ANSDIMAT
provides analytical interpretation of aquifer tests for the
following hydrogeological conceptual schemes:
1. Confined aquifer
(fully
penetrating well)
2. Point source (partially
penetrating well)
3. Line source (partially
penetrating well)
4. Unconfined aquifer
5. Leaky aquifer
6. Twolayer aquifer
7. Multilayered system
8. Areally heterogeneous aquifer
with linear discontituity
9. Flow test analysis for a well near
the river
10. Sloping aquifer
11. Fractureporous
media
12. Constanthead test
13. Slug test
Most schemes
account for the role of lateral and profile
boundaries.
The following
types of aquifer tests could be analyzed and estimated for all
conceptual schemes (in case the necessary data is
available):
1) pumping
(either injection) test,
2) recovery
test:
2.1) drawdown is
counted off from the beginning of the test (from the initial
/static/ water level),
2.2) drawdown is
counted off from the beginning of the recovery (from the dynamic
water level at the moment when the pumping /injection/ is
finished),
2.3) recovery is
analyzed similarly to pumping at a constant rate: the drawdown
period is neglected,
3) analysis of
the whole test period including pumping /injection/ and recovery
stages (drawdown is counted off from the initial /static/ water
level).
The latter is an
analogue to interpretation of a pumping at a variable rate where
the last drawdown step
is zero.
Recovery is
considered in most details for confined aquifer (conceptual scheme
of the 1st type). For other conceptual schemes recovery
interpretation is made only by fitting parameters in solving direct
or inverse problem. For 2.1 for recovery calculation function
(f)
is:
and for 2.2 it
is:
For
example
