what is a phreatic line of an earth dam ?

soil mechanics

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  • top most seepage line
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  • The top flow line of a saturated soil mass below which seepage takes place, is called the Phreatic line. Hydrostatic pressure acts below the phreatic line whereas atmospheric pressure exists above the phreatic line. ... For an earthen dam, the phreatic line approximately assumes the shape of a parabola..
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