A 1 km long trapezoidal, concrete-lined (n = 0.013) channel is required to convey water at 10 m3 /sec. The channel bottom slope So is 0.001, and the side slope is 1V:2H. a. Using the best hydraulic section approach, design the channel dimensions (water depth; channel depth, channel bottom width, etc.). Calculate the flow velocity. Use the free-board at about 0.3 m. Sketch the section of your channel showing all dimensions including top width. b. If the cost of excavations is $20 per cubic meter, how much is the excavation cost for the 1 km channel. c. If the lining cost (concert lined) is $200 per square meter, how much is the lining cost of the channel.
A 1 km long trapezoidal, concrete-lined (n = 0.013) channel is required to convey water at 10 m3 /sec. The channel bottom slope So is 0.001, and the side slope is 1V:2H. a. Using the best hydraulic section approach, design the channel dimensions (water depth; channel depth, channel bottom width, etc.). Calculate the flow velocity. Use the free-board at about 0.3 m. Sketch the section of your channel showing all dimensions including top width. b. If the cost of excavations is $20 per cubic meter, how much is the excavation cost for the 1 km channel. c. If the lining cost (concert lined) is $200 per square meter, how much is the lining cost of the channel.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Q5. A 1 km long trapezoidal, concrete-lined (n = 0.013) channel is required to convey
water at 10 m3
/sec. The channel bottom slope So is 0.001, and the side slope is
1V:2H.
a. Using the best hydraulic section approach, design the channel dimensions
(water depth; channel depth, channel bottom width, etc.). Calculate the flow
velocity. Use the free-board at about 0.3 m. Sketch the section of your channel
showing all dimensions including top width.
b. If the cost of excavations is $20 per cubic meter, how much is the excavation
cost for the 1 km channel.
c. If the lining cost (concert lined) is $200 per square meter, how much is the
lining cost of the channel.
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