User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-4555457-20120204023536/@comment-1837917-20120204031214

I'd say we can easily place the Flooded Forest in close location to the sea, but also in a very tropical area that experiences a monsoon season. The Base Camp area is a good example of how much rain occurs - you're camped under an overhang that has sheets of water falling from it. Obviously, to allow for that much water to come in and cause large pools, it's not just rain but also a strong river of some kind, likely coming from the sea (allowing Lagiacrus and Royal Ludroth to migrate). So their is definitely some kind of time change in between Tri and P3rd.