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Road Stormwater Drainage Inlets: Hydraulic Study

Inlet Type:
Double Bay (1900mm)

On-grade

Without deflectors

Capture Curves

Notes:

  • Double Bay (1900mm)
  • Without deflectors
  • Upstream transition: 1200mm
  • Downstream transition: 600mm
  • Inlet depression: 75mm
  • Barrier Kerb and channel: 300mm
  • Extended apron: 300mm

Curve Equations

   Q = aXb+cX+d

capture equations

Notes:

  • Double Bay (1900mm)
  • Without deflectors
  • Upstream transition: 1200mm
  • Downstream transition: 600mm
  • Inlet depression: 75mm
  • Barrier Kerb and channel: 300mm
  • Extended apron: 300mm

Pictures 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: 75mm
  • Barrier Kerb and channel: 300mm
  • Extended apron: 300mm

 

Curve Equations

  Q = aXb+cX+d

capture equation

Notes:

  • Double Bay (1900mm)
  • With deflectors
  • Upstream transition: 1200mm
  • Downstream transition: 600mm
  • Inlet depression: 75mm
  • Barrier Kerb and channel: 300mm
  • Extended apron: 300mm

Pictures & drawings of test

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

Sag

Capture Curve

Depth of Invert
- Sag test for 1900mm inlet opening
- Capture Curves
- City of Campbelltown

Notes:

  • Double Bay (1900mm)
  • Upstream transition: 1200mm
  • Downstream transition: 600mm
  • Inlet depression: 75mm
  • Barrier Kerb and channel: 300mm
  • Extended apron: 300mm