Site: Central Arizona - Phoenix LTER

ISCO autosamplers were placed along the length of the flume, at strategic locations, to capture the movement of the fluorescent dye. These dye studies not only confirmed that the Biological Tide generated surface currents in the marsh, but the water residence times calculated from these studies closely matched those calculated from the ARC team’s water budgets.
Credit: CAP LTER

Plants at the Tres Rios constructed wastewater treatment wetland were found to be highly productive, transpiring large volumes of water, particularly in the hot, dry summer. A plant driven “biological tide” brings new water and nutrients into the marshes to replace these transpiration losses, making a treatment wetland more effective than if it were located in a cooler or more mesic environment.