I don't know anything about SWI, really. I'm reading.
I heard someone say SWI, and thought I know nothing about it.
Don't know if it was in relation to the well or trees.
I was thinking that with drought, the saline water might be coming up higher in the soil through capillary action or whatnot.
With tidal lands, I'm curious how roots grow if not saltwater/ flood adapted species. Lots of doug-fir at waters edge around here. Some slowly tipping in, and growing against gravity, making a perfect free climbing tree. A ladder of branches on a curving, less than vertical trunk.