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y=2.44m, use the equivalent channel roughness formula when calculating Q

y=2.44m, use the equivalent channel roughness formula when calculating Q

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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y=2.44m, use the equivalent channel roughness formula when calculating Q
Calculate the discharge through the channel and the floodway (shown in the Figure below) for steady uniform flow, with S = 0.0009 n=0.025 12 m 5 m n=0.040 N [Σ1 Pint P 120 m WAR Side slopes 1:1 Use the following equivalent channel roughness formula due to Pavlovskii (1931)* ne =
Transcribed Image Text:Calculate the discharge through the channel and the floodway (shown in the Figure below) for steady uniform flow, with S = 0.0009 n=0.025 12 m 5 m n=0.040 N [Σ1 Pint P 120 m WAR Side slopes 1:1 Use the following equivalent channel roughness formula due to Pavlovskii (1931)* ne =
162 TABLE 5.6.1 Geometric functions for channel elements Section: Rectangle Area A Wetted perimeter P Hydraulic radius R Top width B 2 dR 1 dA + 3R dy A dy -B -Bw Bwy Bw + 2y Bwy Bw +2y Bw 5Bw+6y 3y(Bw +2y) 1 => +1 Trapezoid +B 11 y (Bw+zy)y Bw +2y √1+z² (Bw+zy)y Bw +2y √1+z² Bw +2zy (Bw +2zy)(5Bw+6y√1 +z²) +4zy² √₁+z² 3y(Bw+zy)(B+ 2y √1 + z²) Triangle zy2 2y √1+z² Z zy 2√1+z² 2zy 001ले 3y y W
Transcribed Image Text:162 TABLE 5.6.1 Geometric functions for channel elements Section: Rectangle Area A Wetted perimeter P Hydraulic radius R Top width B 2 dR 1 dA + 3R dy A dy -B -Bw Bwy Bw + 2y Bwy Bw +2y Bw 5Bw+6y 3y(Bw +2y) 1 => +1 Trapezoid +B 11 y (Bw+zy)y Bw +2y √1+z² (Bw+zy)y Bw +2y √1+z² Bw +2zy (Bw +2zy)(5Bw+6y√1 +z²) +4zy² √₁+z² 3y(Bw+zy)(B+ 2y √1 + z²) Triangle zy2 2y √1+z² Z zy 2√1+z² 2zy 001ले 3y y W
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