There's three things you can count on in the swamp:
One is our annual spring drought.
The hydrograph above shows the rise and fall of water relative to the center of a cypress dome in Big Cypress National Preserve from 2009 to present. The gray band shows the long-term (i.e. 25-year) range and the dotted white line shows the long-term median.
Caveat: Except in the soggy El Niño dry season of 2010