Option

Description

Level Tolerance

Determines the tolerance that will be allowed when comparing the incoming and outgoing link levels in each node.

Proportional Flow Depth

Determines the maximum flow depth that will be allowed in the links. Usually this will be set to 80%.

Peak Factor

Used in conjunction with the attenuation curve to calculate the attenuation at every node in the network.

Use attenuation curve

Calculate the peak flow using the attenuation curve. This is the same system used by earlier versions of Civil Designer.

Peak factor

Apply a peak factor without attenuation.

Infiltration

Percentage

Defines the percentage extra inflow due to stormwater infiltration. The calculated inflows are increased by this factor.

Pipe Length

Defines the extra inflow due to stormwater infiltration in litres per second per kilometre of sewer pipe.

Point Source Inflows

Apply peak factor

Select this checkbox to apply the peak factor to point source inflows.

Apply infiltration

Select this checkbox to also take the point source inflows into account when calculating stormwater infiltration.

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