"Sloughs" are low-lying areas of land that serve to channel water through the Everglades. These mashy rivers are relatively deep and remain flooded almost year-round.  Though they are the main avenue of waterflow, the current remains leisurely, moving around 100 feet (30 meters) per day.  

Dotted with tree-islands, this vast landscape channels life-giving waters from Lake Okeechobee southward. Everglades National Park contains two distinct sloughs: Shark River Slough, the "River of Grass," and Taylor Slough, a narrow, eastern tributary of the former. There are no surface connections between the two. A series of other sloughs through the Big Cypress Swamp supply freshwater to western Florida Bay and the Ten Thousand Islands.