Rarely (if ever) do you see such a constant flow rate.
|All of Florida's spring-fed streams|
flow at a very steady rate ...
But only one has mermaids.
The reason for that its source:
The Floridian aquifer discharges to the surface, at Weeki Wachee Spring, with little regard for the seasons. Winter, spring, summer and fall you can count on it to discharge at a rate of between 100 and 200 cubic feet per second. That's an incredibly steady flow rate in the world of hydrology. This particular spring has been running high for about the past year, but to the naked eye I would guess even that's hard to tell, unless you were scuba diving upstream (which in this case means "straight down") into the cavern from which the current flows, on a regular basis.
Sounds like a good question for the mermaids to me.