First of all there is no way that dinosaurs were around during Noah's flood, otherwise we would here about them more in the bible as being around during that time. Second, there is no real evidence that the huge flood even happend. There is however, evidence to show that a flood fell over Mesopotamia around the same time, and the story could have been embelished to warn people of their actions. I'm not saying I believe it, but I've seen many specials about it on the history channel, it's just something to think about.