Examples
Examples
Try the starting example
- Pumping-test times (days)
- 0.01,0.1,1,10
- Observed drawdown (m)
- 0.5,1,1.5,2
- Constant pumping rate (m³/day)
- 100
- Observation radius (m)
- 10
- Cooper-Jacob transmissivity (m²/day)
- 36.64678
- Estimated storage coefficient
- 0.000825
- Drawdown slope per log10 time (m)
- 0.5
Try another scenario
- Pumping-test times (days)
- [1.01, 0.1, 1, 10]
- Observed drawdown (m)
- [0.5, 1, 1.5, 2]
- Constant pumping rate (m³/day)
- 100
- Observation radius (m)
- 10
- Cooper-Jacob transmissivity (m²/day)
- 36.766197
- Estimated storage coefficient
- 0.002574
- Drawdown slope per log10 time (m)
- 0.498376
Calculation method
Calculation method
Cooper-Jacob transmissivity (m²/day)
Cooper-Jacob late-time confined-aquifer straight-line approximation; user selects valid data window, T=2.303Q/(4πslope), S=2.25Tt0/r².
Estimated storage coefficient
Cooper-Jacob late-time confined-aquifer straight-line approximation; user selects valid data window, T=2.303Q/(4πslope), S=2.25Tt0/r².
Drawdown slope per log10 time (m)
Cooper-Jacob late-time confined-aquifer straight-line approximation; user selects valid data window, T=2.303Q/(4πslope), S=2.25Tt0/r².
Symbols and units
- a
- Pumping-test times (days)
- b
- Observed drawdown (m)
- c
- Constant pumping rate (m³/day)
- d
- Observation radius (m)
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; Cooper-Jacob late-time confined-aquifer straight-line approximation; user selects valid data window, T=2.303Q/(4πslope), S=2.25Tt0/r². 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.