Aquifers and Wells
Groundwater discharges from an aquifer near the surface supply an estimated flow between 50 and 100 cubic feet per second (1.4 and 2.8 m3/s) to the middle and upper sloughs. Rain infiltration and artificial sumps recharge this shallow aquifer. Geologists have identified four other major aquifers separated by relatively impermeable clays or other strata at various levels below the surface aquifer. The City of Portland's water bureau manages the Columbia South Shore Well Field that taps the deeper aquifers. As of 2004, 25 active wells drawing from depths ranging from 60 to 600 feet (18 to 180 m) could produce up to 100 million US gallons (380,000 m3) a day from the field. These were drilled between 1976 and 2003 to supplement the city's main water supply from the Bull Run Watershed during droughts or emergencies. The Rockwood Water People's Utility District (PUD) and the City of Fairview have also drilled three wells near the upper slough.
Read more about this topic: Columbia Slough, Hydrology
Other articles related to "aquifers":
... The following is a partial list of aquifers around the world ... A category-based list of aquifers is also available ...
... sand filled channel, with extensive alluvial aquifers in the river channel and below the alluvial plains ... Estimated water resources potential of these aquifers ranges between 175,000 m3 and 5.43 Mm3 in the channels and between 80,000 m3 and 6.92 Mm3 in the plains ... Currently, some of these aquifers are being used to provide water for domestic use, livestock watering and dip tanks, commercial irrigation and market gardening ...
... As these aquifers get drawn down by pumping, there is increasing interest in ways to speed up the recharging of these resources ...
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“Life is fountain of joy; but where the rabble also gather to drink, all wells are poisoned.”
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