NC Division of Water Resources

Time Drawdown Analysis

Calculate transmissivity and storage coefficient using time and drawdown values from an aquifer test. Method can be used with transient flow conditions (Cooper-Jacob straight-line time-drawdown).

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#Time (minutes)Drawdown (feet)
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Other Parameters
Pumping Rate (gallons per minute)
Distance from Pumping Well (feet)

Upload file (time - drawdown, tab-delimited pairs with header record):