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Relation between water content and pressure head in porous media

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Old   March 13, 2019, 09:09
Default Relation between water content and pressure head in porous media
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Hi,
I have recently started reading about porous media, and particularly single and double porosity models. I have seen that these models use either a transport equation for water content (θ) or pressure head (h). In case the pressure head (h) is calculated, I found several empirical expressions, obtained from the retention curve, which can be used to calculate the water content. These expressions are non-linear expressions, thus it makes me wonder: how do you calculate the water content in case we know the pressure head. Do we use the same expressions? And if yes, are we solving inversely these non-linear expressions?
Thanks for your time
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non-linear expressions, porous media, retention curve

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