"How many cubic miles of water would it take to raise the sea level even one mile?"
Why are you asking a question you don't know the answer to, yet using it to dismiss an idea?
There is more water IN the earth than ON it. What's more all that water getting out would wreak havoc well beyond a mere static deluge.
Well, I *have* run the numbers. I *have* thought about the mechanics and devastation associated by the transport of this volume of water. I don't think many of the biblical-flood proponents have thought about it seriously.