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Road Stormwater Drainage Inlets: Hydraulic Study

On-grade

Inlet Type
Double Bay (1900mm)

Without deflectors

Capture Curves

Notes:

  • Double Bay (1900mm)
  • Without deflectors
  • Upstream transition: 1200mm
  • Downstream transition: 600mm
  • Inlet depression: 50mm
  • Barrier Kerb and channel: 300mm
  • Extended  apron-300mm
  • Crossfall: 3%

Curve Equations

  Q = aXb+cX+d

curve equations

 Notes:

  • Double Bay (1900mm)
  • Without deflectors
  • Upstream transition: 1200mm
  • Downstream transition: 600mm
  • Inlet depression: 50mm
  • Barrier Kerb and channel: 300mm
  • Extended apron-300mm
  • Crossfall: 3%

Pictures & drawings of test

Longitudinal grade (%) with Approach flow (l/s)

With deflectors

Capture Curves

Notes:

  • Double Bay (1900mm)
  • With deflectors
  • Upstream transition: 1200mm
  • Downstream transition: 600mm
  • Inlet depression: 50mm
  • Barrier Kerb and channel: 300mm
  • Extended apron-300mm
  • Crossfall: 3%

Curve Equations

  Q = aXb+cX+d

curve equations

Notes:

  • Double Bay (1900mm)
  • With deflectors
  • Upstream transition: 1200mm
  • Downstream transition: 600mm
  • Inlet depression: 50mm
  • Barrier Kerb and channel: 300mm
  • Extended apron-300mm
  • Crossfall: 3%

Pictures & drawings of test

Sag

Double Bay

Capture Curve

Notes:

  • Double Bay (1900mm)
  • Without deflectors
  • Upstream transition: 1200mm
  • Downstream transition: 600mm
  • Inlet depression: 50mm
  • Barrier Kerb and channel: 300mm
  • Extended apron-300mm