TUFLOW 1D Channels and Hydraulic Structures: Difference between revisions
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A scruffy dome is a type of dome inlet screen installed over a drop inlet, commonly used in stormwater systems. These inlets can be modelled in TUFLOW using a 1D Q type pit with a depth–discharge curve that reflects the hydraulic performance of the dome.
[https://www.ipwea-qnt.com/products-resources/qudm/ <u>QUDM</u>] recommends using the lesser of the weir flow or orifice flow equations to define inlet capacity (see Section 7.5.4). A blockage factor is also recommended to account for potential debris build-up during flood events (see Table 7.5.1 Provision for blockage at kerb inlets). This factor may vary depending on local guidelines, so regional standards should be consulted.
Once the rating curve is calculated, it can be added to the pit inlet database and linked to the Q type pit.
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A trash screen is a physical barrier, typically made from bars or mesh, placed at the inlet or outlet of a culvert, pipe, or channel to prevent debris from entering or exiting the structure.
Trash screens can be represented by applying additional head losses and blockage effects in accordance with
Possible use cases include:
* Where the screen is attached directly to the culvert inlet or outlet, the losses are applied to the culvert itself.
* Where the screen is located upstream of a culvert inlet or downstream of a culvert outlet, it can be modelled as a short zero length CF, IF, or RF channel before (upstream) or after (downstream) the culvert.
* In all cases, the net flow area should be reduced to account for the bars and any debris blockage, either by adjusting the flow area directly or by using the pBlockage attribute.
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