Stormwater Runoff ची गणना कशी करावी
Stormwater Runoff म्हणजे काय?
Stormwater runoff volume is calculated using rainfall and surface area characteristics. It's essential for drainage system design.
सूत्र
Use rational method: Q = C×I×A where C is runoff coefficient, I is rainfall intensity, A is area
- Q
- C×I×A where C is runoff coefficient — C×I×A where C is runoff coefficient
- C
- C value — Variable used in the calculation
- I
- I value — Variable used in the calculation
- A
- A value — Variable used in the calculation
चरण-दर-चरण मार्गदर्शक
- 1Use rational method: Q = C×I×A where C is runoff coefficient, I is rainfall intensity, A is area
- 2C varies by surface: impervious (0.8-0.95), pervious (0.1-0.3)
- 3Results show peak flow for design storm
Worked Examples
इनपुट
Area 10 ha, 60% impervious, rainfall 100 mm/hr
परिणाम
Q ≈ 1.8 m³/s peak flow
For drainage system sizing
Common Mistakes to Avoid
- ✕Using wrong rainfall intensity for design frequency
- ✕Neglecting impervious surface increases from development
Frequently Asked Questions
Why use runoff coefficient?
Not all rain becomes runoff; some infiltrates soil. Coefficient captures this fraction.
What storm frequency should be designed for?
Typically 10-year storm for urban areas, 100-year for critical facilities, varies by code.
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