A Computerized Technique for Estimating the Hydraulic Conductivity of Aquifers From Specific Capacity Data

Abstract

Abstract. Specific capacity data obtained from well construction reports can provide useful estimates of hydraulic conductivity (K). A simple computer program has been developed which can correct specific capacity data for partial penetration and well loss and, using an iterative technique, provide rapid estimates of K at hundreds of data points. The program allows easy data handling and is easily linked with existing statistical programs or contour mapping routines. The method was tested at two field sites in Wisconsin, one underlain by a sandy outwash aquifer, the other by fractured dolomite. In both areas, estimates of K from corrected specific capacity data agree reasonably well with data from pumping tests.

Application of Decision-Tree Model to Groundwater Productivity-Potential Mapping

“…In the study, the T was not used. Instead of the T, the SPC was used because of the limited number of the T data [1,12].…”

Analyses of the PM-2 Aquifer Test Using Multiple Observation Wells

“…This traditional technique was modified by McLin (2005b) from a procedure originally developed by Bradbury and Rothschild (1985). Specific capacity is defined here as discharge (Q) divided by drawdown or injection (s), and has units of gallons per minute per foot of drawdown.…”

Simulation of the regional groundwater-flow system of the Menominee Indian Reservation, Wisconsin

“…The pumping rates and measured drawdowns for wells Zoar 1 and Zoar 2 (Menominee Tribe of Wisconsin, Department of Environmental Services, written commun., 2001) were first used to calculate the specific capacity of the aquifer (table 1). The specific-capacity values are the basis for estimating hydraulic conductivity by means of the program TGUESS (Bradbury and Rothschild, 1985). The value of the aquifer storage coefficient is an input to the TGUESS program; a range of values (0.01 to 0.0001) was used to provide a range of estimated hydraulic conductivities.…”