Welcome to the RAS Solution Forums HEC-RAS Help Cell Size vs Computed Water depth

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    sondrfo
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    Hi,

    I am having some thoughts about changing water surface elevation with regards to cell size.

    From what I have seen, there is a joint agreement that reducing cell size until you dont get a change in water surface elevation is the “right” way to check sensitivity in a model.

    My thoughts: Smaller cell size are not always better, e.g. when modelling rivers with cell size << water depth. My question is: Is there a limit on how small the cell size should be, considering computed water depth in your model? Thanks in advance, and a happy new year to everyone

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