TUFLOW 2D Hydraulic Structures: Difference between revisions

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Form loss coefficients are an important input to the flow constriction layers. TUFLOW form loss coefficients can be derived from information in publications such as ''Hydraulics of Bridge Waterways'' ([httphttps://wwwciteseerx.ciccpist.espsu.edu/ImgWebviewdoc/Castilla%20y%20Leon/Documentaci%C3%B3n%20T%C3%A9cnica/Hydraulics%20of%20Bridge%20Waterways%20(1978)download?doi=10.1.1.386.8755&rep=rep1&type=pdf FHA, 1978] or [https://austroads.com.au/publications/bridges/agbt08 AUSTROADS, 2019]).
 
Backwater caused by piers in a bridge constriction is dependent on the ratio of the pier area relative to the gross area of the bridge opening, the type of piers (or piling in the case of pile bents) and the angularity of the piers with the direction of flood flow. The FHA (1978) guidance advises what form loss coefficient should be adopted based on these input parameters.