= As shown in the sketch below, the expansion transition (n 0.015) from a rectangular concrete channel (n = 0.015) to a trapezoidal earth channel (n = 0.045) is 61.0 m (200 ft) long. The rectangular channel has a bottom width of 15.2 m (50 ft) and a slope of 0.0003 while the trapezoidal channel has a bottom width of 22.9m (75 ft), 4H:1V side slopes, and a longitudinal slope of 0.001. If the discharge in the channel is 283.3 cms (10,000 cfs), compute the water depth in each channel and the headloss in the transition based on the average friction slope and an expansion loss coefficient of 0.4. Compute the elevation of the invert of the trapezoidal channel at the end of the transition. 283.3 cms (10,000 cfs) Ca EGL 7 = 61 m 200' PLAN -El. = 91.46 m (300 ft) PROFILE 22.9 m 75' EGL TAYOS F
= As shown in the sketch below, the expansion transition (n 0.015) from a rectangular concrete channel (n = 0.015) to a trapezoidal earth channel (n = 0.045) is 61.0 m (200 ft) long. The rectangular channel has a bottom width of 15.2 m (50 ft) and a slope of 0.0003 while the trapezoidal channel has a bottom width of 22.9m (75 ft), 4H:1V side slopes, and a longitudinal slope of 0.001. If the discharge in the channel is 283.3 cms (10,000 cfs), compute the water depth in each channel and the headloss in the transition based on the average friction slope and an expansion loss coefficient of 0.4. Compute the elevation of the invert of the trapezoidal channel at the end of the transition. 283.3 cms (10,000 cfs) Ca EGL 7 = 61 m 200' PLAN -El. = 91.46 m (300 ft) PROFILE 22.9 m 75' EGL TAYOS F
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:As shown in the sketch below, the expansion transition (n =
0.015) from a rectangular concrete channel (n = 0.015) to a
trapezoidal earth channel (n = 0.045) is 61.0 m (200 ft) long.
The rectangular channel has a bottom width of 15.2 m (50 ft)
and a slope of 0.0003 while the trapezoidal channel has a bottom
width of 22.9m (75 ft), 4H:1V side slopes, and a longitudinal
slope of 0.001. If the discharge in the channel is 283.3 cms
(10,000 cfs), compute the water depth in each channel and the
headloss in the transition based on the average friction slope and
an expansion loss coefficient of 0.4. Compute the elevation of
the invert of the trapezoidal channel at the end of the transition.
283.3 cms
(10,000 cfs)
EGL
CANALI
7
=
50'
61 m
200
PLAN
El. = 91.46 m (300 ft)
PROFILE
22.9 m
75'
EGL
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