TUFLOW 2D Hydraulic Structures: Difference between revisions
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Caution should be taken when specifying the FLC values for the two different 2d bridge features:
*2d_lfcsh: FLC attribute is the total loss '''per unit length''' (meters or feet) in the direction of flow. The FLC is applied to each face as 'FLC * cell size'
*2d_bg: FLC attribute is still the '''total form loss'''. Instead of converting it to "form loss per meter", the "Deck_Width" attribute is used to automatically distribute the total FLC to the selected faces, i.e. FLC<sub>face</sub> = FLC / Deck_Width * cell size. <!-- SG This is temporarily commented out because it's related to a rotation bug with FLC calculation: For bridges modelled using a 2d_bg polygon the relative ratio of the bridge width to the 2D cell size should be 4 or greater. For more information on this see <u>[https://downloads.tuflow.com/Other/2d_bg_R_Bridge_Configuration_Advice_202503.pdf 2d_bg_R_Bridge_Configuration_Advice.pdf]</u>. -->
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