Water from a main canal is siphoned to a branch canal over an embankment bymeans wrought iron pipes of 9 cm diameter. The length of pipe up to the summitis 25 m and the total length is 65 m. Water surface elevation in the branch canalis 10 m below that of the main canal(i) How many pipes are needed if the total quantity of water required to be conveyed is 60 litre/sec?(ii) What is the maximum permissible height of the summit above the water level in the main canal so that the water pressure of summit may not fall below 0.2 bar absolute, the barometer reading being 10 m of water?Entry loss may be assumed as one-half of the velocity head in the pipe and takefriction factor f= 0.0075.
​