Відео

Thank you so much, Dr. Gibson. This is incredibly helpful! I do have a follow-up question-how can we address those problematic cells? Would it be better to add breadlines to guide the cell faces in specific directions, or should we decrease the cell sizes/add computational points in those areas? Do you have other suggestions? Thanks!

I have a problem on HEC ras,i working on unsteady flow of river, so when I am on the cross section step I find that the elevation corresponds to points of equal distance zero, can you tell me how I should solve the problem

I have a relatively simple model with 4 culverts from upstream to downstream at several stations. The water don't even go through the first culvert... it stucks there and after a while the model computation failed. I check many times DTM US e DS elevations at culvert, I increased or decreased cell dimension, I diminished timestep to 4 or 5 seconds, I verified that slope is positive and ate least 1% locally from US to DS of the cuvert barrel but nothing. The model doesn'ty run! I cannot find a solution.... it's 1 week I stucked there, I created entire model from the beginning but nothing.... nothing 😕... Do you have a page to submit bug requests? I think it's a software bug...

Hi! and what about "Prior WS File Name" option to load initial conditions from previous model?

Hello, I am Hsuan-Yu Lin, a assistant professor from the Department of Civil Engineering at National Chiayi University. I am currently working on an educational video about the principles and applications of hydraulic flushing. Your video is highly insightful and inspiring, and I would like to ask for your permission to include a segment of it in my project for educational purposes. Proper credit will be given in the video. Looking forward to your response. Thank you!

"Helical flow is putting it there." Yes! We like to put diversions in deep and stable places so yeah physics!

for circle pier of 1.75 radius what is the x and y value sir

Awesome quick tutorial! Measuring and copying the coordinates was a game changer thank you

I have made modifications on the terrain. But I am unable to see such modifications in the zipped file. How can i solve this issue?

Nice work! The Purple Panthers will practice the Danger Zone passes tonight!!!!

Thank you for this wonderful video. I have a question regarding riprap design to protect against local scour downstream of a stilling basin. Since there is no bend in the channel, I wanted to ask if the general scour calculator in this tool can be applied for local scour calculations. Could you please advise?

Thanks for this wonderful video.

Very informative video thanks for sharing. Watching from Southern Africa. and just subscribed.

With how you mention sediments moving through gates, is it now possible to simulate flushing?

Hi Sanford. Very helpful modeling approach you demonstrate here. I am interested in what you might think of this approach. It was challenging to get the cells in the refinement regions lined up so perfectly with the pier terrain modification. I kept seeing leakage at the piers, so I did the following: Place the piers in the model at just a tenth or two smaller than they really are. Establish the Refinement Regions by tracing over the pier modifications, mesh the model, edit the Computational Points as needed. Then, return to the pier terrain modification editor and edit the pier width to the real, slightly wider width. I'm hoping that the result will be that the Terrain is modified for the pier and it will widen into the adjacent cell, effectively blocking that side of the cell and preventing flow from "leaking" through it.

hello trainer. I would like to know how to make the scale appear at the bottom of the map on HECRAS!???

Congrats Stanford. Your mission to balance science and consultancy is an honor. Climate change is bringing more disequilibrium making your mission an urgent one. So: what a footprint you are leaving!

Ras mapper tab not open

thanks to professor Recking for his worthy advices along my doctoral dissertation. I wonder if HecRas would consider including his friction and sediment transport equations, which I have coded for fluvial morphodynamics, because they are numerically manageable while highly robust in a large range of scales/contexts for mountain rivers.

thank you so much 🎉 May I know is there any updates on BSTEM?

thanks..since i am doing erosion study due to bed mining, your uploaded videos are very helpful, helps me better digest the sediment analysis process

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!!!