Week 3 notes

# Week 3 notes - IntroToManning Manningequation A =...

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Intro To Manning Manning equation: P = wetted perimeter, ft (water in contact with walls) R = hydraulic radius, ft R = A/P S = slope of the energy grade line, ft/ft n = Manning roughness coefficient Rectangular Channel (in developer when adding breaks use F8 to run) y: deptch in the channel w: width of the channel A = yw P = 2y+w (Q equation) 1.49       (A25*\$B\$22) ^(2/3) ^(1/2) ------ *(A25*\$B\$22)* ---------------------------- *(\$B\$21) \$B\$20 (2*A25+\$B\$22))^(2/3)) n 0.01 s 0.01 w (ft) 10 Single Step y (ft) A (ft^2) P (ft) R (ft) Q (ft^3)/s Q (ft^3)/s 0 0 10 0.0000 0.00 0.00 0.5 5 11 0.4545 36.70 36.70 1 10 12 0.8333 109.96 109.96 1.5 15 13 1.1538 204.89 204.89 2 20 14 1.4286 314.99 314.99 2.5 25 15 1.6667 436.36 436.36 3 30 16 1.8750 566.41 566.41 3.5 35 17 2.0588 703.32 703.32 4 40 18 2.2222 845.78 845.78 4.5 45 19 2.3684 992.79 992.79 5 50 20 2.5000 1143.58 1143.58 5.5 55 21 2.6190 1297.57 1297.57 6 60 22 2.7273 1454.26 1454.26 6.5 65 23 2.8261 1613.28

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## This note was uploaded on 09/05/2011 for the course ENG CIV 160 taught by Professor Staff during the Spring '11 term at Iowa State.

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Week 3 notes - IntroToManning Manningequation A =...

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