Unsteady-state flow equation

1. Solution for the aquifer of variable thickness

2. Solution for sloping unconfined nonleaky aquifer

3. Solution for sloping unconfined leaking aquifer

Methods of analysis and parameters being estimated

For leaking aquifer leackage factor is additionally estimated; for aquifer with variable thickness storage coefficient (S) is estimated instead of hydraulic diffusivity (a).

Additional parameter preset for sloping aquifer is the slope value, for wedge-shaped aquifer – aquifer thickness value near the observation well.

Drawdown depends not only from the distance to the observation well, but also from the distance L'p (see figure) to horizontal line on which the pumping well is situated. This distance is defined in the table "Well", column "Boundary"