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The inverted filter used in protection arrangement, protects the weir from what?

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in Irrigation Engineering by (75.2k points)
The inverted filter used in protection arrangement, protects the weir from what?

(a) Silting Action

(b) Scouring

(c) Piping

(d) Leakage Problems

I have been asked this question in a dream while sleeping

Question is from Design of Modern Weirs and Barrages topic in division Seepage Theories and Weirs and Barrages Design of Irrigation Engineering

1 Answer

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by (106k points)
Correct choice is (c) Piping

Easiest explanation: It helps in reducing the possibility of piping by allowing the flow of seepage water through it, without allowing the foundation soils to be lifted up. Therefore the filter consists of layers of materials of increasing permeability from bottom to top.

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