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Vertical Uplift Gradient and Phreatic Surface

Vertical Uplift Gradient and Phreatic Surface

Vertical Uplift Gradient and Phreatic Surface

Typically, average vertical 'uplift' gradients are limited to about 0.5 near the landside toe of an embankment levee or dam; and where the
phreatic surface exits to the ground surface. What is the protocol for determining exit gradient if phreatic surface is buried; such that
it can be compared to limiting value of 0.5??

RE: Vertical Uplift Gradient and Phreatic Surface

If the phreatic surface is below the ground surface, then there is no uplift gradient.

Mike Lambert

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