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TUFLOW 1D Channels and Hydraulic Structures: Difference between revisions

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== Do calculations differ if I specify multiple culverts using the Number_of attribute, even if the total dimensions are the same as a single culvert? ==
Yes. This can slightly affect the modelling results.
Yes. This can affect the modelling results slightly. The main difference between a single wide culvert and multiple culverts with the same total width is the wetted perimeter of the two configurations. The multiple culverts scenario has slightly larger wetted perimeter due to the vertical walls between the culverts. This increases the friction in the downstream controlled regimes. Since the friction loss is usually small compared to the entry and exit losses, the difference in the calculated hydraulic behaviour is not expected to be significant. However, it's still important to model the arrangement that best reflects the physical structure, when assessing culvert performance.<br>▼
 
▲Yes. This can affect the modelling results slightly. The mainkey difference between a single wide culvert and multiple culverts with the same total width is the wetted perimeter of the two configurations. The multipleMultiple culverts scenariohave hasa slightly larger wetted perimeter due to the verticalinternal walls, between the culverts. Thiswhich increases the friction in the downstream -controlled regimes. Since theWhile friction losslosses isare usuallygenerally small compared to the entry and exit losses, the differenceimpact in the calculatedon hydraulic behaviour is notusually expected to be significantminor. However, it's still important to model the arrangement that best reflects the physical structure, when assessing culvert performance.<br>
 
However, it’s important to model the configuration that best represents the actual structure when assessing culvert performance.<br>
 
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