RAS 2D Detailed Channel Modeling

[SteveS]

Looking over the HEC-RAS 2D manual, it indicates that it is suitable for detailed in-channel modeling. However, the only examples I’ve seen have been for large-scale floodplain type studies and not modeling more detailed in-channel hydrodynamics – ie. flow patterns in river bends, eddys, flow jets, etc. Is this something RAS 2D capable of simulating accurately?

Has anyone done any testing/verification of RAS 2D to any flume studies or compared results to other 2D models such as RMA, Mike, Delft, Tuflow, etc.?

Thanks!
Steve

[cameron]

I have tested and compared it to other 2D models and will say this about HEC-RAS 2D:

In it’s current form, I would would not use it for detailed in-channel hydrodynamics for the items you mentioned. I would probably use either SRH-2D, RiverFlow2D, or TUFLOW FV.

Mesh development in HEC-RAS 2D is lacking currently and very time consuming if you want to add a lot of detail. This is going to be fixed eventually, but not sure how soon.

I would recommend only using HEC-RAS 2D for Floodplain and Dam/Levee Break studies.

[Anonymous]

To grave-dig an old thread-

Is anyone aware of any ‘official’ benchmarking that has been undertaken for HEC-RAS 2D? For example a few years ago the UK Environment Agency compared a number of 2D models using a standard set of tests and reported on the results.

My organisation is keen to start using HEC-RAS 2D but there seems to be little information available on how the results obtained will compare to established packages like MIKE 21 and Tuflow.

[Author]

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