Sharlene,

You find all the FEFLOW manuals on
on http://www.wasy.de/english/products/feflow/doku.html

Especially the Reference Manual and the White Papers Vol. II contain
detailed information about density-dependent simulations (seawater
intrustion) and how FEFLOW handles these.

For additional and more detailed questions, you might also contact the
FEFLOW support team (support@...).

Best regards,
Peter

WASY GmbH