Hypothesis: A flood wiped out all of mankind except one family.
Archaeological proof necessary: Evidence that cultures around the world came to a simultaneous halt when all of their members were killed, followed by a gap in any kind of activity, followed by the introduction of a totally new culture as Noah's descendants eventually reached these parts of the world again.
Archaeological proof found: Looking at Central Asia, Western Europe, South America, The Middle East and India (for a start) we see no breaks in the archaeological record. Cultures progress more or less smoothly and change gradually, except in cases of conquest, over at least 13,000 years (in the Americas. In other places, they continue for as long as 20,000 years. Before this time we do not even find evidence that people had the tools to build large boats, let alone that they did so.)
Conclusion: The hypothesis is false.