I haven't really been following this thread, so I guess I have a few questions:
1) Does your theory rely on modern animals decending from populations aboard an ark?
2) If not how did modern life survive a recent global flood?
3) If so, why doesn't population genetics reveal that kind of massive bottleneck?
4) If all humans are the decendants of Noah and his family, how were there enough people to build the Pyramids AND leave Egypt in the big exodus? How do you go from like 8 people to some 2.5 million or more in a few generations?
5) Why aren't flood stories more common?
6) Aren't there contiguous Chinese records before, during, and after the time the flood is said to have occured? (Somebody on the board mentioned these; I haven't been able to find a link.) Why don't they mention the flood?
That's just the stuff I've come up with. Obviously it's mostly biological. But it seems to me that a global flood has consequences that stretch beyond the geological. (Indeed, it's "global" in its consequences, if you'll pardon the pun.) Maybe you've managed to bend geological evidence into your flood story, but from the biological perspective I remain unconvinced.