HecRas 2D flow modeling for beginners

HecRas 6.3.1 2D flow modeling for beginners

Here you can find a general explanation of HecRas 2D modeling of flow.
I talked about how to find the projection file, Ras Mapper, How to find the problems and solutions, What is the best type of mesh? , How to see the hydraulic connectivity of cells, Break lines, Refinement regions, How to modify the terrain or add a channel and bridge pier to the terrain, Dynamic time step, Hydraulic warm up and ramp, etc.

(NTNU numerical modeling and hydraulic course- 2023)

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Watching more here:

#hecras #hec_ras #flow #sediment #modeling #cfd #

[andrzejdanilecki]

Thanks a lot Behnam. Good job. regards!!

[jrf]

Can you please make a video on steady flow for 2d model

And how to add lateral multiple structure like embankment shapefile data into the hecras to produce good result

[apeesharma]

Thank you so much for your nice tutorial. Could you elaborate how could i set the elevation and dimension of embankment. Whether use terrain modification or breaklines in 2D area?

[Whyareuse]

Thank you sir are such a blessing 🙏...keep helping students ❤️

[linaperez]

Thank you for the video!! can you give me please more information from where did you download the DEM?

[ibrahimrafi]

sir, I have a question about boundary condition . Why did you choose flow hydrograph for upstream & Normal depth for downstream ?why not both are same or vise-versa?

[zainabbutt]

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

[rutujabapat]

I would like to ask something sir – Have you clipped this DEM according to the study area shapefile?please clarify sir

[karelsanchez]

Thank you for the video, os it possible to get acces to the file to replicate it?

[zafarmohammad]

Hello sir,
I have been trying to generate TIFF files from DEM data multiple times, but whenever I upload them into HEC-RAS, the output appears blurry. I am unsure of what might be causing this issue and would greatly appreciate your guidance in resolving it.Could you please advise me on the correct process or settings to ensure that the TIFF files are clear and display properly in HEC-RAS?

[tristanjanryllmata]

Hi, sir Benham. I am a beginner and saw this tutorial of yours and I really appreciate it.

Is there any way that I can get your data and use it for practicing HEC-RAS? so that I could check my ways if it is in line with yours. Thank you!

[MasihullahHasanyar]

I have a question. The DEM data does not show the real bathymetry beneath the water surface. So how can we run a 2D simulation with such DEM 2D data. ? is there a way to modify the 2D Area of the river main channel according to the real bathymetric data?

[ravichandumunnangi]

I not getting the 2d computational mesh after drawing 2d flow area. It is showing that current mesh contains no computational points. What should I do?

[lijuanwang]

Hi, Benham. I am new to the HecRAS model. I simulated the model but my water did not go downstream and just expanded in the area upstream. Do you know how to deal with this problem?

[anulamichael]

Good day sir, please I want to learn how to model using GSTARS3 for sediment modelling

[aarizahmed]

Can you please share video for canal studies

[BenkyoWarrior]

Great video👌

I have encountered a problem, I followed exactly how you showed but when I click on view>cross-sections it shows "no data for plot". Why might that be?