I haven't read that much aboout the geological aspect of the flood, I have been concentrating on the people and their life-style, their possible beliefs, and human society at the time.

From the little I have read about the theory of the flood itself, I know that many disagree with the idea of a cataclysmic flood, putting forward a theory that the flood was a lot more gradual. The situation would not have been that of frightened people feeing a tsunami that wrecked their life, but of people who noted the change, and acted on it, moving further inland to avoid the flood altogether.

Here, I would like to point out the example of the Moken people, who were in the region where the tsunami did most damage, but survived with least loss of life. I think that the people who lived by the shores of the black lake would have been able to read the signs of the coming flood, and possibly were proactive in moving away from the rising water.

here's a link to info about the flood:

http://www.rense.com/general62/pretsn.htm

http://www7.nationalgeographic.com/ngm/0504/feature4/online_extra.html