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jonathan

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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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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