+1 vote
in Irrigation Engineering by (75.2k points)
The actual capacity of silt laiden water channel is worked out with 1/2 : 1 side slopes.

(a) True

(b) False

I have been asked this question in unit test.

Enquiry is from Cross-Section of an Irrigation Canal in portion Sediment Transport and Irrigation Channels Design of Irrigation Engineering

1 Answer

0 votes
by (106k points)
Right choice is (a) True

Easy explanation: Flatter slopes such as 1 : 1 and 1.5 : 1 are also constructed at the time of execution, but actual capacity of channel is worked out in 1/2 : 1 slope because even if we provide 1 : 1 or 1.5 : 1 slope the silt gets deposited on this slope and gives a new side slope 1/2 : 1. Therefore the actual capacity is calculated using 1/2 :  1 slope.

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