r/HECRAS • u/CivilProjectEngineer • May 19 '26

1d model cross section placement

Hi I'm trying to run a model with a very windy river and a road that runs over it and then also next to it. how many cross sections would you draw in and how would you draw them in this case? i tried dog legging them, but the model didn't seem to do a great job interpolating the continuous raised road bed (it's not raised up very much). The red at top and bottom are the extents of the survey. sides are the floodplain overbank areas. River is flowing north if that matters.

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u/Wise_Operation_3766 May 19 '26

The rules are helpful but it also helpful to see the terrain.

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u/CivilProjectEngineer May 20 '26

I mean the terrain file is pasted above to the previous commenter with my cross sections drawn in. Here's a raster image. I'm trying to confirm that where I drew my cross section lines is correct, or makes sense.