TUFLOW 2D Hydraulic Structures: Difference between revisions
Content deleted Content added
No edit summary |
|||
Line 167:
</ol>
For larger bridges that spread across multiple cells, it is recommended to use a polygon layer, which selects all u and v faces falling within the polygon.
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.
*2d_bg: Note for bridges modelled using a 2d_bg polygon, the number of cells across the width of the bridge should be 4 or more.
[[File:2d_lfcsh_polygon.png|450px]] [[File:2d_bg_polygon.png|450px]]
| |||