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marsh porosity for raised feature in RMA2


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I am modeling a tidal marsh area which have some raised features such as ridges, roads, and man-made rock dikes. These features would be dry under low tide conditions and wet under high tide. I am using the marsh porosity for wetting and drying. What kind of marsh porosity values (AC1, AC2, AC3 and AC4 in DMT card) should I use to have these raised feature elements correctly modeled? Thanks.

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  • 2 weeks later...

The values for AC1, AC2, AC3 and AC4 depend on the conditions you are simulating.

Is there any reason you are not modeling the ridges, roads and dikes with 1-D weir structures?

What is the resolution of your mesh in the area of these structures?

Are you just looking to simlate the flow over these strucures during high tide?

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