Meh. You've cut-and-pasted an article that suggests that localized flooding has happened in areas around the world over time. That's it. 
/and anecdotal
Who escapes localized flooding by building a structure, gathering animals, and floating it out, instead of heading for higher ground?
Floods tend to be instantaneous, hardly allowing for enough time to build anything, even remotetly close to the size of the Ark, to survive it.
And, it appears you missed the following, from Roth:
It is noteworthy that common causes of calamities such as earthquakes, volcanic eruptions, pestilence, and drought are not listed. This also testifies to the remarkable commonness of flood traditions which have been present from the time of man's earliest writing to the present. One could hardly expect that accounts of major catastrophes from all over the world would be so selective of one theme of catastrophe if it had not been based on an actual worldwide event. This dominance strains the proposal that these accounts arose locally.And from Peet:
For there are many descriptions of the remarkable event [referring to the Genesis Flood]. Some of these have come from Greek historians, some from the Babylonian records; others from the cuneiform tablets, and still others from the mythology and traditions of different nations, so that we may say that no event has occurred either in ancient or modern times about which there is better evidence or more numerous records, than this very one which is so beautifully but briefly described in the sacred Scriptures. It is one of the events which seems to be familiar to the most distant nations—in Australia, in India, in China, in Scandinavia, and in the various parts of America.
It is true that many look upon the story as it is repeated in these distant regions, as either referring to local floods, or as the result of contact with civilized people, who have brought it from historic countries, and yet the similarity of the story is such as to make even this explanation unsatisfactory.
