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: 1200mm
- Downstream transition: 600mm
- Inlet depression: 85mm
- Barrier Kerb and channel: 300mm
- Extended apron: 300mm
- Crossfall: 3%
Curve Equations
Q = aXb+cX+d
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%
Pictures of test
Longitudinal grade (%) with Approach flow (l/s)
Grade 1% & flow 87l/s
Grade 2% & flow 87l/s
Grade 4% & flow 83l/s
Grade 8% & flow 71l/s
Grade 12% & flow 175l/s
Without deflectors
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
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%
Pictures of test
Grade 0.25% & flow 62l/s
Grade 0.25% & flow 120l/s
Grade 0.25% & flow 175l/s
Sag
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%
