Irrigation Structures I-(11-2).pdf - 2 Design of Syphon A navigable canal crosses a drain through a steel pipe syphon the cross sections of the canal

# Irrigation Structures I-(11-2).pdf - 2 Design of Syphon A...

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2 A navigable canal crosses a drain through a steel pipe syphon, the cross sections of the canal and drain are shown in below figure, and the following data are available : The heading up is not to exceed 20 cm Canal discharge = 24 m 3 /s Drain discharge = 18 m 3 /s Minimum submersion = 1.0 m Number of barrels = 4 For screen loss, k esc = 0.1 For friction loss, k f = 0.2 Required : Check the heading up and fix the dimensions of the barrels Design empirically the different elements of the syphon Give detailed sketches for the following : Plan half earth removed, and sec. elevation Design of Syphon
3 Design of syphon Hydraulic design 2 ( ) (12 2.5) 2.5 36.25 A b d d m = + = + = 1 8 0 .5 / 3 6 .2 5 Q V m s A = = = 0 .8 / 2 / S y m s V m s 2 3 S y V V V 0 .8 / 1 .5 / S y m s V m s 1 .5 / S y A ssu m e V m s = 2 1 8 1 2 1 .5 S y S y Q a m V = = = 2 4 S y d a n = 2 1 2 4 1 .9 6 2 4 d d m m = = Design of Syphon