Mass Balance
The mass balance variable, massBalance, is defined as
massBalance = dwcInt + ntfluxInt - GInt
where:
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the variation of total moisture content per unit time in the domain, dwcInt, is:
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the total net moisture rate, ntfluxInt, is the integral of the total moisture flux over all exterior boundaries:
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the total moisture source, GInt, is the integral of the moisture sources over the domains: