CEE 350 - Korshin - Winter 2012 - Quiz 3(1)

CEE 350 - Korshin - Winter 2012 - Quiz 3(1) - Class CEE 350...

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Class CEE 350 Quiz #3 What is the difference between phreatic and confined aquifers? A phreatic aquifer is the same as an unconfined aquifer. That is, groundwater movement in the subsurface zone is limited by only underlying with low or non- existent hydraulic conductivity. A confined aquifer is sandwiched between two layers with very low or absent hydraulic conductivity (aquitards). The hydraulic conductivity of an aquifer is 10 m/day, and the local hydraulic gradient is 0.0005. The c ross sec t ion a rea o f the aqu i fe r described is 125 m 2 . Determine the Darcy velocity and the daily discharge in this aquifer. The specific discharge is defined by Darcy equation: ±² day m dx dh K q / 005 . 0 0005 . 0 10 ³ The daily discharge is the product of the cross-section and Darcy velocity: ±² ± ² ± ² day m m day m qA Q
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This note was uploaded on 03/31/2012 for the course CEE 350 taught by Professor Korshin during the Spring '10 term at University of Washington.

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CEE 350 - Korshin - Winter 2012 - Quiz 3(1) - Class CEE 350...

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