×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Rainfall Return Period

Rainfall Return Period

Rainfall Return Period

(OP)
Hi

for my dissertation I am trying to design a drainage system using epa swmm and measure its resilience under both standard and future climate change conditions. Now the Swmm applications manual lists a number of return periods such as a 1 in 100 year storm and has a list of the time and precipitation in inches. I am trying to find a U.K equivalent of this data. However it is proving difficult. Is there anyway to calculate or find such values for rainfall return periods in the U.K.


(below is 1 in 100 year rainfall data for a 2 hour storm)

0:00 1
0:05 1.14
0:10 1.33
0:15 2.23
0:20 2.84
0:25 5.49
0:30 9.95
0:35 4.12
0:40 2.48
0:45 1.46
0:50 1.22
0:55 1.06
1:00 1
1:05 0.95
1:10 0.91
1:15 0.87
1:20 0.84
1:25 0.81
1:30 0.78
1:35 0.75
1:40 0.73
1:45 0.71
1:50 0.69
1:55 0.67

Thank you

RE: Rainfall Return Period

Have you tried a local weather bureau? Or Google?

Peter Smart
HydroCAD Software
www.hydrocad.net

RE: Rainfall Return Period

(OP)
I have tried google but finding the exact information is difficult. Also couldn't find it on the Met Office website. I am trying to model runoff using EPA Swmm if that helps.

RE: Rainfall Return Period

It seems that determining the appropriate rainfall data would be an integral part of your dissertation. This is a non-trivial issue. Even the choice of a 2-hour storm duration is significant.

That said, I would expect UK stormwater regulations to provide guidance on the applicable rainfall data. Otherwise try a more targeted Google search such as "uk temporal rainfall distribution" or "uk idf curves", which can be used to generate temporal rainfall distributions.

Peter Smart
HydroCAD Software
www.hydrocad.net

RE: Rainfall Return Period

I searched Google for "uk hydrology manual" and found this: http://www.ceh.ac.uk/services/flood-estimation-han...

If that doesn't help, then try a local agency charged with storm drainage design.

==========
"Is it the only lesson of history that mankind is unteachable?"
--Winston S. Churchill

RE: Rainfall Return Period

suggest you call met directly

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

White Paper - Considerations for choosing a 3D printing technology
The adoption of 3D printing into major companies’ product development life cycles is a testament to the technology’s incredible benefits to consumers, designers, engineers and manufacturers. While traditional production methods have limitations in manufacturability, 3D printing provides unparalleled design freedom due to the additive method of building parts layer by layer. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close