Another big problem with Noah's Ark is the very fact that the animal's would be crapping everywhere making a huge mess. furthermore, How would Noah have estimated the right ammount of food for all the animals to last that entire pleasure cruise?
How would he have been able to have clean water for all the animals and his family?
Answers: He could simply have cleaned all the poo off the ship using a mop, then slide it all overboard. For the ammount of food needed, Noah only had to determine the average daily rations per "kind" of animal before the trip.
And in order to purify the water, Noah could have built a fire on the deck using the dung chips from livestock to boil water with. (I don't even know if that would work, but it sounds cool).