If you think the Flood was a local one, then Genesis as narrated, wouldn’t make much sense.
- If it is only a local or regional, then why built the ark at all?
- Why collect all types of animals they don’t use or eat?
It doesn’t make sense that the Flood being not global, to save all those unclean animals and wild animals. All they need to do is save only animals that they would raise, use or eat. All they would need are some cattle, sheep, goats, fowls, etc, some working animals, such as horses, donkeys, camels, dogs, etc.
And if it is only local or regional flood, why even built an Ark.
Noah is a prophet, isn’t he?
If yes, then all Noah had to do was move to region, not affected by flood. He could have easily move out of the region, since he had 100 years between receiving revelation and early warning about the Flood, when he was 500 years old (Genesis 6) and when the rain came (Genesis 7).
Noah had plenty of time to move himself and his family and animals a safe location, away from people whom God intending to drown. It make far more sense, to migrate to area, not affected by floodwater, and build new home there.