AutoCAD Civil 3D - Stormwater

AutoCAD Civil 3D - Stormwater

Reply
Active Contributor
clemk
Posts: 46
Registered: ‎11-13-2006
Message 1 of 3 (193 Views)

SSA 100-yr runoff coeff multiplier for rational

193 Views, 2 Replies
03-01-2012 08:38 AM

I have looked through help and SSA.  I am looking for where the multiplier for 100-year rational runoff coefficients may be applied.  Typically, for 25-yr return period, the C value should be multiplied by 1.1, for 50-yr multiplied by 1.2, for 100-yr, multiplied by 1.25.

 

Does SSA automatically do this or is there a setting somewhere to apply these multipliers?

 

Thanks!

 

Clem

Active Member
telson
Posts: 9
Registered: ‎05-20-2011
Message 2 of 3 (143 Views)

Re: SSA 100-yr runoff coeff multiplier for rational

03-26-2012 09:53 AM in reply to: clemk

We are in a similar situation where I am, our regulations have a table that gives a C value for a 5-year winter storm and both 100-year storm values based on the design C value. The only solution I have found is to have 4 different design files.

 

Not the answer I am sure you have been looking for but the only option as of right now.

Active Contributor
jmiller0621
Posts: 38
Registered: ‎05-18-2010
Message 3 of 3 (121 Views)

Re: SSA 100-yr runoff coeff multiplier for rational

03-28-2012 10:39 AM in reply to: clemk

I also have to do separate files.  It seems that it is something that could be incorporated into SSA relatively easily.  Maybe next year's version!

Announcements
Are you familiar with the Autodesk Expert Elites? The Expert Elite program is made up of customers that help other customers by sharing knowledge and exemplifying an engaging style of collaboration. To learn more, please visit our Expert Elite website.
Need installation help?

Start with some of our most frequented solutions or visit the Installation and Licensing Forum to get help installing your software.