Slug test
In slug test a
small volume of water is poured to (or suddenly removed from) the
well after which the subsequent water level recovery to the initial
value is measured in the same well.
Available solutions
Cooper’s solution (confined
aquifer, fully penetrating well)
Picking’s solution
(confined aquifer, fully penetrating well, noninstantaneous change
of initial head)
BouwerRice’s solution
(unconfined aquifer, well of full or partial penetration)
Hvorslev’s solutions (a
set of solutions for confined and unconfined aquifers and different
wellbore constructions)
For slug test
analysis the following data should be entered into the editor: recovery log
(time and water level biuldup measurements), maximum drawdown (that
is initial jump of hydraulic head), pumping well radius. For
partially penetrating pumping well it is necessary to specify the
screen length and vertical distance from the middle of the screen
to the aquifer top or water level. If Picking’s solution is applied, time of
pumping/recovery should be specified.
References
Bouwer H. The Bouwer and
Rice slug test – an update // Ground Water. 1989. Vol. 27,
N 3. P. 304–309.
Bouwer H.,
Rice R.C. A slug test
for determining conductivity of unconfined aquifers with completely
or partially penetrating wells // Water Resources Research. 1976.
Vol. 12, N 3. P. 423–428.
Cooper H.H.,
Bredehoeft J.D.,
Papadopulos I.S. Response of a
finite diameter well to an instantaneous charge of water // Water
Resources Research. 1967. Vol. 3, N 1.
P. 263–269.
Hvorslev M.J. Time lag and
soil permeability in groundwater observations // U.S. Army Corps
Eng, Waterways Station. Vicksburg, MS. 1951. Bull. 36.
Picking L.W. Analyzing the
recovery of a finitediameter well after purging at an unknown rate
– A substitute for slugtesting // Ground Water. 1994.
Vol. 32, N 1. P. 91–95.
