Examples
Examples
Try the starting example
- Roof catchment area (m²)
- 150
- User-selected first-flush depth (mm)
- 1
- Effective collection fraction (fraction)
- 0.9
- First-flush diversion volume (litres)
- 135
Try another scenario
- Roof catchment area (m²)
- 151
- User-selected first-flush depth (mm)
- 1
- Effective collection fraction (fraction)
- 0.9
- First-flush diversion volume (litres)
- 135.9
Calculation method
Calculation method
First-flush diversion volume (litres)
One millimetre over one square metre equals one litre; multiply by supplied collection fraction.
Symbols and units
- a
- Roof catchment area (m²)
- b
- User-selected first-flush depth (mm)
- c
- Effective collection fraction (fraction)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- User-supplied measurements and assumptions; One millimetre over one square metre equals one litre; multiply by supplied collection fraction. Supported limits: Finite numeric values bounded to 1e9 magnitude; lists and tables contain 1–100 records unless a stricter bound is stated. Inputs use the units shown. Lists explicitly paired by a method must have matching lengths; independent polynomial coefficient vectors may differ. Respect stated physical, interpolation, policy and computational domain limits.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.