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Calculate the length of upstream talus if the length of the downstream loose stone talus is 20 m.

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+1 vote
in Irrigation Engineering by (75.2k points)
Calculate the length of upstream talus if the length of the downstream loose stone talus is 20 m.

(a) 20 m

(b) 10 m

(c) 40 m

(d) 15 m

I had been asked this question in semester exam.

This intriguing question originated from Seepage Theories topic in chapter Seepage Theories and Weirs and Barrages Design of Irrigation Engineering

1 Answer

0 votes
by (106k points)
The correct answer is (b) 10 m

To explain I would say: For designing the proper weir portion, the length of upstream talus (L4) is kept equal to half the length of D/s talus.

Given the length of loose D/s talus = 20 m

The length of upstream talus = 20/2 = 10 m.

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