Catchment Area Given Peak Discharge For Nonstandard Effective Rainfall Calculator

Formula Used:

\[ A = \frac{Q_p \times t'_p}{2.78 \times C_r} \]

Area of Catchment (A):

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1. What is the Area of Catchment Formula?

The formula calculates the area of catchment based on peak discharge, modified basin lag, and regional constant. It provides an accurate assessment of the geographical area from which water flows into a particular point.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ A = \frac{Q_p \times t'_p}{2.78 \times C_r} \]

Where:

\( A \) — Area of Catchment (km²)
\( Q_p \) — Peak Discharge (m³/s)
\( t'_p \) — Modified Basin Lag (hours)
\( C_r \) — Regional Constant (-)

Explanation: The equation calculates the catchment area by relating peak discharge, basin lag time, and regional watershed characteristics.

3. Importance of Catchment Area Calculation

Details: Accurate catchment area calculation is crucial for hydrological modeling, flood prediction, water resource management, and infrastructure planning.

4. Using the Calculator

Tips: Enter peak discharge in m³/s, modified basin lag in hours, and regional constant. All values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is Peak Discharge?
A: Peak Discharge is the maximum volume flow rate passing a particular location during an event.

Q2: What is Modified Basin Lag?
A: Modified Basin Lag for an effective duration rainfall.

Q3: What is Regional Constant?
A: Regional Constant representing watershed slope and storage effect.

Q4: When is this formula typically used?
A: This formula is commonly used in hydrological engineering for nonstandard effective rainfall calculations and watershed analysis.

Q5: Are there limitations to this equation?
A: The accuracy depends on the proper determination of regional constants and may vary based on specific watershed characteristics.