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
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)
Grade 0.25% & flow 48l/s
Grade 0.25%(sag) & flow 107l/s
Grade 0.5% & flow 69.5l/s
Grade 2% & flow 32l/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
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)
Grade 12% & flow 67l/s
Grade 8% & flow 68.5l/s
Grade 4% & flow 70l/s
Inlet drawing details
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
