Відео

This will be the last 1D steady flow lecture we post for a while because the second half of the class needs to go out for editing. We'll start posting sediment transport classes in the interim. We are also working on 2D and 1D unsteady, but they will be a while.

Excellent in delivering lecture and thanks for great knowledge sharing 🎉

Could you please provide me with a tutorial to create the spatial precipitation DSS file ? I would highly appreciate it

Very good discussion on the energy gradeline at a drop in the water surface profile. That just recently came up in one of my model reviews, and this helps me give an informed response.

Great video. Thank you Gary!

Great work! I wonder if we could get access to the files/data of some verification problems.

I am learning so much with all the videos you uploaded! Thank you very much for these incredible resources! 😁😁

Just a quick question, if we have a tailing facility (non-Newtonian fluid) and a water dam (Newtonian fluid), then how these two can be modelled as in "Unsteady Flow Data", just one flow regime can be defined for the whole system, i.e. Newtonian or Non-Newtonian flow regime. Please correct me if I am wrong and if there is any solution to model these combination of flow regimes. Thanks

Great video, thx

Muchas gracias!

Where’s lecture 3?

Thanks so much for posting these lectures.

there is a error ： forrtl: severe (64): input conversion error, unit -5, file Internal Formatted Read Image PC Routine Line Source RasUnsteady.exe 00007FF68B457AD7 Unknown Unknown Unknown RasUnsteady.exe 00007FF68B41318F Unknown Unknown Unknown RasUnsteady.exe 00007FF68A9C05D2 READ_UN_MET_PRECI 233 Read_UN_Met.for Error with program: RasUnsteady.exe Process Count = 9 Exit Code = 64

Where can I find L1.3?

Hello, I have a problem I am trying dam breach analys and I had an hdf error. It gives “Error in the time window Hdf error trying to close hdf output file hdf5 diag: Error detected in hdf5”

Why everything is theoretical on these RAS series, why is no practical example being considered

Please make availble all the lectures, its very useful for us students. thank you

Great, pls keep adding this kind of lecture videos

Thank you for making this lecture available for everyone.

Good lecture! Love the discussion on steady vs. unsteady. Hope there are more follow ups!

Many thanks for sharing such a wonderfull class. I love to hear about computational open channel hydraulics especially from a hydraulics lover like Dr Gibson.

Thanks from Bolivia

Answering two previous questions in case the next viewer benefits. The auto-fixing option "Try Fix" can be found by right-clicking 2D Flow Areas under editing mode.

Excellent video!!

Increases velocity near the banks and decreases velocity in the middle!? I thought it's opposite

Hello, Thanks for the video. I'd like to know the HEC-RAS limitations. When we simulate sediment transport, usually we have rivers with steep slopes ( greather than 4%). Which is the max bed slope of the channel that HEC-RAS could handle? could you help me with this question please?

Are future workshops open to State DOTs?

just wanted to ask do we have to import subbasins which were generated in hechms, in hecras and then do we need to define boundary condition for each subbasin separately or do we have to create a single 2d flow area perimeter for all the subbasins as whole, for 2D flood modeling? as we'll be using outputs from hechms which were generated for each subbasin

Is there a way to model infiltration losses of accumulated flow from a precipitation event? For example, having large runoff produced in high impervious areas be infiltrated as it flows into sandy soils?

Hello Friends, can you tell me how can i get the data to work on this projects please?

Good one

Fantastic discussion on HEC-RAS 2D mesh analysis. Well done video.

I think at 9:05, you mean that all cells in the 2D computational grid mesh must by "convex" polygons. I don't think that they can be concave.

How about 2D Computational Options? I was interested to the Layer Thickness parameters. How to assign Initial, Min and Max values? The Initial (or Min) value is the same of the Min Thickness that I have to assign in the Bed Mixing Options? Waiting for your support. Thanks a lot and compliments for sharing!

Good video. Quick question. At "HW position", what is the difference between "left overbank" and "left to the left bank station"?

thank you so much. it was great, but it was a too fast explanation. sometimes it was really hard to follow you.

I got a question. Are the precipitation data you selected when reading in DSS data gradually changing over time, the same value throughout the entire plane, or different precipitation values at different points? I look forward to your answer or anyone else’s answer.

Nice video, can you provide mannings values bibliography please for those coverages?

any books you recomend, please

Great tutorial. Thank you Gary! Is there any tutorial link or documentation on using HEC MetVue to create a gridded rainfall input DSS file from raster data?

When we give the upstream hydrograph data, what is the time duration that we give for the hydrograph. Is it the same as breach formation time as calculated by different methods.

Thank you very much for another excellent lesson. I never gave this topic much importance because I never needed to. But when it comes time to use HEC-RAS to make these types of predictions, I come to watch your videos, because you are my source of knowledge.

Hello, according to the reference manual, in the SWE, the cell velocity is approximated from the face normal velocities. The cell center velocity terms that stem from the weighted least squares method are provided. However, it is not clear how to calculate wk (weight of face k) found in the terms. Inspecting Perot's (2000) paper hasn't helped.

got the error ''forrtl: severe (64): input conversion error, unit -5, file Internal Formatted Read'' after adding point precipitation, how could i deal with it?

How do you select the diffusion or full equation option in HEC RAS?

How do you run the model using the diffussion equation in Hec Ras?

How can I see have the bridge deck in that plot? I used the SA/2D connection to create my brige.

Thanks, amazing presentation, amazing work (Dog also amazed at subgrid bathymetry, 19:11)

nice video. I wonder how to add labels to contours, not to all the map.

Another great video from Gary Brunner, P.E.