SSC SSC JE Civil 2025 Mock Test Series (Paper 1 & Paper 2) Irrigation Engineering Dams and Spillways
The effective length (Le) of ogee spillway crest represented by equation, where L = the net clear length of the spillway crest, kp, = Pier contraction coefficient, ka = Abutment contraction coefficient, N = Number of piers, He = total design head on the crest including velocity head
1
Le = L - 2[kp · N + ka] He
2
Le = L - [kp · N + ka] He
3
Le = L - [kp + ka N] He
4
None of these