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Unformatted text preview: yc b2 300 m Top view Side view P10.109  v v P10.110 We assumed frictionless flow in solving the bump case,
Prob. 10.65, for which V2 1.21 m/s and y2 0.826 m
over the crest when hmax 15 cm, V1 1 m/s, and y1
1 m. However, if the bump is long and rough, friction may
be important. Repeat Prob. 10.65 for the same bump shape,
h 0.5hmax[1 cos (2 x/L)], to compute conditions (a)
at the crest and (b) at the end of the bump, x L. Let hmax
15 cm and L 100 m, and assume a cleanearth surface.
P10.111 Modify Prob. 10.110 as follows. Keep all other data the
same, and find the bump length L for which the flow first
becomes critical somewhere along the bump surface.
P10.112 The cleanearth channel in Fig. P10.112 is 6 m wide and
slopes at 0.3°. Water flows at 30 m3/s in the channel and
enters a reservoir so that the channel depth is 3 m just
before the entry. Assuming gradually varied flow, how
far is the distance L to a point in the channel where y
2 m? What type of curve is the water surface?  eText Main Menu  y1 y2 P...
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 Spring '08
 Sakar

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