Simplified Sewerage

Network

Title

Population & Flow

Initial LCD (l/p/d)

Final LCD (l/p/d)

Return factor (%)

Peak flow factor

Pipe Sizes (mm, comma-separated)

Friction Formula

Manning

Colebrook-White

Escritt

Manning n

k_s (mm)

Pipe Sizing Method

Self-cleansing velocity only

Tractive tension only

Maximum of both

Min τ (Pa)

Min V_sc (m/s)

Cover & Depth

Minimum sewer cover (m)

Minimum Discharge

Apply minimum discharge

l/s

Minimum Diameter

Apply minimum diameter

Ground Slope Limiting

Limit minimum gradient to ground slope
(requires ground levels on junctions)

Sewers

Name	US Node	DS Node	Length (m)	Init Houses	Final Houses	HousePop Init	HousePop Final	Infilt Init (l/d/m)	Infilt Final (l/d/m)

Junctions / Nodes

Name	Ground Level (m)	X (m)	Y (m)

Calculated Results

Sewer	Length (m)	Q_i (l/s)	Q_f (l/s)	Grad V_sc (1:n)	Grad τ (1:n)	Design (1:n)	D calc (mm)	Pipe D (mm)	d/D_i	d/D_f	V_i (m/s)	V_f (m/s)
Click Calculate to run the analysis.

Cells highlighted amber indicate d/D > 0.80 (initial). Red indicates d/D > 0.95 (final).

Pipe Trench

Width allowance (m)

Bedding depth (m)

Concrete protection

Protection depth (m)

Junction Box

Width (m)

Breadth (m)

Base height (m)

Excav. allowance (m)

Actions

Resource Unit Costs Edit unit costs to match local conditions

Resource	Unit	Unit cost

Run hydraulic calculation first (click ▶ Calculate in the toolbar), then click ▶ Calculate Costs above.

Mode:

Pick

Draw

Show:

Sewers

Sewer labels

Junctions

Junction labels