TUFLOW 1D Channels and Hydraulic Structures: Difference between revisions

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== How can fishway baffles in a culvert be modelled? ==

 

Fishway baffles are barriers inside a culvert that slow the water and help fish swim through.

 

For both options, sensitivity testing is recommended because at low flows the way the culvert is defined can change the results. These methods do not include turbulence or detailed 3D water movement around the baffles. If accurate fish passage flows are required, a CFD 3D model can be used to determine the flows and those flows can then be applied using a 1D Q type channel.

 

== How can a flow splitter with a nib wall be modelled? ==

 

A flow splitter with a nib wall can be modelled by introducing a 1D weir between the manhole and the relevant outlet pipe. The weir crest elevation should be set equal to the height of the nib wall within the chamber. This setup allows low flows to discharge through one pipe, while higher flows overtop the weir into a secondary outlet, replicating the behaviour of a physical flow splitter.

 

Refer to the schematic example below for this configuration.

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