(Solved): please answer these 2 questions. 10. (a) What is a siphon spillway? Enumerate the two types ...

please answer these 2 questions.

10. (a) What is a siphon spillway? Enumerate the two types of saddle syphon spillways, and describe with a neat sketch the component parts and functioning of one of these two types : (b) A siphon spillway has the following cross-sectiôn at its throat : Height of the throat $$=1.5\mathrm{m}$$ Width of the throat $$=4\mathrm{m}$$. At thè design flow, the tail water elevation in $$7\mathrm{m}$$ below the summit of the siphon, and the heac water elevation is $$2\mathrm{m}$$ above the summit, (i) Taking a coefficient of discharge as $$0.6$$; determine the capacity of the syphon (ii) Determine the head that would be required on an ogee spillway $$3.8\mathrm{m}$$ long tc discharge this flow, if coefficient of discharge is $$2.25$$; (iii) What length of this ogee weir would be required to discharge the same flow with a head of $$2.2\mathrm{m}$$ on the crest. 12. Design a syphon aqueduct with the following data : For Canal Discharge Bed width F.S. depth R.I. of bed For Drainage High flood discharge $$=56$$ cumecs HFL $$=32\mathrm{m}$$ tevel of 10 a water $$=268.20\mathrm{m}$$ General bed level of $$10\mathrm{w}$$ water cross-section $$=265.50\mathrm{m}$$ General grounid level $$=267.20\mathrm{m}$$