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cameronParticipant
Depending on your cell size, you may not have to erase anything. If the cells that are along the 2D connection extend far enough away from the top of embankment (beyond the toe) and have elevations which you want to breach to, then you don’t need to do anything. If this is not the case, you would have to make the grid cells along the dam larger.
If you do want to remove the dam/embankments what I do is buffer the centerline of the embankment a width so that it covers the embankment, then generate a ton of vertices along the buffered line, convert to points, extract elevations, create TIN from points and buffered line, convert to raster, and mosaic to original terrain.
I like the TIN option as it keeps it smooth, if you go from points to raster it can cause a rounding effect.
cameronParticipantI agree with Scott about the issue. You need to either adjust the breach elevation or modify the terrain.
cameronParticipantYou need to reverse the stationing of your stream centerline. station 0 is supposed to be the start of the model.
cameronParticipantThey would have to be area connections
cameronParticipantwith 2 million elements at 5 meters (hope it is meters) the model will take a very long time to run.
Did you check to see how long you actually need to run it? For instance, check when the peak occurs at the downstream end and maybe you can trim the model run time. The other comments provided should help as well. Another thing to think about is how deep the water is. If the max depth is really deep, you can probably get away with larger cells and get the same answer.
It is common for very large models with small grid cells to take a long time to run.
cameronParticipantCannot read anything as it is blurry. 2D models can take a lot longer than 1D models. It all depends on time step, cell size, and number of elements.
Dam breaches have highly dynamic fast moving flow so in general you will need a smaller time step than other applications.
cameronParticipantYou can add internal boundary conditions into the 2D mesh in 5.0.5 so yes you can add in a lateral flow.
cameronParticipantThe profile is based on the invert of the cross-sections which picks the lowest value between your bank stations. It appears that your bank stations may not be set correctly.
cameronParticipantBreak it up into smaller pieces. It If you have a single lateral structure, editing the weir data will take forever as it will take a long time to load data.
cameronParticipantYou can set it so it writes using the computation interval and what time you would like it to. the entire run or specific time frame. It is in the output options in the plan menu.
cameronParticipantdo you have a 32-bit system or 64-bit? the new mapper only works in 64-bit.
cameronParticipantThat’s because it was more of a bug fix release than a new feature release, but they had to include some of the new stuff they did.
cameronParticipantset the max 1D/2D iterations to 20.
What is the weir coefficient you are using for the lateral structure? Did you try setting it to use 2D equation instead of weir?
This all only applies if the issues are near the 1D/2D connection.
May 16, 2018 at 6:09 pm in reply to: Is it available to programmatically control RAS Mapper to export RAS tiles? #11377cameronParticipantI would reach out to HEC to see if there is a way to automate the web map server tiles.
cameronParticipantwhat is your time step?
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