None of the research you are providing have anything to do with the fact that if a flood that is anything from 6 inches deep to 20 feet dirt destroying the soil - some of being water logged for months. You're talking about food in a time where there is no weather upheaval.

And, of course, not every place will be flood simultaneously. The point is that sooner or later, this will impact us all. If your food supply is wiped out for one season, where will you get food?