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Strip aquifer: recharge boundaries

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Strip aquifer: recharge boundaries

Strip aquifer: recharge boundaries

 

Assumptions:

general assumptions for bounded (strip) aquifer;

image wells form an infinite row, signs of rates shown in figure below;

drawdown develops in three stages: unsteady-state, transitional (initial influence of the boundary) and steady-state.

 

Confined aquifer with parallel recharge boundaries.

a – cross-section; b – plan view.

 

Fundamental equation:

Laplace transform solution:

 

This solution is applicable to the following cases:

One well pumped at a constant rate

Pumping

Recovery

 drawdown is measured from the beginning of the pumping test

 drawdown is measured from the beginning of the recovery test

The whole test period including pumping /injection/ and recovery stages is analyzed

Several wells pumped at a constant rate

Pumping

One well pumped at a variable rate

Pumping

Several wells with time-variable pumping rates

Pumping