Road Stormwater Drainage Inlets: Hydraulic Study
50 mm Lid, Central standard support (setback)
With & without deflectors
Capture Curves
Notes:
- Double Bay (1900mm)
- 50mm lid with central standard support (setback)
- Inlet with deflectors, if grade>=1%
- Upstream transition: 1200mm
- Downstream transition: 600mm
- Inlet depression: 85mm
- Barrier Kerb and channel: 300mm
- Crossfall: 3%
Curve Equations
Q = aXb+cX+d
Notes:
- Double Bay (1900mm)
- 50mm lid with central standard support (setback)
- Inlet with deflectors, if grade>=1%
- Upstream transition: 1200mm
- Downstream transition: 600mm
- Inlet depression: 85mm
- Barrier Kerb and channel: 300mm
- Crossfall: 3%
Sag
Double Bay (50mm lid)
Capture Curves
Notes:
- Double Bay (1900mm)
- 50mm lid with central standard support (setback)
- Without deflectors
- Upstream transition: 1200mm
- Inlet depression: 85mm
- Barrier Kerb and channel: 300mm
- Crossfall: 3%
Drawings of test
Inlet Type Double Bay (1900mm), ("Abrupt" Transition 1200mm):
Drawing details - With deflector
Without deflector
