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: 900mm
• Downstream transition: 450mm
• Inlet depression: 65mm
• Barrier Kerb and channel: 300mm
• Extended apron: 600mm 
• Crossfall: 3%

Curve Equations

Q = aX^b+cX+d

Notes:

• Double Bay opening (1900mm)
• With deflectors
• Upstream transition: 900mm
• Downstream transition: 450mm
• Inlet depression: 65mm
• Barrier Kerb and channel: 300mm
• Extended apron: 600mm 
• Crossfall: 3%

Triple Bay (1900mm)

With deflectors

Capture Curves

Notes:

• Triple Bay opening (1900mm)
• With deflectors
• Upstream transition: 900mm
• Downstream transition: 450mm
• Inlet depression: 65mm
• Barrier Kerb and channel: 300mm
• Extended apron: 600mm 
• Crossfall: 3%

Curve Equations

Q = aX^b+cX+d

Notes: 

• Triple Bay opening (2830mm)
• With deflectors
• Upstream transition: 900mm
• Downstream transition: 450mm
• Inlet depression: 65mm
• Barrier Kerb and channel: 300mm
• Extended apron: 600mm 
• Crossfall: 3%