AutoCAD Civil 3D - Stormwater

AutoCAD Civil 3D - Stormwater

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Distinguished Contributor
RickCarle-PE
Posts: 128
Registered: ‎09-28-2007
Message 1 of 10 (2,624 Views)
Accepted Solution

HEC-RAS Junctions

2624 Views, 9 Replies
05-27-2011 11:39 AM

I'm new to HEC-RAS and trying to use Civil 3D to create my HEC-RAS data.  Thanks to this deiscussion board I think I'm just about there (especially regarding my cross sections and stationing).  The issue I'm having is that when I import the data, HEC-RAS does not create junctions at the intersection of my rivers and reaches.  Basically, I have two rivers with the Main River having two reaches:

 

1. Main River (upper)

2. Main River (lower)

3. Tributary

 

Main Creek (upper) intersects Main Creek (lower) where the Tributary intersects Main Creek.  Thus, I should have one junction.  When I click on the junction button in HEC-RAS, it says not junctions exist.

 

 

 

once you have the three reaches imported in RAS, zoom in really close to the Y junction area, in HEC-RAS geometry editor, go EDIT>MOVE OBJECT, little blue grips will appear. grab the little blue grip at the end of main river upper reach and move over to the start blue grip of main river lower reach. RAS will prompt you to create a junction and name it. repeat for the tributary. let us know how it goes.

Valued Mentor
Hidden_Brain
Posts: 712
Registered: ‎03-24-2009
Message 2 of 10 (2,620 Views)

Re: HEC-RAS Junctions

05-27-2011 02:29 PM in reply to: RickCarle-PE

once you have the three reaches imported in RAS, zoom in really close to the Y junction area, in HEC-RAS geometry editor, go EDIT>MOVE OBJECT, little blue grips will appear. grab the little blue grip at the end of main river upper reach and move over to the start blue grip of main river lower reach. RAS will prompt you to create a junction and name it. repeat for the tributary. let us know how it goes.

Avishek Chhibber, P.E., CFM
Civil 3D 2014 SP2, Win 7-64 bit
8GB RAM
Distinguished Contributor
RickCarle-PE
Posts: 128
Registered: ‎09-28-2007
Message 3 of 10 (2,587 Views)

Re: HEC-RAS Junctions

05-31-2011 02:09 PM in reply to: Hidden_Brain

That worked.  Thanks.

Valued Mentor
Hidden_Brain
Posts: 712
Registered: ‎03-24-2009
Message 4 of 10 (2,583 Views)

Re: HEC-RAS Junctions

05-31-2011 05:34 PM in reply to: RickCarle-PE

yay!! my first kudos, that too in hydraulic modeling topic! thanks!!

glad i could help.:smileyhappy:

Avishek Chhibber, P.E., CFM
Civil 3D 2014 SP2, Win 7-64 bit
8GB RAM
Employee
Matt.Anderson
Posts: 2,909
Registered: ‎05-13-2005
Message 5 of 10 (2,527 Views)

Re: HEC-RAS Junctions

06-09-2011 06:47 AM in reply to: Hidden_Brain

Have you tried Project River Analysis?

Matthew Anderson, PE
Product Manager
Distinguished Contributor
RickCarle-PE
Posts: 128
Registered: ‎09-28-2007
Message 6 of 10 (2,524 Views)

Re: HEC-RAS Junctions

06-09-2011 07:14 AM in reply to: Matt.Anderson

No.  I don't know much about that yet.  I used HEC-RAS becasue of familiarity of the software with our office drainage folks (QC purposes) and with our client.  It's for a public client so it makes it tough some times to try use software that they may not know or be comfortable with yet. 

 

With that being said, what's your thoughts on the river software vs HEC-RAS?

Employee
Matt.Anderson
Posts: 2,909
Registered: ‎05-13-2005
Message 7 of 10 (2,522 Views)

Re: HEC-RAS Junctions

06-09-2011 07:25 AM in reply to: RickCarle-PE

Project River Analysis is a HEC-RAS interface within AutoCAD Civil 3D.   It provides an interface of using the AutoCAD Civil 3D surface for cutting cross-sections, performing the HEC-RAS analysis and then mapping the floodplain limits.

 

The analysis can be exported to HEC-RAS, the output reports are HEC-RAS.

 

Matthew Anderson, PE
Product Manager
Distinguished Contributor
RickCarle-PE
Posts: 128
Registered: ‎09-28-2007
Message 8 of 10 (2,520 Views)

Re: HEC-RAS Junctions

06-09-2011 07:52 AM in reply to: Matt.Anderson

Thanks Matt.  That sounds like the way I should have gone.  I'll look into that next time.

Valued Mentor
Hidden_Brain
Posts: 712
Registered: ‎03-24-2009
Message 9 of 10 (2,512 Views)

Re: HEC-RAS Junctions

06-09-2011 07:14 PM in reply to: Matt.Anderson

hey Matt, so this project river analysis ultimately creates a .geo file for RAS import, or can i run HEC-RAS inside a Civil 3D session? if it is the first, i can currently do the same with the free ras extension, and am curious to see what extra the river analysis provides. if it is the latter, that would be sweeettt..

Avishek Chhibber, P.E., CFM
Civil 3D 2014 SP2, Win 7-64 bit
8GB RAM
Employee
Matt.Anderson
Posts: 2,909
Registered: ‎05-13-2005
Message 10 of 10 (2,509 Views)

Re: HEC-RAS Junctions

06-09-2011 07:48 PM in reply to: Hidden_Brain
Project River Analysis is an Autodesk Labs extension that performs the later!
Matthew Anderson, PE
Product Manager
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