EVR 1001 Lecture Notes - Lecture 9: Stormwater, Methylmercury, Safe Drinking Water Act
1 Nov 2016
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Document Summary
Most fresh water is locked in glaciers and ice. Groundwater makes up almost all of the remaining freshwater. Little water is found as liquid at the surface. Aquifers: a body of permeable rock underground that can contain or transmit groundwater. Unconfined aquifer: an aquifer that is simply porous rock covered by soil. Confined aquifer: an aquifer surrounded by a layer of impermeable rock or clay. Water table: the uppermost water level in an underground area where water fully saturates the rock or soil. Recharge: the input process of water percolating in to replenish an aquifer. Springs exists where water from an aquifer naturally percolates up to the surface. Tophat. com: unconfined aquifers are polluted more easily than confines aquifers; are recharged directly overhead from waters falling at the surface. Artesian wells are created when a well is drilled into a confined aquifer. Water flows spontaneously upwards, driven by the pressure created in water from the recharge area.
