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Stone pitching or riprap is generally provided to avoid _______________

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in Irrigation Engineering by (75.2k points)
Stone pitching or riprap is generally provided to avoid _______________

(a) over-topping

(b) erosion of U/s and d/s face

(c) cracking due to frost action

(d) gully formation

I got this question in an online quiz.

Asked question is from Failure of Earthen Dams topic in portion Earthen and Rock Fill Dams of Irrigation Engineering

1 Answer

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by (106k points)
Right option is (b) erosion of U/s and d/s face

Easy explanation: The waves developed near the top surface due to the winds notch out the soil from the U/s face and the D/s toe of the dam may get eroded due to the cross currents and due to tailwater. Stone pitching or riprap should be provided to avoid such failures.

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