a couple/ few times a year, our forest river floods an area dumping all kinds of yummy run-off goodness and sand, which is a treat in this land of clay. I've seen 100 year old whole oaks go screaming by, so the current is pretty strong. What could I plant on the river's edge that would not get creamed in these floods. They happen mainly in the spring, but with the past couple day's 5" and counting, it may happen at any time. Within a couple days of the rains stopping it quickly returns to normal.
During the late summer common drought, this area is a few feet above the river's water.
The haskap bush was initially a plant that grew near river banks and marshlands. The flowers are very frost resistant. It looks and tastes sort of like a blue berry but with a hint of raspberry in it. I'd try it.
If the water moves violently across the landscape I would forgo the edible angle and just go straight to poplar, aspen, alder, green or black ash and willow to control erosion. Cat tails are a mixed blessing but could prove useful as a filtering plant.