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The effects of capillary fringe are on the slightly safer side and are neglected.

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in Irrigation Engineering by (75.2k points)
The effects of capillary fringe are on the slightly safer side and are neglected.

(a) True

(b) False

This question was posed to me by my school teacher while I was bunking the class.

This is a very interesting question from Design Criteria of Earth Dams in portion Earthen and Rock Fill Dams of Irrigation Engineering

1 Answer

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by (106k points)
The correct option is (a) True

Easy explanation: When there is appreciable flow through the dam body below the phreatic line, it reduces the effective weight of the soil and also the shear strength of the soil due to pore pressure. The capillary tension in water leads to increased intergranular pressure as the insignificant flow through the fringe leads to greater shear strength. Hence, the effects are neglected.

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