Import geometry from Autocad Civil 3D 2010 to HEC-RAS

[LucasI]

I want to import geometry from an Autocad Civil 3D 2010 file to HEC RAS, but I have some conditions.

My Autocad file has no surface, but it has points. Some of them belong to cross sections and others are in the alignment (Talweg), especially in curves. Therefore this points in talweg (the ones which do not correspond to cross sections) define the curves.

I have also 3D polylines that defines the alignment and the banks.

So, I want to export the geometry with these curves and not to have straight lines between cross sections, as the following figure (imageshack link) shows.

Thank you very much!

Figure:
http://imageshack.com/a/img540/9176/aDbBye.jpg

Autocad File:
https://drive.google.com/file/d/0B4HAkN9S1VnsSWR6ckRrTDhodzA/view?usp=sharing

[user]

I’m not familiar with AutoCad Civil3D , but you should be able to export your streamline and cross section as .geo file to be imported into Hec-Ras. There are several issues that cause your streamline to not be exported properly . Another workaround is to “redraw” your streamline either through Hec-Ras or external GIS programs.

[Author]

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