Question:

In civil engineering, the rational method is commonly used for estimating peak stormwater runoff rates. Which of the following statements regarding the rational method is true?

A$)$ The rational method assumes that the peak runoff rate is directly proportional to the intensity of rainfall, the area draining to the point of interest, and the time of concentration.

B$)$ The rational method is suitable for estimating peak runoff rates for large watersheds but is not applicable for small urban catchments.

C$)$ The rational method neglects the effect of antecedent moisture conditions on runoff generation, making it less accurate for regions with variable rainfall patterns.

D$)$ The rational method incorporates detailed soil infiltration characteristics into its calculations, allowing for precise estimation of peak runoff rates under various soil conditions