What is the runoff for the condition where C is 0.65, I is 5.7, and A is 3.25?

What is the runoff for the condition where C is 0.65, I is 5.7, and A is 3.25?

• A. 5.7 CFS
• B. 5.7 FPS
• C. 12.04 CFS
• D. 12.04 FPS

Answer: (C)

To determine the runoff using the provided values, it's essential to apply the Rational Method formula, which is given by: Runoff (Q) = C * I * A where: - C is the runoff coefficient (dimensionless), - I is the rainfall intensity (usually in inches per hour, but it can be in feet per second depending on the context), - A is the drainage area (in acres or other relevant units). In this case: - C = 0.65 represents the runoff coefficient, indicating that 65% of the precipitation will contribute to runoff, - I = 5.7 can be interpreted as the intensity of rainfall, which we need to ensure is converted correctly based on the context of the formula, - A = 3.25 represents the size of the area influencing the runoff. Assuming the intensity is in inches per hour for a standard application of the Rational Method, we first convert A to acres (if not already). If A is in acres, and I is converted to a consistent unit, plugging those values into the formula yields: Runoff = 0.65 * 5.7 * 3.25 Calculating this gives: Runoff = 0.65 * 5

To determine the runoff using the provided values, it's essential to apply the Rational Method formula, which is given by:

Runoff (Q) = C * I * A

where:

• C is the runoff coefficient (dimensionless),

• I is the rainfall intensity (usually in inches per hour, but it can be in feet per second depending on the context),

• A is the drainage area (in acres or other relevant units).

In this case:

• C = 0.65 represents the runoff coefficient, indicating that 65% of the precipitation will contribute to runoff,

• I = 5.7 can be interpreted as the intensity of rainfall, which we need to ensure is converted correctly based on the context of the formula,

• A = 3.25 represents the size of the area influencing the runoff.

Assuming the intensity is in inches per hour for a standard application of the Rational Method, we first convert A to acres (if not already). If A is in acres, and I is converted to a consistent unit, plugging those values into the formula yields:

Runoff = 0.65 * 5.7 * 3.25

Calculating this gives:

Runoff = 0.65 * 5