residual drawdown at a ratio of t'/t" = 1 if there is

(C-9)

normal recovery, as well as no recharge and no discon-

where As' = residual drawdown in feet per cycle of

tinuities in the aquifer within the zone of drawdown.

(log) t'/t" versus residual drawdown curve. Displace-

The ratio t'/t" approaches one as the length of the re-

ment of the residual drawdown versus (log) ratio t'/t"

covery period is extended.

(3) The transmissibility of the aquifer can be cal-

curve, as shown in figure C-18, indicates a variance

with the assumed conditions.

culated from the equation

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