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Road Stormwater Drainage Inlets: Hydraulic Study

Inlet Type:
Double Bay (1900mm)

On-grade

With deflectors

Capture Curves

Notes:

  • Double Bay (1900mm)
  • With deflectors
  • Upstream transition: 900mm
  • Downstream transition: 450mm
  • Inlet depression: 65mm
  • Barrier Kerb and channel: 300mm
  • Extended apron: 600mm 
  • Crossfall: 3%

Curve Equations

Q = aXb+cX+d

curve equations

Notes:

  • Double Bay opening (1900mm)
  • With deflectors
  • Upstream transition: 900mm
  • Downstream transition: 450mm
  • Inlet depression: 65mm
  • Barrier Kerb and channel: 300mm
  • Extended apron: 600mm 
  • Crossfall: 3%

Triple Bay (1900mm)

With deflectors

Capture Curves

Notes:

  • Triple Bay opening (1900mm)
  • With deflectors
  • Upstream transition: 900mm
  • Downstream transition: 450mm
  • Inlet depression: 65mm
  • Barrier Kerb and channel: 300mm
  • Extended apron: 600mm 
  • Crossfall: 3%

Curve Equations

Q = aXb+cX+d

capture equations

Notes: 

  • Triple Bay opening (2830mm)
  • With deflectors
  • Upstream transition: 900mm
  • Downstream transition: 450mm
  • Inlet depression: 65mm
  • Barrier Kerb and channel: 300mm
  • Extended apron: 600mm 
  • Crossfall: 3%

Pictures & drawings of test