Abstract:
A method that extends the Hvorslev solution for a 'Slug Test' to the case of a rapidly recovering
well in either, a confined, or unconfined, saturated aquifer is described. The procedure utilizes
an orifice to regulate the sand face flow and pressure regime, requiring the simultaneous
measurement of the standpipe and sand face pressures. The basics of the required equipment are
given with details of the analytical procedure. System capacitance is treated as 'Transportation
Lag', and the sand face pressure to flow relationship is determined throughout the test using the
concept of the 'Instantaneous Flow Derivative'. That the flow regime in a recovering well is not
always continuous is demonstrated, and four types of well response are identified. The result of
the hydraulic conductivity for a well obtained using the described, equipment, and analytical
procedure, is compared with that obtained using other recognized analytical procedures.
