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.
Time-step and numerical methods are not the reasons, because I tried
implicit methods (such as 15 or 16) as well as explicit methods (e.g.
11) with different small time-steps (like 5 seconds!) but the NaN
problem is still printed in .mon-file.
Using the .ada-file in a map-view, I realized that NaN values are
started from the dry and wet areas (the tidal part of the Domain(e.g.
an island)) and expanded to rest parts of the domain till all cells
become NaN. Has Delwaq a problem with dry/wet boundaries? I have in my
open-boundary an island, where is included in my D-Flow and using
bathymetry elevations behaves on its boundaries as dry/wet boundaries.
But in Delwaq, these areas become NaN and cause to all cells after
some time-steps become gradually NaN. Could you tell me how can I
solve this problem?