So I bought this beautiful house and there is a small maybe 30 x 30 duck pond(made) not sure on depth but most likely let’s just say 3-4’ deep. The banks are eroding with the highly saturated soil. The surrounding areas are mostly cedar swamps and higher grounds with oaks , so I have a mixture here. What can I do to prevent the banks, at least the banks I have left from eroding more. I don’t have access to back yard for equipment really so kind of strapped.

I was thinking of using a bunch of broken concrete block I have on property to make some kind of wall but need help, any suggestions are welcome and appreciated