I was wondering how saturation is calculated in the model. Additionally, if a DEM with MTL as it's datum is being used (and MTL is already set to 0), do you still need to plug in GT and historic trend? MTL-NAVD88 would be set at 0, correct?
For the saturation question, please see the section on saturation (page 25) in this document
http://warrenpinnacle.com/prof/SLAMM6/SLAMM6.2_Technical_Documentation.pdf
and feel free to ask if questions remain.
As a simplification, "direction offshore" is used to calculate distance to water in these calculations.
Yes you need the GT to calculate the MHHW and MLLW and many wetland lower-bounds are tied to these elevations. Historic trend is also required as this is used to adjust eustatic SLR scenarios. MTL-NAVD88 would be set to zero. -- J