1. What is Time of Peak?

Time of Peak is the time interval from the start of rainfall to the peak discharge. It is a crucial parameter in hydrology for understanding watershed response to rain events.

2. How Does the Calculator Work?

The calculator uses the Time of Peak formula:

Where:

• Time of Concentration - Time interval for water to travel from the most remote point to the outlet
• Standard Duration of Effective Rainfall - Duration of rainfall that contributes to runoff

Explanation: The formula calculates the time from the start of rainfall to when the maximum discharge occurs in a watershed.

3. Importance of Time of Peak Calculation

Details: Accurate Time of Peak estimation is essential for flood forecasting, drainage system design, and watershed management. It helps predict when maximum flow will occur during a storm event.

4. Using the Calculator

Tips: Enter Time of Concentration and Standard Duration of Effective Rainfall in seconds. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is Time of Concentration?
A: Time of Concentration is the time required for water to travel from the most remote point in a watershed to the outlet.

Q2: How is Standard Duration of Effective Rainfall determined?
A: It is typically adopted based on regional standards and represents the duration of rainfall that effectively contributes to runoff.

Q3: Why is 0.6 used as a coefficient in the formula?
A: The 0.6 coefficient is an empirical factor that accounts for the relationship between time of concentration and time to peak discharge.

Q4: What are typical values for Time of Peak?
A: Time of Peak values vary significantly based on watershed characteristics, ranging from minutes for small urban areas to hours for large rural watersheds.

Q5: Are there limitations to this formula?
A: This formula provides an estimate and may need adjustment for specific watershed conditions, complex terrain, or unusual rainfall patterns.