12d Model Forum Index 12d Model
Civil and Surveying Software
 
RegisterRegister   Log inLog in 

Kinematic Wave , Rational method

 
Post new topic   Reply to topic    12d Model Forum Index -> 12d Practice Version - General
View previous topic :: View next topic  
Author Message
ali v



Joined: 27 Aug 2016
Posts: 6

New South Wales, Australia

PostPosted: Mon 31 Oct, 2016 6:07 pm    Post subject: Kinematic Wave , Rational method Reply with quote

Hi ,
I want to use kinematic wave for my drainage analysis. I have figured out that 12d divides catchments into impervious and pervious parts and for previous part I have to assign C minor and major . I have already checked QUDM and AUSTroad manuals. These manuals provide C values for whole catchments( For example Qudm suggests using 0.9 for C10 in Central business areas). I was wondering if 12d use the C value to calculate runoff from the whole catchment or use it just for pervious part? If it uses these values for just the pervious part, what values do I have to use?
Back to top
View user's profile Send private message
Owen Thornton



Joined: 04 Oct 2005
Posts: 4011

Queensland, Australia

PostPosted: Mon 31 Oct, 2016 6:52 pm    Post subject: Reply with quote

If you don't wish to divide a catchment into impervious and pervious fractions (which is supported as a convenience), you can set the %Impervious to 0% or 100%. If you set it to 0%, you only use the pervious fraction and can set Cp=C values on an explicit/default basis. If you set it to 100%, you only use the impervious fraction and can set Ci=C values on a global basis only, which is less flexible.

(Many quoted C values have a percent impervious built into them.)
_________________
12d Solutions Pty Ltd
Back to top
View user's profile Send private message Send e-mail
ali v



Joined: 27 Aug 2016
Posts: 6

New South Wales, Australia

PostPosted: Thu 03 Nov, 2016 9:13 pm    Post subject: Reply with quote

Owen, thanks for your response and your training webinar on youtube.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    12d Model Forum Index -> 12d Practice Version - General All times are GMT + 11 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Contact the Forum Administrator
Powered by phpBB © 2001, 2005 phpBB Group