What is the topography of Everglades?

The Everglades is a vast, slow-moving river of grass covering an area of about 1.5 million acres in southern Florida. It is a unique ecosystem characterized by its sawgrass prairies, mangrove forests, and cypress domes. The topography of the Everglades is generally flat with a slight southward slope. The elevation ranges from sea level at the southern tip of Florida to about 18 feet above sea level at the northern end. The landscape is dotted with numerous sloughs, ponds, and tree islands. The water depth in the Everglades varies from a few inches to several feet during the wet season and can recede to a few inches or completely dry out during the dry season.