Sea defense breach storm surge and water quality

[Anonymous]

Hello,

I am a new HEC-RAS user. Is it possible in 5.0 to model flooding that is purely related to a breaching of sea defenses on the coast (not an over-topping of river banks), for example during a storm surge ?

My second question is if it would be possible to subsequently model saltwater intrusions using the water quality capabilities of HEC-RAS?

Thanks!

[Anonymous]

Yes, RAS can incorporate storm surge elevations as boundary conditions along reaches and model the effects of breaches in those boundaries. This has been done with input from storm surge models (like ADCIRC). The reproduction of Hurricane Katrina flooding that was done with HEC-RAS used this approach. The wind waves are not explicitly modeled and any density effects due to salinity are going to be secondary.
Michael

[otlu]

I believe it is possible to model the saltwater intrusion here is an study I found. https://soils.ifas.ufl.edu/docs/pdf/academic/papers/Hanks-Stephen.pdf

Have you try to do it yet?

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