Pipe Sediment Data
Water Quality
Pipe Sediment Data can be used to set sediment depth in pipes. Pipe Sediment Data overrides the Sediment Depth field in the conduit parameters.
Pipe Sediment Data defines:
- specific sediment depths for individual pipes
- a default sediment depth for any pipes for which a specific depth has not been defined
Pipe sediment data sets the depth of what is known as the passive layer of sediment in pipes. The passive layer is made up of permanent sediment, and the depth never changes during a simulation.
Using pipe sediment data lets you carry out several simulations with different depths of permanent sediment without having to make multiple versions of the network. This is very useful when doing water quality modelling. Changing the depth of the passive layer changes the hydraulic properties of the pipe and sets limits on the depth of the active sediment layer. The active layer is mobile sediment that can be eroded, transported and deposited during a water quality simulation.
See Sediment for more on sediment layers.
Because pipe sediment data is normally used for water quality modelling, it is only available when carrying out water quality simulations.
Editing Pipe Sediment Data
Pipe Sediment Data is edited on the Pipe Sediment Editor.
To open the Pipe Sediment Data, either right click on the item and choose Open from the popup menu, or drag the item onto the background of the InfoWorks Main Window.
The Pipe Sediment Data must contain one Global record that sets a default value for sediment depth. You can then have zero or more Link records, setting a specific value for individual links. See the Pipe Sediment Editor topic for more details.
Using Pipe Sediment Data in a Run
Pipe Sediment Data can only be used as part of a water quality run. On the Schedule Hydraulic Run Dialog:
- Check the Use QM check-box to set up a water quality simulation
- Include a Pipe Sediment Data item in the Pipe Sediment Data selection box.
See Water Quality Simulations for more on setting up runs.
