Profile Plot problem

[SilCil]

Hi everybody. I’m just a new user of the Hec-Ras software. I have been using it for simple modelings. But now the situation is different. I modeled a single river georeferenced with the help of with Geohecras. I imported the geometry and I tried to process the steady flow simulation. As a result I have a profile plot with a problem: the result profile is shifted from the ground line. I tryed to modify many things but it didn’t help.

Therefore I would like to ask for your help.

Thanks in advance.

Every comment is welcome!

Silvia

[Jake G]

Hi Silvia,

I’m sure you have fixed your model by now, but if not, a screenshot would help with understanding what issue you’re having.

If the issue is that the water surface profile is below the ground profile on the plot, that’s usually because the area bounded by channel bank stations doesn’t include the lowest portion of the cross section.

Thanks,
Jake G

[Anonymous]

Hi Silvia,

I had the same issue. I couldn’t find the answer online, so I’d like to share my answer. However, I had a bridge in my model, which you may not have since you didn’t mention one.

The bridge deck/roadway width (Geometric Data -> Bridge/Culvert -> Width) was overtaking one of my cross section. To test that this was the issue, I made the width narrower so that it wasn’t overlapping the cross section. I viewed the profile now and the ground level matched the bottom of water.

However, since your deck width should be left according to your design, the best way is probably to redraw you sample/section line that is overlapping so that it is farther away from the bridge. Might also be able to adjust the “Distance” box in the Deck/Roadway Editor.

Hope this helps.

[Author]

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