Examples
Examples
Try the starting example
- Catchment area (hectares)
- 10
- User-supplied runoff coefficient
- 0.7
- Selected rainfall intensity (mm/hour)
- 50
- Illustrative rational-method peak flow (m³/s)
- 0.972222
Try another scenario
- Catchment area (hectares)
- 11
- User-supplied runoff coefficient
- 0.7
- Selected rainfall intensity (mm/hour)
- 50
- Illustrative rational-method peak flow (m³/s)
- 1.069444
Calculation method
Calculation method
Illustrative rational-method peak flow (m³/s)
Rational Q=C×i(mm/hour)×A(hectares)/360; constant intensity and representative time of concentration assumed.
Symbols and units
- a
- Catchment area (hectares)
- b
- User-supplied runoff coefficient
- c
- Selected rainfall intensity (mm/hour)
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; Rational Q=C×i(mm/hour)×A(hectares)/360; constant intensity and representative time of concentration assumed. 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.
Further reading
Background reading; this does not imply endorsement or independent review of SumFizz.