Some freinds of mine have a place in the country (it’s so far out of town that I have to keep reminding myself that it is still in this country) where they want to have lots of raised bed gardens. However, the yard is a swamp.
They plan to add a French drain!
Just between you and me. This seems to be just the kind of thing the Romans would have been all over.
Anyhow, a properly installed “French” drain can move a lot of water away from yards and more importantly foundations.