Time of Drawdown in Unsteady Flow Formulas

Time of Drawdown is the total period for the difference between the pumping water level and the static (non-pumping) water level. And is denoted by t2. Time of Drawdown is usually measured using the Second for Time. Note that the value of Time of Drawdown is always positive.

Formulas to find Time of Drawdown in Unsteady Flow

fxTime at 2nd Instance since Pumping Started given DischargeGo

Unsteady Flow formulas that make use of Time of Drawdown

fxChange in Drawdown given Time at 1st and 2nd InstanceGo

fxTime at 1st Instance since Pumping Started given DischargeGo

List of variables in Unsteady Flow formulas

fx Time of Drawdown (t1) in Wells Go

fx Difference in Drawdowns Go

fx Discharge Go

fx Time in Seconds Go

FAQ

What is the Time of Drawdown?

Time of Drawdown is the total period for the difference between the pumping water level and the static (non-pumping) water level. Time of Drawdown is usually measured using the Second for Time. Note that the value of Time of Drawdown is always positive.

Can the Time of Drawdown be negative?

No, the Time of Drawdown, measured in Time cannot be negative.

What unit is used to measure Time of Drawdown?

Time of Drawdown is usually measured using the Second[s] for Time. Millisecond[s], Microsecond[s], Nanosecond[s] are the few other units in which Time of Drawdown can be measured.

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