After creating a sample line group with a new thalweg alignment, I exported from AutoCAD Civil 3D to HEC-RAS. The sample lines come in just fine but the thalweg of the single junctionless reach I’m trying to model is a long straight line. Has anybody else had this problem? I’ve used HEC-RAS a handful of times, but I’ve never had this happen. Thanks for any help!
Nevermind, I got it…I drew my poly-line from downstream to upstream but when I created my alignment from that poly-line, I chose the default direction which had reversed my alignment stationing so 0+00 was at the upstream extent. However, as you all know, it needs to be 0+00 at the downstream extent. Anyhow thanks anyway for looking!