The earth is flat, and rotates slowly. This motion creates a slight force that pulls objects to the rim. As objects (almost exclusively sea water) slowly move towards the south pole rim, the rotation of the earth is slowed. As the earth's rotation slows, water seeps slowly back closer to the north pole. As it approaches the north pole, the earths rotation accelerates.
Imagine one of the cheap "merry-go-rounds" in a park or playground. At it's edge, imagine an icewall that extends upwards. The object is filled with water. Now the object is spun at a reasonable speed. The water will move in and out, in and out. These are your tides.
Implications
This means that the tides, over billions of years, will come to a stop.
Test of FE or RE
As we observe the tides, we can conclude whether the earth follows a roundearth model or a flatearth model. Under a roundearth model, the tides will decline and the moon will crash into the earth. Under a flatearth model, the tides will decline and the moon will stay in its current cycle.
The test is simple, what is the relationship of delta-tide to delta-moon? Is there a strong relationship, or a weak one? I am confident, with testing, we will find there to be a very weak relationship.