AutoCAD Civil 3D - Stormwater

AutoCAD Civil 3D - Stormwater

Reply
Contributor
19 Posts
1 Kudo
Registered: ‎09-13-2011
Post 1 of 6
Accepted Solution

Shape Factor

273 Views, 5 Replies
09-13-2011 02:00 PM

Does anyone know which value of Shape Factor SSA uses? In my office, before I joined, Hydraflow was being used where Shape Factor was one of the input values. When I used SSA for my project, it didn't ask for Shape Factor value. So I am not sure if it assumes a particular value.

 

Thanks,

KD

Review Dimenionless Unit Hydrograph.  The Standard 484 is pretty typical, but there are other pre-defined values available

Employee
2,909 Posts
34 Kudos
Registered: ‎05-13-2005
Post 2 of 6

Re: Shape Factor

09-13-2011 03:40 PM in reply to: kdave

Review Dimenionless Unit Hydrograph.  The Standard 484 is pretty typical, but there are other pre-defined values available

Matthew Anderson, PE
Product Manager
Contributor
19 Posts
1 Kudo
Registered: ‎09-13-2011
Post 3 of 6

Re: Shape Factor

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

Thanks Matt..!

Member
4 Posts
0 Kudos
Registered: ‎06-27-2012
Post 4 of 6

Re: Shape Factor

06-27-2012 06:03 AM in reply to: Matt.Anderson

I am not able to find out which shape factor the program is using.  Where do you find that information?  Can it be changed/selected?

WaltBPE
Employee
2,909 Posts
34 Kudos
Registered: ‎05-13-2005
Post 5 of 6

Re: Shape Factor

06-28-2012 05:13 AM in reply to: kdave

Walter -

 

Change the Hydrology Engine to TR-20 and review the Dimensionless Unit Hydrograph. 484.png

 

The Standard 484 Shape factor is the SCS Unit Hydrograph. 

Matthew Anderson, PE
Product Manager
Member
4 Posts
0 Kudos
Registered: ‎06-27-2012
Post 6 of 6

Re: Shape Factor

06-28-2012 01:54 PM in reply to: Matt.Anderson

Thank you.

 

It would be nice if the shape factor input was placed with the rainfall selection criteria rather than by tself.

WaltBPE
Post to the Community

Have questions about Autodesk products? Ask the community.

New Post