GGU-SLUGTEST: Type curves after DOUGHERTY

In the DOUGHERTY model you must know the well and aquifer geometry, beside input of the previously mentioned parameters, or at least enter plausible estimates. You should have the following parameters ready:

• the aquifer thickness,

• the distance between the base of the aquifer and the base of the screen,

• the distance between the base and the top of the screen (length of screen).

These values must be respectively divided by the borehole radius.

The information corresponds to the information entered in the menu item "Edit/Test data". So you see, the type curves for an imperfect well after DOUGHERTY are precisely adapted to your respective system.

You then enter the start and end time (dimensionless type curve time) and the number of times per decade.

When you are ready to start the computation click "OK". The computation may take some time if you have a slow computer.

Once the computation is complete you can once again decide whether the type curve should be saved and/or placed in the list of available curves.