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GgOIJNDWATFIR FLOW WITHIN IIVR <br /> • Groundwater flow into lower well zone due to: <br /> pump, and <br /> air lift pump effect at the bottom of the well <br /> produced by rising air bubbles <br /> • • <br /> Water from stripper leaves well casing through upper <br /> screen <br /> • Water flow into lower screen = flow through upper screen <br /> • Air bubble-induced vibration results in compression and <br /> shear stresses which facilitate horizontal flow through the <br /> upper screen <br />