[hasansins]

I tried it once and then got back to hec ras as autodesk module was constantly freezing and crashing. Hec ras is easier to use than this module.

[hasansins]

Hard to tell where the problem is without seeing HMS model. But I am guessing your transform method does not reflect actual scenario. Try using kinematic wave transform and enter flow lengths and roughness’s more accurately. I use HMS too and so far its been accurate as long as I my transform inputs reflect reality.

[hasansins]

Hi Igor. You need to create sample lines and sample the surface of your channel. Only then you can export it to hec ras. As for selecting bank lines it is optional you dont have to define it to export geometry.

[hasansins]

Thank you for explanation.

[hasansins]

Is there a way to plot culvert in 2d areas with water surface elevation in it over time?

[hasansins]

Thanks. I imported it again from civil 3d with the work order you said and it worked good.

[hasansins]

All right for those who require this info I am writing the way I solved it. Actually it was pretty simple. Just type “mapexport” and click on polygons to select your closed polylines.

Important part is to fill “DATA” tab with at least one feature so you won’t get “this shp file contains 0 features” error in hec-ras.

The rest is same as other procedures,

-create manning n layer
-associate it with terrain

etc etc.

[hasansins]

Hi Con, First of all thanks for your reply. Can I do the same from a shapefile exported from Civil 3d? Can you also briefly explain how to associate mannings n with my shapefile and override my mesh with this new landcovers manning where the overlap is?

[hasansins]

Thank you very much!

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