A road bridge is proposed to be constructed across an alluvial stream with the estimated design discharge as 2500 m^3/s. It is decided to adopt a total effective waterway equal to 300 m for this bridge as against the regime width of 237.5 m due to afflux considerations. If the HFL at the site is at RL 214 m, then the RL of the open foundation can be suggested as _______
(a) 206.6 m
(b) 208.5 m
(c) 207.2 m
(d) 210.2 m
This question was addressed to me in an interview.
This intriguing question comes from Culverts Construction in chapter Culverts and Small Road Bridges Construction of Irrigation Engineering