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cameronParticipant
Depends on inflow hydrograph, timestep, number of 2D cells, how well the mesh is made, number of structures, solver you are using, how well the 1D/2D model iterates between the two, and probably other things.
cameronParticipantI have done models that are over hundreds of miles in 1D/2D. so it should be able to handle it.
I use ArcGIS for initial LiDAR processing and once you have the terrain, HEC-RAS will copy the terrain to a tif format. Other software might be Global Mapper.
cameronParticipantNot at this time. Hopefully the will do something in the next version.
cameronParticipantdid you try doing this on the local machine? Sometimes networks cause problems.
cameronParticipantI have done about 2 million cells in one mesh.
You usually one at least a couple points inside of each cell so 100 meter mesh might make the most sense in most areas, but add in detail where needed.
You can specify DSS files for the boundary conditions. If you are running multiple models, you would need to start with the one upstream which would then feed into the one downstream.
cameronParticipantYes. You would have to update the Mapper rasmap file so it would read it.
If it is from the same model just run on different machines, it would be easier.
cameronParticipantcode that would read the rasters. I also use similar code to create animations in ArcMap.
cameronParticipanthow do you measure the flow?
What is your output interval?
cameronParticipantyou need to place your upstream boundary at the upstream end and not the downstream end.
cameronParticipantoutput files can get extremely large by doing this method and selecting the time frame you care about it recommended.
cameronParticipantThere is not an automatic way to do this.
What I have done is created rasters of each of the output intervals and used some scripts to create the KMZ file.
cameronParticipantyou cannot turn off cells in HEC-RAS at this time.
cameronParticipantWhy don’t you just place them close to the final stagnation solution from the run that worked? The model is trying to converge to something and it can’t do it which probably has to do with different versions of HEC-RAS, changes made to the geometry, or changes made to discharge.
There have some big changes from 4.1 and 5.0.0 and smaller changes from then on. Bridges and culverts and how they calculate are one of the big changes.
cameronParticipantIn Mapper, load in the GIS layer, select it and hit copy. Go to Edit mode and right click on the Boundary Condition layer and select paste.
cameronParticipantIt looks like you are trying to specify a flow hydrograph at the downstream end of the model. Usually a normal depth or stage hydrograph is used for downstream boundaries.
As stated in the error you need to specify a initial wse for the boundary condition. Next to the Min Flow and Multiplier input option there is a Initial Stage box that needs information.
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