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sci.aquifer-transmissivity-Theis Calculator
Calculates aquifer transmissivity T = Kb from pumping test drawdown data using the Theis non-equilibrium equation and type-curve matching. Transmissivity represents the aquifer's capacity to transmit water — T = 0.01 m²/s is a productive aquifer; T < 0.0001 m²/s is a poor water supply source.
Inputs
Q L S
Amount per unit of time or per unit quantity. Check the denominator before interpreting.
S M
Reference formula or conversion factor shown for context.
U Well Function
Reference formula or conversion factor shown for context.
R M
Separation between two points or total path length. Check that units are consistent throughout the calculation.
T Hr
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
Results
transmissivity T (m²/s)
Sample size or count used in the calculation.
transmissivity T (m²/day)
Sample size or count used in the calculation.
storativity S estimate
The value at the specified point or condition.
T = Q·W(u)/(4πs)
Reference formula or conversion factor shown for context.
aquifer classification by T (m²/day)
Category assigned based on where the computed value falls on a defined scale. Check which standard or guideline defines these boundaries.
W(u) table
Reference formula or conversion factor shown for context.