Curb Opening Inlet Orifice Equations Formulas Design Calculator
Problem:
Solve for height of opening.
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 | gutter flow rate |
 | Manning's coefficient |
 | roadway cross slope |
 | longitudinal slope |
 | flow width |
 | capture flow rate or interception capacity |
 | curb opening length |
 | curb opening width |
 | flow depth at curb |
no depression
 | capture flow rate or interception capacity |
 | curb opening length |
 | depth of flow |
 | capture flow rate or interception capacity |
 | curb opening area |
 | acceleration of gravity |
 | flow depth at curb |
 | opening height |
 | capture flow rate or interception capacity |
 | grate perimeter |
 | flow depth |
 | pipe length for complete interception |
 | flow rate |
 | longitudinal slope |
 | Manning's coefficient |
 | roadway cross slope |
 | gutter capture efficiency |
 | capture flow rate |
 | total flow rate |
 | gutter carry over or bypass |
 | total flow rate |
 | capture flow rate |
| Q | = | gutter flow rate |
| n | = | Manning's coefficient |
| Sx | = | roadway cross slope |
| S | = | longitudinal slope |
| T | = | flow width |
| d | = | flow depth at curb |
| a | = | depressing depth |
References - Books:
Martin Wanielista, Robert Kersten and Ron Eaglin. 1997. Hydrology Water Quantity and Quality Control. John Wiley & Sons. 2nd ed.
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By Jimmy Raymond
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