1. What is the Peak Discharge Formula?

The Peak Discharge formula calculates the maximum volume flow rate passing a particular location during an event using the Snyder method. It's commonly used in hydrology for flood prediction and watershed management.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q_p \) — Peak Discharge (m³/s)
• \( C_p \) — Regional Constant (Snyder), indicates retention and storage capacity
• \( A \) — Area of Catchment (km²)
• \( t'_p \) — Modified Basin Lag (hours)

Explanation: The formula calculates the maximum flow rate based on watershed characteristics and rainfall duration.

3. Importance of Peak Discharge Calculation

Details: Accurate peak discharge estimation is crucial for flood prediction, dam design, bridge construction, and urban drainage system planning.

4. Using the Calculator

Tips: Enter the regional constant, catchment area in km², and modified basin lag in hours. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the Regional Constant (Snyder)?
A: It's an empirical constant that represents the retention and storage capacity characteristics of the watershed.

Q2: How is Modified Basin Lag determined?
A: Modified basin lag is calculated based on watershed characteristics and rainfall duration, typically derived from hydrograph analysis.

Q3: What are typical values for the Regional Constant?
A: Values typically range from 0.4 to 0.8, depending on watershed characteristics and regional conditions.

Q4: When is this formula most applicable?
A: This formula is particularly useful for nonstandard effective rainfall events and small to medium-sized watersheds.

Q5: Are there limitations to this equation?
A: The formula may be less accurate for very large watersheds or in regions with significantly different hydrological characteristics.