Cone of Depression
07/14/26
“How does a water table’s shape change when a pump is activated?”
Pumps can suck water out of aquifers. When a pump activates in an unconfined aquifer, it creates lower pressure near its mouth, causing the water table portion near the well to bend towards it. Because the water table portion further from the table is less affected, it will bend less, and a negative slope will form. Since the water table is affected equally in all directions, this slope will be circular and form what’s called a Cone of Depression. The slope of the cone of depression is contingent upon the pumping rate, pumping time, aquifer conductivity, and water recharge.
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