×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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!

*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

HMR 52 Probable Maximum storm
2

HMR 52 Probable Maximum storm

HMR 52 Probable Maximum storm

(OP)
I am trying to use HMR 52 to get the probable maximum frequency, but I am very unfamiliar with the program, if anyone has any user manual for it or ideas on another program to use please let me know. Does the NFF Program from USGS give you a rainfall frequency or is there a module within HEC HMS that achieves the same results. I am trying to find a program that will also calculate a dam breach, as of right now i am using DOS based Dambrk or Breach

Thanks,
Jared
jrall@larsondesigngroup.com

RE: HMR 52 Probable Maximum storm

The NFF ( National Flood Frequency) program will calculate the Probable Maximum Flood ( PMF ), not Frequency. I believe HEC-RAS now includes the simplified dam break program.  Both are free.

I don't know about HMS.

good luck

RE: HMR 52 Probable Maximum storm

With all your dam talk I assume you want the Probable Maximum Precipitation event.  Just read your local HMR.  It is very straight forward.

HMS has a break module just like RAS.  I really think you need to look into your dam.  While RAS has always given me good results there are a lot of empirical methods out there that are really the defensible way to analyze a dam.  The RAS seems a little voodoo to me that it works so well.  Also you have to look at your dam and the downstream channel to get a guess.  My favorite hydrograph method is to figure out just how bad I think it will be. I call this Peak at time 20 minutes or so and I draw a triangle with the breaching reservoir volume under it.  If I just barely miss a house or something I consider adding some more water.  I use an HP calculator.  I like to run a few models.

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

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. 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