For the drainage system shown in Fig. P16.19, determine the design flow for each sewer sec- tion by the rational method.

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For The Drainage System Shown In Fig P16 19 Determine The Design Flow For Each Sewer Sec Tion By The Rational Method 1 (731.76 KiB) Viewed 38 times

For the drainage system shown in Fig. P16.19, determine the design flow for each sewer sec- tion by the rational method. The rainfall intensity (in./hr) is represented by i = 100/(t + 15); tis in minutes. Flow from each area is shown by an arrow. Average velocity through the pipes = 4 ft/sec. Unit A Area (acres) 0.4 0.5 0.3 Overland flow time (min) 10 10 B C D С 0.7 0.7 0.80 0.80 0.65 0.60 0.60 5 5 0.3 0.4 E 10 F 0.5 10 G 0.6 10 Feet 500 Pipe Lengths 1-3 2- 3 3- 5 4-5 5-6 Slope 0.008 0.01 0.0075 1500 600 0.01 750 600 0.0075 Figure P16.19 D B 20 E G 5 06