Intensity of Rainfall When Peak Discharge Is Considered Calculator

Formula Used:

\[ i = \frac{Q_p}{C_r \times A_D} \]

Intensity of Rainfall (i):

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1. What is Intensity of Rainfall When Peak Discharge Is Considered?

Intensity of Rainfall When Peak Discharge Is Considered is a hydrological parameter that represents the rate of rainfall when accounting for the maximum volume flow rate passing a particular location during a storm event. It is calculated using peak discharge, runoff coefficient, and drainage area.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ i = \frac{Q_p}{C_r \times A_D} \]

Where:

\( i \) — Intensity of Rainfall (m/s)
\( Q_p \) — Peak Discharge (m³/s)
\( C_r \) — Runoff Coefficient (dimensionless)
\( A_D \) — Drainage Area (m²)

Explanation: This formula calculates rainfall intensity by dividing the peak discharge by the product of runoff coefficient and drainage area.

3. Importance of Rainfall Intensity Calculation

Details: Accurate rainfall intensity calculation is crucial for hydrological modeling, stormwater management system design, flood prediction, and urban drainage planning.

4. Using the Calculator

Tips: Enter peak discharge in m³/s, runoff coefficient (0-1), and drainage area in m². All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the typical range for runoff coefficient?
A: Runoff coefficient typically ranges from 0.1 (pervious surfaces) to 0.95 (impervious surfaces like concrete).

Q2: How is peak discharge determined?
A: Peak discharge is typically calculated using hydrological models or measured at stream gauging stations during storm events.

Q3: What factors affect rainfall intensity?
A: Climate patterns, storm duration, geographical location, and seasonal variations all affect rainfall intensity.

Q4: Why is drainage area important in this calculation?
A: Drainage area determines the total surface area contributing to runoff, directly affecting the volume of water reaching the discharge point.

Q5: What are the limitations of this formula?
A: This formula assumes uniform rainfall distribution and may not account for complex terrain, soil saturation levels, or temporal variations in rainfall intensity.