# Slotted Pipe Gutter Drain Inlet Equations Formulas Design Calculator

Solving for Manning's coefficient.
note: width of inlet > 1.75 inches

#### Inputs:

 pipe length for complete capture (LT) meterangstromattometercentimeterchaindekameterdecimeterexameterfemtometerfootgigameterhectometerinchkilometerlight yearlinkmegametermicrometermicronmilemillimeternanometerparsecpetameterpicometerrodterameteryard
 flow rate (Q) meter^3/secondcc/hourcentimeter^3/secondcentimeter^3/hourdeciliter/minutefoot^3/minutefoot^3/secondgallon/minuteliter/dayliter/minuteliter/secondmeter^3/daymeter^3/minutemilliliter/hourmilliliter/minute
 longitudinal slope (S)

#### Conversions:

 pipe length for complete capture (LT)= 0 = 0foot
 flow rate (Q)= 0 = 0foot^3/second
 longitudinal slope (S)= 0 = 0
 roadway cross slope (Sx)= 0 = 0

#### Solution:

 Manning's coefficient (n)= NOT CALCULATED

#### Other Units:

Change Equation
Select to solve for a different unknown
curb type gutter
 gutter flow rate Manning's coefficient roadway cross slope longitudinal slope flow width
curb opening inlet with weir operation

 capture flow rate or interception capacity curb opening length curb opening width flow depth at curb
curb opening inlet with weir operation
no depression

 capture flow rate or interception capacity curb opening length depth of flow
curb opening inlet with orifice operation
 capture flow rate or interception capacity curb opening area acceleration of gravity flow depth at curb opening height
gutter opening inlet
 capture flow rate or interception capacity grate perimeter flow depth
slotted pipe drain inlet
 pipe length for complete interception flow rate longitudinal slope Manning's coefficient roadway cross slope
gutter capture efficiency
 gutter capture efficiency capture flow rate total flow rate
gutter carryover or bypass
 gutter carry over or bypass total flow rate capture flow rate
Where
 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

Contact: aj@ajdesigner.com