Sorry to see these photos. Time to kill off the remaining fish population, add some depth and structure if you want, and consider your next fishery plans for Spring.
Consider a punching a well...it's great for peace of mind. Mine pumps 50 GPM and keeps five ponds in good shape [four .3 micros and a 3 acre], even during this drought in NE. Your pond looks like .5 - 1 acre - even a modest flow should keep it topped off easily. Best money I ever spent for my ponds.