Відео

Hi, thanks for sharing your knowledge! Is in the plans of the HEC team to implemente the ability to run a varied Cv for non-newtonian simulations like in FLO-2D?

It is possible to have more details about the example presented as: Sudden Expansion Lab Experiment ? I recreated the model with HEC-RAS 2D, but I don't understand whether the image presented at min 4:00 is a view from above of half the channel or of the entire channel. I modeled with HEC-RAS as in the image, but vortices are also formed on the upper wall, and the speed trend does not correspond to that presented with both conservative and non-conservative turbulence models.

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!

Thank you, excellent tutorial. I have a question: how can I estimate my CV through HMS? and what information would you need to feed that model? Thank you

Excellent presentation, you really contribute a lot with your knowledge, especially to countries where these issues are not deepened. I have a question for you, when the fluid is dilating, that is, there is an internal collision of the particles and that large blocks float on this fluid and are transported. What kind of non-Newtonian flow model of Hecras could I implement to simulate it? Thank you

Very helpful video. Thank you for sharing this

Cool and very useful functionality. Thank-you for sharing. NOTE: The only way I was able to get it to run in v6.5 was to make the inflow boundary an external condition.

Dear Prof. Gibson, I've trouble and error : Unsteady Input Summary: 2D Unsteady Diffusion Wave Equation Set (fastest) 2D number of Solver Cores: 12 HDF_ERROR trying to use HDF output file Subroutine HDF_SET_COMPRESSION HDF_ERROR trying to close HDF output file: HDF5-DIAG: Error detected in HDF5 (1.8.11) thread 0: #000: ..\..\src\H5Pdcpl.c line 869 in H5Pset_chunk(): all chunk dimensions must be less than 2^32 major: Invalid arguments to routine minor: Out of range Error starting unsteady simulation - Stopping compute process What is the solution for this case, Thanks before

Thanks for sharing. I do not know why does not work for me.

hello, How can I validate an HEC-RAS model if the observed water heights are twice as high as those simulated for a centennial flood?

hi, How can I validate an HEC-RAS model if the observed water heights are twice as high as those simulated for a centennial flood?

Thank you for your comprehensive explanation.

Silted in MUCH??!!

can they be used to calculate the Volume of deposits of 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

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

Hi Dr. Gibson, when I run my model, this error messages popup. I checked all my input data - flow duration and computation increment, all data is more than 0. Can help to clarify why this error keeps happening? Sediment Transport Analysis HEC-RAS 6.x An error occurred with sediment boundary data. The Boundary duration data and Computation Increment Must both be greater than 0.0 Please check your data.

Why go through the hustle of log-transforming the data and using a complicated equation to avoid a transformation bias? Why don't people fit a non-linear model in euclidian space from the get-go? Is it just that log-sapce is better for visualization or is it a historic thing?

Thank you for the video. When you copied the coordinates into the barrel GIS data, did that change the length of the culvert?

This dam failed in 19

Very cool! This reminds me of how different periods of freezing/thawing (as well as many other processes) create distinct layers of snow and ice crystals over a snow slope - which can be responsible for avalanches.

These Podcasts are really cool, the excerpts with additional complemenary data/videos/graphics makes it super interesting. One thing I would like to see added, is the option of having video format for the whole podcast like Joe Rogan does IT just gives a nice feel to it, Morevoer, these images can be shown in real time, during the podcast with some help ofcourse, Furthermore, these edits can still be continued after the podcasts.

Congratulations Stan! Great acceptance speech!

I love you!! Thank you much.....

Well deserved

Bro, you just found fresh Troll dung!! 😅

It's so much fun to see a former student! I always wonder what the "kids" are doing with their lives. Congratulations, Stan. Well deserved recognition.

BRAVO!!!

Too good to give thanks......but still thank you so much sir❤

Model of How the Grand Canyon was made.

Congrats!!! And thank you for the general tip about using "Rules" for gate controls. I just used it in a Debris Model by assuming the bridge will clog when approximately half amount of material passes through the bridge opening.

Thank you very much for this very useful video, from Cote d'Ivoire (Ivory Coast)

Congratulations!🎉🎉🎉🎉

Very useful, thanks for the lesson! I'm working with this Bingham model in my master thesis. I have a question about the non newtonian Cv parameter: If I set the Cv = 60% and select the "Do Not Bulk" option, then the simulation doesn't take into account the volume concentration? Or is it actually taken into account but its assumed that it is included in the flow hydrograph? (and if so, how does the bulking factor work in this case?) I have been running the model all this time with "do not bulk" option, does this mean I am modeling clear water?

Thanks sir. thats helpful for ma paper. How to solve the error, Minimum error exceds allowable tolerance at ??? I am from Afrika Ethiopian 🇪🇹

Congratulations🎉

How to export the clone terrain to a raster for use in arcgis or other programs. Tried to use the export raster option, but it just export the image raster.

🎉🎉🎉

I'am very grateful for people like you.

Interesting! A quick question: how does RAS account for the fluid density of the debris flow mixture, and how to specify the material’s specific grain density? Density is often twice as large as clear water and can have significant impact on flow dynamics. Thanks in advance!

Hello, i have written to you before. I'm working on my bachelors thesis on HEC-RAS sediment moddeling and have run into an issue while hydraulicaly calibraing my model. I have 6 gates in a SA/2D connections opening based on the rules i've set but based on my previous runs it seems like they dont follow the rules at all in fact most of the gates dont open at all. This has left me and all my professors confused since we do not see any problem with my model. Would you please help me because i have been trying to resolve this issue for over a month now and I'm at my wits end. Thank you very much.

Good job Stanford

thank you so much! very helpful!

Wow, even the huge natural arch is gone now.

Thank you for your instructions!

Thank you for this video, greetings from Prague

Hi Dr. Gibson, I want to know the difference between the 2D Initial Condition/WarmUp (Ramp Up hours) and the 2D Sediment WarmUp Periods (concentration, gradation & bathymetry). Do I need both warmup parameters for a 2D Sediment analysis or when I'd need to introduce those 3 sediment warmup periods? Thank you so much for your videos!! (I'm from Peru btw)

Hello! Is there a way to print this results directly from RASMapper Plot? I don't see an option other than a screenshot or snip. Thanks!

Dr. Gibson, please help me. I cant visualize “bed change” in RAS Mapper

When I try and run a model with a dataset and following the instructions in the videos I get the following error: An error occurred while reading sediment data at (blank) review your data at this location for completeness and consistency I checked and there is bed gradation data and all my cross sections and I am testing out my downstream boundary condition as equilibrium load to rule out any errors. What is the overall meaning of this error and how do I fix it?