"Automatic
matching" dialog box
serves for aquifer parameter estimation by solving inverse problem
using less square method. The dialog box
is launched from the main menu "Analysis
> Inverse solution > Lesssquare method" or function
key F8.
"Automatic matching" dialog boxes.
Explanatory table
"Parameters"
tab


Settings for
parameters matching. matching is made with the assumed matching
step


"Initial
value" text
box

Initial
hydraulic diffusivity value

"Step
of matching" text
box

Initial step for
matching


"Leakage
factor" text
box

For leaky
aquifers only. Assumed value of leakage factor for parameters
matching

"Options"
tab

"Reduce
the step" text
box

Determines the
coefficient of matching step reduction if convergence is
achieved

"History"
tab


Fix the matched
values

"Start"
button


Switch to
parameters matching

matching
parameters is directly fulfilled in the following window
Window of automatching.
Explanatory table
"Continue"
button

Continue the
matching process with a new step (See "Reduce
the step" text
box

"End"
button

Return to
"Automatic
matching" dialog
box

The window
displays the process of matching, where:
a
 hydraulic
diffusivity current value for convergence search,
f
 the target
function value (zerocrossing point of the function is looked
for),
da
 time
step.
In consequence
of the matching process hydraulic diffusivity and transmissivity
values (or hydraulic conductivity) matched for the assumed step are
displayed in the window. After that the process can be either
terminated or restarted with a new (reduced) matching step. Do not
take too small matching steps.
If convergence
cannot be achieved, push ESC button to exit. Possible ways to
achieve convergence:
1)
change the
starting parameters for matching,
2)
remove incorrect
measurements (see data
viewing) or
measurements that are obviously beyond do not fit in the chosen
scheme,
3)
choose other
conceptual scheme.
If the
convergence is achieved, but solving direct problem (see
parameters
matching) with matched
parameters gives resulting calculated drawdown values dramatically
different from the observation ones, same steps are
advisable.
