After running Delwaq2, the continuity value becomes NaN in some part
of Domain. Could you tell me the reason of that? When the
Delwaq2-parameters beom NaN (None a Number)?
This could not be due to any process parameter, since no processes
are involved. It could happen when you have used a transport scheme
that is not appropriate for the case you are modelling and/or when
your time step is too big. Try using an other scheme and/or a smaller
time step. High vertical dispersion could also cause problems. You
could apply a factor on the vertical dispersion from FLOW.