The problems in these two places is that the land will be moving back in to the other land spots and you are losing beach space. The situation is that the land wider and save the beach. The solution is dread sand from the ocean. You could add jetties to the areas.
One more solution
Another solution for this problem could be just start getting ready for the problem to occur. you cpould also take sand from other areas and put it in the areas that it needs to be.