hydrograph reflects how quickly runoff decreases, which depends on the basin's drainage capacity and the nature of the rainfall event.

Answer 1

The Correct Option is C

The shape of the falling limb of a hydrograph is influenced by both the characteristics of the basin (such as soil permeability, land use, etc.) and the storm characteristics (such as intensity, duration, and distribution of rainfall). The falling limb represents the recession phase of the hydrograph, where the runoff decreases as the basin drains. Both the basin's ability to absorb and release water and the intensity and distribution of the rainfall impact how quickly the water level drops, hence affecting the falling limb. Therefore, both basin and storm characteristics influence the falling limb shape. Thus, the correct answer is (A).