Bridge Hydraulics (Mannings) Calculator tool

Bridge Hydraulic Calculator (Manning + Molesworth Afflux)

General Data

High Flood Level (HFL)

Bed Gradient (S)

Interpolation Interval (m)

Bridge Details

Bridge Length

Clear Waterway

Pier Width

Number of Piers

Hydraulic Design Parameters

Flow Source Calculate using Manning Enter Design Discharge

Design Discharge (Cumecs)

Afflux Formula Molesworth Yarnell (Future) Energy Method (Future)

Gravity (g)

Bridge Hydraulic Parameters

Existing Waterway Width (m)

Deck Soffit Level (RL)

Bridge Opening Height (m)

Upstream Water Level (Optional)

Automatically Calculated Bridge Parameters

Parameter	Value	Unit
Effective Waterway	0	m
Pier Obstruction Width	0	m
Obstruction Ratio	0	%
Bridge Opening Area	0	m²
Approach Flow Area	0	m²
Approach Velocity	0	m/s
Contraction Ratio	0	-

Afflux Result

Formula Used	-
Calculated Afflux	0.000 m
Head Loss	0.000 m

Survey Cross Section

Sr	Chainage	RL

Manning Compartments

Sr	Start	End	n

Calculation

Summary

Total Area0

Total Wetted Perimeter0

Hydraulic Radius0

Velocity0

Discharge0

Afflux0

Calculated Sections

Sr	Chainage	RL	ΔV	ΔH	Perimeter	Area	R	n	Velocity	Discharge

Cross Section Plot