Aquifer & Pump Data
Demo:
Cooper-Jacob is valid for large time. Ignore the first few points.
Estimated Properties
Transmissivity (m²/day)
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Storativity
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Slope: m/log cycle
R²:
Cooper-Jacob Approximation:
Valid for small \( u = \frac{r^2 S}{4 T t} \) (typically \( u < 0.01 \)).
\( T = \frac{2.303 Q}{4 \pi \Delta s} \)
\( S = \frac{2.25 T t_0}{r^2} \)
Where \( \Delta s \) is drawdown per log cycle and \( t_0 \) is the time intercept.