Tuesday, November 6, 2018

HEC-RAS 5.0.6 has been released!

HEC has just released HEC-RAS Version 5.0.6.  This is primarily a bug fix version.  After you've downloaded the new version, make sure to give the release notes a read to see what bugs have been fixed.  See message below from the RAS Team.


All,

             We have released a new version of HEC-RAS today called version 5.0.6.  Please review the attached release notes to see all of the bugs that were fixed for this release.  We hope you enjoy the new version of the software.  As always, please keep us informed on any bugs you find, or your ideas for new features.  Here is the link to the HEC-RAS 5.0.6 download area of our webpage:

               
RAS Team



21 comments:

  1. Hi Chris,

    Thanks for sharing and sorry for asking a question that is irrelvent to the post.

    I want a raster file with extracted maximum flood depths of each cell of my 2D area using RAS mapper. I know I can do this in "Edit map parameter". But the problem is that I want to ignore the first few timesteps when extracting the maximum depths. Is there any direct way of doing this? I think I can do this by extracting RAS tiles for the selected time steps as a .db file and extracting the maximum from this file. But my knowledge in working with .db file is limited. I would appreciate if you suggest an alternative way.

    Thanks
    Mano

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    1. You might consider using a hot start /restart file to achieve this.

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  2. Is the web page working ? I Clicked the link, but it doesn't load. Any advice ?

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    1. Works for me. If the link doesn’t work for you, try going directly to the HEC website.

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  3. Hi Chris, I'm used to older version of HEC-Ras, in which, in the unsteady flow analysis there was the option "mixed flow". In the new version (but also in the 5.0.5) there is not. So, I am wondering why? Furthermore I read an old post where you described that the flow mixed regime is alway performed in unsteady simulation, wheter this option is turned on or not; is just a matter of better stability, is this right? And finaly, what about 2d simulation, there is an option like that or in a full 2d unsteady simulation the flow regime is always computed as mixed flow? Thanks in advance.

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    1. It's still there, just moved. Mixed flow option was moved to the Calculation Options and Tolerances window under its own tab called "1D Mixed Flow Options."

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  4. Hi Chris, one question not related to this post though. Do you have any idea if we can model a parshall flume with hecras? I am designing a weir and a parshall flume for a hydrometric station.... Thanks for your reply in advance

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    1. Yes you can! Just make sure you use lots of cross sections though.

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  5. Is the web page working ? I Clicked the link, but it doesn't load.I try going directly to the HEC website, but still cannot.How to download this version?

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  6. Hi Chris, I have been working on a dam breach study for a large river (MAD of 3,000 cms, peak dam breach outflow of 18,000 cms), and have been working on calibrating the model to a trusted WSE and flow relation. I've noticed that time step and mesh characteristics (spacing and orientation) have a much more significant impact (40% difference in depth) on the calibration results than adjusting Manning's n (~1% dif in depth). Are there general guidelines on creating the mesh, or other readings on the subject? I've already added bank and river center line break lines, my model is stable - my Courant number is approximately 0.5 in preliminary breach scenario runs. How can I be confidant that my mesh set up for the calibrations scenarios is also suitable for the breach scenarios given how sensitive the WSE is to the mesh and time step?

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    1. You want to make sure that you have at least 5 to 7 cells across primary conveyance paths for good approximation of velocity distribution. You also want to make sure your cells are small enough to make sure high ground features are captured on cell faces to prevent leaking and that you minimize fragmentation. Breaklines can help this significantly.

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  7. Hi Chris,
    I have a problem in extracting the maximum depth from RAS Mapper. Depth(max) created on the fly (generated for current view) is siginificanlty different from the Depth(max) raster saved to disk. Flood depths in the raster file saved to disk are significantly higher than max depths created for current view. I also noticed that the max depths generated for the current view are more likely values than the max depths in the stored map. Is ther any reason why they are different? I made sure that I use the same terrain map. Also, is ther a way to export the max depths created for current view to a raster file? Thanks in advance.

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    1. Not sure. There should be some differences in how values are displayed due to render mode options and borders will be slightly different, but you shouldn’t see significant differences. I haven’t found a way to export current view maps to A stored map. Other than creating an image of it.

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    2. The grid size used when exporting the raster will control how close the exported grid is to what is displayed within the mapper. Smaller the grid, the closer to the displayed results. Either way they won't be exactly the same as HEC-RAS uses a mesh rather than a structured grid.
      Though I haven't seen significant differences in outputs as you describe.

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    3. I doudle checked everything and I can't seem to find a reason for this behaviour. Would any of you be able to have a look at the results and help me figure out why this is happening? I can share the results (screenshots) by email. I would be grateful. Many thanks.

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  8. Please, help me... The Hec USACE home page is off?

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    1. HEC website is up and working just fine. Are you using any sort of VPN or other similar service that changes where the site thinks you are located?

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  9. Hi, and thank you for a fantastic blog!
    I am running a sediment transport analysis using unsteady flow. I can see from the release notes that there is a bug fix for the active layer function used by the Wilcock equation. The model runs perfectly fine in 5.0.5, but since there is a bug, I updated to 5.0.6 to see if there was any change in modelled sediment transport. However, when I am trying to run the model I get this error:

    HDF_ERROR trying to use HDF output file
    Subroutine HDF_OPEN_TIME

    Unsteady flow encountered an error.

    HDF5-DIAG: Error detected in HDF5 (1.8.11) thread 0:

    Error starting unsteady simulation - Stopping compute process

    The model runs perfectly fine without sediments...

    Do you have any tips?

    Thank you in advance!

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    1. Hmm. Wish I could help there. It sounds suspiciously like a bug. You might want to pass that along to HEC.

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  10. Hi, I have a problem with Rasmapper for HEC-Ras 5.0.5 and 5.0.6, it didn't open.
    How can solve the problem.

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