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Unformatted text preview: . Using gradually varied
theory, estimate the distance L upstream at which the water
depth will be 10 ft. What type of solution curve are we on?
What should be the water depth asymptotically far upstream?
Backwater curve 10 ft 15 ft slope of 0.15°. If the Vnotch weir has
30° and Y
50 cm, estimate, from gradually varied theory, the water
depth 100 m upstream.
P10.127 A horizontal gravelly earth channel 2 m wide contains a
fullwidth Crump weir (Fig. P10.122) 1 m high. If the
weir is not drowned, estimate, from gradually varied theory, the flow rate for which the water depth 100 m upstream will be 2 m.
P10.128 A rectangular channel 4 m wide is blocked by a broadcrested weir 2 m high, as in Fig. P10.128. The channel
is horizontal for 200 m upstream and then slopes at 0.7°
as shown. The flow rate is 12 m3/s, and n 0.03. Compute the water depth y at 300 m upstream from gradually
varied theory. L=? y ( x) P10.124
y? P10.125 The Tupperware dam on the Blackstone River is 12 ft
high, 100 ft wide, and sharpedged. It creates a backwater...
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 Spring '08
 Sakar

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