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 critical parameter in hydrology and watershed management for predicting flood events and designing drainage systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T_p \) — Time of Peak (Hour)
• \( T_b \) — Base Length (Meter)

Explanation: This formula is derived from the SCS Triangular Unit Hydrograph method, which is widely used in watershed development activities, especially in small watersheds.

3. Importance of Time of Peak Calculation

Details: Accurate calculation of Time of Peak is crucial for flood forecasting, designing hydraulic structures, and managing water resources effectively. It helps in understanding the watershed response to rainfall events.

4. Using the Calculator

Tips: Enter the Base Length value in meters. The value must be greater than zero to get a valid result.

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of the constant 2.67 in the formula?
A: The constant 2.67 is derived from empirical studies and represents the ratio between Base Length and Time of Peak in the SCS Triangular Unit Hydrograph method.

Q2: Can this formula be used for all watershed sizes?
A: This formula is particularly suitable for small watersheds. For larger watersheds, more complex models may be required.

Q3: What units should be used for input values?
A: Base Length should be entered in meters, and the result will be in hours.

Q4: How accurate is this calculation method?
A: The SCS Triangular Unit Hydrograph method provides a good approximation for small watersheds but may have limitations in complex hydrological conditions.

Q5: Are there any limitations to this equation?
A: This method assumes a triangular shape for the unit hydrograph and may not accurately represent watersheds with unusual characteristics or extreme weather conditions.