Reversing Falls

Via Wikipedia

In Saint John, New Brunswick, Canada, 100 billion tons of water flow in and out of the Bay of Fundy each day by way of the Saint John River. Yes, in and out of the same river. The water level of the Bay of Fundy changes a dramatic 28 feet between low and high tide. This nearly 10 meter change results in a “reverse falls:” the rapids run towards the bay at low tide, but move back up the rapids at high tide. As we know, tides are caused by the gravitational force of the sun and moon on Earth’s bodies of water. As such, we can deduce that the high tides on the rapids coincide with periods where Earth rotation positions New Brunswicks is towards the moon, while low tide coincides with when the moon is on the opposite side of Earth as New Brunswick. The bay reaches extremely high tides when the moon is in full or new moon. This leads the rate of water backflow in the river to exceed 100 billions tons of water, greater than the volume of every river on earth.