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METHODS OF DETERMINING PERMEABILITY, TRANSMISSIBILITY AND DRAWDOWN (1963)

Modifications on non equilibrium formula for drawdown measurements. If the Theis graphical method is used for determining the hydraulic constantsof an aquifer under water-table conditions, the observed drawdowns should becorrected for the decrease in saturated thickness.
Reference:
U. S. Geological Survey Water-Supply Paper 1536-I, p. 243-341
Organization:
USGS
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