User's guide of Proceessing Modflow 5.0

274 Processing Modflow
to estimate the horizontal hydraulic conductivity and storage coefficient of the leaky aquifer by
defining them as estimated parameters. Click Models < PEST < Run... or Models < UCODE
< Run... to see how the inverse models work. Because the analytical drawdown values were
used as the observations, the results from the inverse models must be horizontal hydraulic
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conductivity . 2.3 × 10 m/s and storage coefficient . 0.00075. If the vertical hydraulic
conductivity is unknown and needs to be estimated, we will need additional drawdown values
in the overlying aquifer during the pumping test.
Fig. 6.42 Drawdown-time curves
6.4.4 Transient Flow to a Well in a Leaky Confined Aquifer