Direction: A rectangular open channel needs to be designed to carry a flow of 2.0 m³/s under uniform flow conditions. The Manning's roughness coefficient is 0.018. The channel should be such that the flow depth is equal to half the width, and the Froude number is equal to 0.5. The bed slope of the channel to be provided is

Convert 55 mph to ft/sec, and then, to meters/sec. Show all work below.

23.10* A sewer pipe must be laid from a starting invert elevation of 78458ft at station 9+25 to an ending invert elevation 78248ft at station 12+75. Determine the uniform grade needed, and calculate invert elevations at each 50-ft station.

2- Fill out the following table and find the flow rate of the river and expain what is the reason of preparing this table for a river (20 p). What is the rating curve? (5 point) Station B с DEF 0.6D ||AW || G H 0.8D 0.2D I K L M 0.6D SETT32 i=1 Station Distance Across Stream(ft) Width (ft) Depth (ft) Velocity (ft/s) Area Discharge 0.2D 0.8D 0.6D (ft2) (cfs) A 0 0 0 0 0 B 15 1.1 0.43 0.28 0.35 UD C 28 2.6 0.61 0.46 0.55 39 3.5 1.54 1.39 1.45 ヨ 48 3.2 1.21 1.06 1.12 F 63 3.1 1.13 0.98 1.05 G 80 3.9 1.52 1.37 1.45 H 95 4.2 2.34 2.19 2.25 | 114 3.3 1.42 1.27 1.37 J 135 2.9 1.34 1.19 1.24 K 156 2.1 1.23 1.08 1.12 L 175 1.4 0.53 0.38 0.44 M 190 0 0 0 0

TRUE or FALSE On flow net diagrams, the flow lines are always perpendicular to an impermeable surface?