+1 vote
in Irrigation Engineering by (75.2k points)
In order to prevent the possibility of the cross-flow towards the earthen embankments, it is necessary to provide _____________________

(a) counter berms

(b) sides walls of sufficient height and length

(c) spoil banks

(d) sufficient freeboard

I have been asked this question in final exam.

I'm obligated to ask this question of Failure of Earthen Dams topic in portion Earthen and Rock Fill Dams of Irrigation Engineering

1 Answer

0 votes
by (106k points)
Right answer is (b) sides walls of sufficient height and length

To elaborate: The cross-currents that may come from the spillway buckets is one of the reasons for the d/s toe erosion. To prevent the possibility of cross-flow towards the earthen embankment, sidewalls of the spillway also called diaphragm walls of sufficient height and length is provided.

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