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1 STORM SEWER DESIGN. 2 WHAT CAN HAPPEN MrOj5Ehttp://www.youtube.com/watch?v=tHWwv MrOj5E.

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Presentation on theme: "1 STORM SEWER DESIGN. 2 WHAT CAN HAPPEN MrOj5Ehttp://www.youtube.com/watch?v=tHWwv MrOj5E."— Presentation transcript:

1 1 STORM SEWER DESIGN

2 2 WHAT CAN HAPPEN MrOj5Ehttp://www.youtube.com/watch?v=tHWwv MrOj5E

3 3 HYDRAULIC DESIGN CHARTS –http://www.fhwa.dot.gov/engineering/hydraulic s/pubs/hds3.pdfhttp://www.fhwa.dot.gov/engineering/hydraulic s/pubs/hds3.pdf

4 4 INLET CAPACITY ent/Inlet%20Grate%20Capacities/w eir%20and%20orifice%20equation/d efault.aspxhttp://www.neenahfoundry.com/cont ent/Inlet%20Grate%20Capacities/w eir%20and%20orifice%20equation/d efault.aspx

5 5 SPREAD VS. ENCROACHMENT ual/04a-05.pdfhttp://www.iowadot.gov/design/dman ual/04a-05.pdf

6 6 EXAMPLE S x = 0.03 (cross-slope of gutter) n = (Manning’s “n” for PCC) Q = 1.6 cfs S L = 0.02 (longitudinal gutter slope) Z = 1/S x = 1/0.03 = Z/n = 33.33/0.016 = 2083

7 7 EXAMPLE Z/n = 2083 Connect to SL = 0.02 Turning line through Q = 1.6 to depth of 0.18 feet Spread “w” w = d * Z = 0.18 * w = 6 feet

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