4.11. An inflow hydrograph is given for a

reservoir that has a weir-spilway outflow

structure. The flow through the spillway is

governed by the equation

Q=3.75Ly³/2 (cfs),

where is the length of the weir andy is

the height of the water above the spilway

crest. The storage in the reservoir is

by

governed

S = 300y (ac-ft).

Using At=12 hr, L-15 ft,

and SoQ0, route the info

ydrograph through the reserving

the storage indication method./n12

24

30

48

60

72

84

96

108

120

132

144

158

Time

(hr)

Using At 12 hr, L15 ft,

=

and SgQ=0, route the infor

hydrograph through the server wing

the storage indication method.

40

35

37

125

340

675

722

740

673

458

250

140

10

Inflow

(cfs)