How?The flood could have been caused by the rapid movement of continents and huge tital waves, in addition to rain.
A wave is transient; it may get everything wet, but most of the water immediately recedes, even with the biggest wave. Also, a wave doesn't change the total amount of water on the planet; if the water level goes up in one place, it would have to go down in another. If a wave were to flood an entire continent, it would probably mean a dry ocean bottom on the other side of the world. Tidal waves couldn't create a flood that covered the surface of the Earth for 40 days straight.
Also, this would cause huge amounts of stress on the continents. Soil keeps a record of how the maximum amount of stress was placed on it in the past - we can see it in the consolidation curve.
Now... this part is a bit heavy and dry, but have a look at page 2 in this PDF. See the two graphs? Look at the one on the right - when soil is put under stress (e.g. when it's had a glacier on top of it, when more soil is deposited on top of it, or, hypothetically, when continents shift back and forth so quickly that it causes tidal waves), it permanently compresses the soil. That maximum stress on the soil shows up as a "kink" in the graph when we load a sample. The stress where the kink occurs is the same as the greatest stress that the soil has ever been subjected to.
All over the world, the behaviour of soil matches the accepted version of the history of the Earth (i.e. slow movement of the continents, no global flood, glaciers sitting on parts of the world at different times). It does not agree with a sudden worldwide flood, and it certainly doesn't agree with tidal waves created by all the continents moving rapidly back and forth.
How?Then after the flood, the change from wet, swampy conditions to more like we have today (more inhabitable), could have transpired at a pace more rapidly than what we experience now.
The way that surface and subsurface drainage works is very well understood. What was different, and why are things different now than in your hypothetical past?
No... just an idea. I wouldn't even rate this one as a hypothesis. You have a long way to go before you get to "theory".Just a theory.
But even if you assume a God that could move continents doesn't mean that he did.I mean we're talking about a world that we assume God created, because of the earlier question on death & dinosaurs. So surely a God who created a world, can move continents.