City of Marion

Inlet Type
Double Bay (1900mm):

On-grade

With deflectors

Capture Curves

capture curves

Notes:

  • Double Bay (1900mm)
  • With Deflectors
  • Upstream transition: 1200mm
  • Downstream transition: 600mm
  • Inlet depression: 85mm
  • Barrier Kerb and channel: 300mm
  • Extended apron: 300mm
  • Crossfall: 3%

Curve Equations

   Q = aXb+cX+d

curve equations

Notes

  • Double Bay (1900mm)
  • Precast lintel lid
  • With Deflectors 
  • Upstream transition: 1000mm
  • Downstream transition: 600mm
  • Inlet depression: 75mm
  • Barrier Kerb and channel: 300mm
  • Extended apron Kerb: 300mm, 
  • Crossfall: 3%

Picture of tests

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

Grade 1% & flow 87l/s

Grade 1% & flow 87l/sGrade 1% & flow 87l/s

Grade 2% & flow 87l/s

Grade 2% & flow 87l/s

Grade 4% & flow 83l/s

Grade 4% & flow 83l/sGrade 4% & flow 83l/s

Grade 8% & flow 71l/s

Grade 8% & flow 71l/s

 Grade 12% & flow 175l/s

Grade 12% & flow 175l/s

Without deflectors

Capture Curves

capture curves

Notes:

  • Double Bay (1900mm)
  • Without Deflectors
  • Upstream transition: 1000mm
  • Downstream transition: 600mm
  • Inlet depression: 75mm
  • 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: 1000mm
  • Downstream transition: 600mm
  • Inlet depression: 75mm
  • Barrier Kerb and channel: 300mm
  • Extended apron Kerb: 300mm, 
  • Crossfall: 3%

Picture of tests

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

Grade 0.25% & flow 62l/s

Grade 0.25% & flow 62l/s

Grade 0.25% & flow 120l/s

Grade 0.25% & flow 120l/s

 Grade 0.25% & flow 175l/s

Grade 0.25% & flow 175l/s

Sag

Capture Curves

capture curves

Notes

  • Double Bay (1900mm)
  • Precast lintel lid
  • Without Deflectors 
  • Upstream transition: 1000mm
  • Inlet depression: 75mm
  • Barrier Kerb and channel: 300mm
  • Extended apron Kerb: 300mm, 
  • Crossfall: 3%

Pictures of test

33cm upstream spread and approach flow-136lps

33cm upstream spread and approach flow-136lps

21cm upstream spread and approach flow-109lps

21cm upstream spread and approach flow-109lps

Areas of study and research

+ Click to minimise