A flood occurs in a main channel having a trapezoidal section (side slope on both sides: 2H to 1V) and base width of 12 m. The depth of flow in this section is 3.60 m and the flood spills out over an almost horizontal plane on one side of the main channel. The width of the flood plain is 60 m with an overflow depth of 1 m. If n = 0.025 for the main channel and two times as large for the overflow section, estimate the discharge if the slope for both is 0.00030.
A flood occurs in a main channel having a trapezoidal section (side slope on both sides: 2H to 1V) and base width of 12 m. The depth of flow in this section is 3.60 m and the flood spills out over an almost horizontal plane on one side of the main channel. The width of the flood plain is 60 m with an overflow depth of 1 m. If n = 0.025 for the main channel and two times as large for the overflow section, estimate the discharge if the slope for both is 0.00030.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A flood occurs in a main channel having a trapezoidal section (side slope on both
sides: 2H to 1V) and base width of 12 m. The depth of flow in this section is 3.60
m and the flood spills out over an almost horizontal plane on one side of the main
channel. The width of the flood plain is 60 m with an overflow depth of 1 m. If n
= 0.025 for the main channel and two times as large for the overflow section,
estimate the discharge if the slope for both is 0.00030.
Transcribed Image Text:Main channel, n = 0.025
2
3.6 m
√5
7.2 m 12 m
➜
2
5.2
2.6 m
Flood plane, n = 0.05
60 m
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