It's your side that keeps going on about the flood. I am just responding to challenges and inquiries, yours for example. Why do you keep going on about this?
I accept the other flood, the world wide one which has not been debunked even after considerable concerted effort. Did you lose that one in one way or another while formulating your inquiry? No matter, when overly hasty, one can lose either way.
A world-wide flood as described in Genesis HAS been thoroughly debunked. Perhaps not to the satisfaction of you, or other irrational persons, but debunked nevertheless.
The multiple lines of evidence that such a flood never existed are too many to ignore. Among them:
Lack of geological evidence for such a flood.
Continuity of cultures world-wide during that era.
Genetic evidence (no bottleneck for every species on the planet)
....and possibly quite a few others.
The fact that you cling to this quaint -- but mythical - tale above all the evidence to the contrary speaks volumes about your thought process as it pertains to science.