Thanks for this video, very helpful. I am having a similar issue with a model i created. It's a rectangular spillway in which the water drops down feeding directly into a large culvert. The stability after the water drops from the spillway and into the culvert spikes and causes a the model to work incorrectly. Any help/recommendations for this issue would be greatly appreciated!
Every time I tried to add the Cumulative Iterations layer to a model run I get the following error - "Offset and length were out of bounds for the array or count is greater than the number of elements from index to the end of the source collection." Any idea what that means or how to fix it? Thanks, these videos have been very helpful!
Thanks for this great video. I am using HEC-RAS 6.1.0 and when I follow the step I don't see the options under "additional 2D variables" Instead I see cumulative excess depth, infiltration depth and precipitation depth. and the second question is that let's say we found the problematic locations "cells". Then what approaches we can take to fix them. Thanks
This feature is only available in versions 6.2 and later. So you will see it if you update to the latest version. As for how to deal with problematic cells, that is a much bigger topic. In this case I improved it by changing my base time step and adaptive time step parameters - but there are many reasons cells can iterate. I'll try to eventually push out a few videos that cover a couple of these at a time.
@stanford so if I generate a Max WSEL error Raster and it shows multiple errors across the domain, BUT I achieved an overall acceptable continuity error AND flow and stage are stable through structures, than I shouldn't go in and consider for example lowering the time step and so forth?
That is really a matter of risk tolerance. Is the model performing well enough to answer the question you are trying to answer? I go to work with models that hit max iterations all the time if the errors don't diverge into instabilities. But I'll be more careful with a model that is iterating and check the offending cells pretty often to make sure they aren't propagating instabilities.
@@basmaawad9892 WSEL Error is not necessarily a sign of model instability, you have to understand the process of your watershed to fully determine if your numerical representation of it is incorrect
@civilenggggg l represent a 100 km reach of meadering canal its max width 60 m the mesh is 30* 30 in the canal refinement region and 200 at the rest of mesh. I also simulate sediment and the model is unstable when I enter the boundary condition of lateral flow as internal BC at the canal. How can I fix the problem?
Hello Sir, Good Morning. Dear Respected Sir, I have a query. Sir, Can be we do 2D Sediment transport modeling in hec ras with considering a bridge in a river flow path? Sir, I am eagerly waiting for your positive response. Thank You
We have not done any work on sediment through bridges. So if it works, it is incidental. This model is passing sediment through this structure. But it has open air gates, so it is really just a weir with drops in it. I was planning to test a bridge next, but bridges will probably require some work and testing to perform well with 2D sediment.
hello, someone knows about this error? HDF5-DIAG: Error detected in HDF5 (1.10.6) thread 10344: #000: D:\build\HDF5\1.10.6\hdf5-1.10.6\src\H5F.c line 444 in H5Fcreate(): unable to create file major: File accessibilty minor: Unable to open file #001: D:\build\HDF5\1.10.6\hdf5-1.10.6\src\H5Fint.c line 1509 in H5F_open(): unable to open file: time = Fri Jul 26 13:34:22 2024 , name = 'C:\Users\Jonathan Proaño\AppData\Local\Temp\76d7fabd-71ac-4f5e-b4e4-097452e2a832.h5', tent_flags = 13 major: File accessibilty minor: Unable to open file #002: D:\build\HDF5\1.10.6\hdf5-1.10.6\src\H5FD.c line 734 in H5FD_open(): open failed major: Virtual File Layer minor: Unable to initialize object #003: D:\build\HDF5\1.10.6\hdf5-1.10.6\src\H5FDsec2.c line 346 in H5FD_sec2_open(): unable to open file: name = 'C:\Users\Jonathan Proaño\AppData\Local\Temp\76d7fabd-71ac-4f5e-b4e4-097452e2a832.h5', errno = 2, error message = 'No such file or directory', flags = 13, o_flags = 302 major: File accessibilty minor: Unable to open file
If you get an error like that, it is a bug. Even if it is user error, we should provide more informative error messages. You can send a bug report and a link to your modle to the RAS inbox for this one.
Thank you Dr Stan for this kind of videos. They are very helpful to improve our modeling skills
Thank you for sharing this with us Dr. Gibson. I also happen to need this.
This is amazing Dr. Gibson 👍
Very helpful
Awesome Stan. Thanks for sharing this!
Epic addition. Thanks for the video. Keep them coming.
Thanks Stan, good work!
Keep up the good work!
