If the Flood had been local the would be no reason for Noah would to build an Ark. God decided to send the Flood 120 years before it started so even on foot with all their live stock Noah and his family could have easily gotten to the other side of the world and so as to escaped any local Flood.
Even if God had Noah built the
The Bible says waters of the Flood peaked at 22 feet above the mountains, this would by definition be a Global Flood. Genesis 7.
A local flood would not affect people who did not live in the vicinity of the flood. That would make it useless as a judgment of man's sin.
God promised never to send such a flood again. There have been numerous local floods throughout history, so God would have repeatedly broken that promise.
In addition, any flood; in the
In the late 1990's it was claimed that a local flood of the
The simple fact is that the Genesis Flood was global.