Unsteady-state flow equations

Average drawdown in an observation well:

Drawdown in a piezometer (full solution):

Drawdown in a piezometer (reduced solution):

Steady-state flow equation:

Methods of analysis and parameters being estimated

f – function in square brackets;

1) for isotropic aquifer at steady state;

2) for isotropic aquifer parameters k and a are estimated;

3) for isotropic aquifer

the type curve being plotted by average drawdown equation, hydraulic conductivity is calculated as:

4) for isotropic aquifer; for anisotropic aquifer estimated parameters are