Thanks for valuable videos
Thanks for this video, very helpful. I am having a similar issue with a model i created. It's a rectangular spillway in which the water drops down feeding directly into a large culvert. The stability after the water drops from the spillway and into the culvert spikes and causes a the model to work incorrectly. Any help/recommendations for this issue would be greatly appreciated!
Every time I tried to add the Cumulative Iterations layer to a model run I get the following error - "Offset and length were out of bounds for the array or count is greater than the number of elements from index to the end of the source collection."
Any idea what that means or how to fix it? Thanks, these videos have been very helpful!
Thanks for this great video. I am using HEC-RAS 6.1.0 and when I follow the step I don't see the options under "additional 2D variables" Instead I see cumulative excess depth, infiltration depth and precipitation depth. and the second question is that let's say we found the problematic locations "cells". Then what approaches we can take to fix them. Thanks
This feature is only available in versions 6.2 and later. So you will see it if you update to the latest version. As for how to deal with problematic cells, that is a much bigger topic. In this case I improved it by changing my base time step and adaptive time step parameters - but there are many reasons cells can iterate. I'll try to eventually push out a few videos that cover a couple of these at a time.
So Stan, how are you solving your iterations at the gates? : )
...um, that will have to be a future video. :)
The question I wanted to ask.
@stanford so if I generate a Max WSEL error Raster and it shows multiple errors across the domain, BUT I achieved an overall acceptable continuity error AND flow and stage are stable through structures, than I shouldn't go in and consider for example lowering the time step and so forth?
That is really a matter of risk tolerance. Is the model performing well enough to answer the question you are trying to answer? I go to work with models that hit max iterations all the time if the errors don't diverge into instabilities. But I'll be more careful with a model that is iterating and check the offending cells pretty often to make sure they aren't propagating instabilities.
Thank you I appreciate your response!@@stanfordgibson
How to fix WSEL error
@@basmaawad9892 WSEL Error is not necessarily a sign of model instability, you have to understand the process of your watershed to fully determine if your numerical representation of it is incorrect
@civilenggggg l represent a 100 km reach of meadering canal its max width 60 m the mesh is 30* 30 in the canal refinement region and 200 at the rest of mesh. I also simulate sediment and the model is unstable when I enter the boundary condition of lateral flow as internal BC at the canal. How can I fix the problem?
Hello Sir, Good Morning. Dear Respected Sir, I have a query. Sir, Can be we do 2D Sediment transport modeling in hec ras with considering a bridge in a river flow path? Sir, I am eagerly waiting for your positive response. Thank You
We have not done any work on sediment through bridges. So if it works, it is incidental. This model is passing sediment through this structure. But it has open air gates, so it is really just a weir with drops in it. I was planning to test a bridge next, but bridges will probably require some work and testing to perform well with 2D sediment.
@@stanfordgibson actually Sir, my professor assigned me to do this work but i don't have any idea how to do? That's why I asked from you Sir.
hello, someone knows about this error? HDF5-DIAG: Error detected in HDF5 (1.10.6) thread 10344:
#000: D:\build\HDF5\1.10.6\hdf5-1.10.6\src\H5F.c line 444 in H5Fcreate(): unable to create file
major: File accessibilty
minor: Unable to open file
#001: D:\build\HDF5\1.10.6\hdf5-1.10.6\src\H5Fint.c line 1509 in H5F_open(): unable to open file: time = Fri Jul 26 13:34:22 2024
, name = 'C:\Users\Jonathan Proaño\AppData\Local\Temp\76d7fabd-71ac-4f5e-b4e4-097452e2a832.h5', tent_flags = 13
major: File accessibilty
minor: Unable to open file
#002: D:\build\HDF5\1.10.6\hdf5-1.10.6\src\H5FD.c line 734 in H5FD_open(): open failed
major: Virtual File Layer
minor: Unable to initialize object
#003: D:\build\HDF5\1.10.6\hdf5-1.10.6\src\H5FDsec2.c line 346 in H5FD_sec2_open(): unable to open file: name = 'C:\Users\Jonathan Proaño\AppData\Local\Temp\76d7fabd-71ac-4f5e-b4e4-097452e2a832.h5', errno = 2, error message = 'No such file or directory', flags = 13, o_flags = 302
major: File accessibilty
minor: Unable to open file
If you get an error like that, it is a bug. Even if it is user error, we should provide more informative error messages. You can send a bug report and a link to your modle to the RAS inbox for this one.