EARTHSC 2WW3 Final: Exam Review Pt.2
14 Apr 2012
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Document Summary
Storing water in aquifer satisfies two needs: protects from surface pollution, and emergency water storage for droughts. Aquifer storage and recovery (asr) uses one well in which water is both injected and extracted. The advantage of this is that only one well is needed. Aquifer storage transfer and recovery (astr) uses two different wells, one well for storing the other for filtration and extraction. Artificially recharging the aquifer has many techniques, the best one depends on the aquifer itself. Things like characteristics of the aquifer and proximity to the water or the purpose for extracting the water. Infiltration basins are the oldest and most used method to recharge the aquifer, this is done by making the surface more permeable. This method is preferred when large open areas are available. When the area is not so open, the alternative method is to artificially pump water into the aquifers themselves. The auerenca-silves aquifer in portugal is using astr.
