The river flows into many of the lakes, which further confuses navigation. Johns watershed all are shallow, with maximum depths between 3 and 10 feet (1 and 3 m). Approximately 3,500 lakes lie within the overall St. The most efficient way to travel on this part of the river is by airboat. Channel flows are not apparent and are usually unmarked. The river is at its narrowest and most unpredictable in this basin. As of 2015, these past diversions are being partially reversed through the first phase of the Canal 1 Rediversion project. Johns' headwaters eastward to the Indian River through canals dug across the Ten-Mile Ridge near Palm Bay. Johns was significantly lowered in the 1920s with the establishment of the Melbourne Tillman drainage project.
The river touches on the borders of Osceola and Orange Counties, and flows through the southeast tip of Seminole County, transitioning into its middle basin a dozen miles (19 km) or so north of Titusville. Johns transforms into a navigable waterway in Brevard County. The upper basin measures approximately 2,000 square miles (5,200 km 2) the St. Johns River is a blackwater stream, meaning that it is fed primarily by swamps and marshes lying beneath it water seeps through the sandy soil and collects in a slight valley. Indian River County is where the river begins as a network of marshes, at a point west of Vero Beach aptly named the St. Because the river flows in a northerly direction, the upper basin is located in the headwaters of the river at its southernmost point. Johns River is separated into three basins and two associated watersheds managed by the St. Uniquely, it shares the same regional terrain as the parallel Kissimmee River, although the Kissimmee flows south. It ebbs and flows with tides that pass through the barrier islands and up the channel. Because of this low elevation drop, the river has a long backwater. It flows north from its headwaters, originating in the direction of the Lake Wales Ridge, which is only slightly elevated at 30 feet (9.1 m) above sea level. Johns is Florida's primary commercial and recreational waterway. Starting in Brevard County and meeting the Atlantic Ocean at Duval County, the St. In the year 2000, 3.5 million people lived within the various watersheds that feed into the St. It has been the subject of William Bartram's journals, Harriet Beecher Stowe's letters home, and Marjorie Kinnan Rawlings' books. Johns, including Paleo-indians, Archaic people, Timucua, Mocama, French, Spanish, and British colonists, Seminoles, slaves and freemen, Florida crackers, land developers, tourists and retirees. Historically, a variety of people have lived on or near the St. Johns as Florida's population continues to increase. Restoration efforts are underway for the basins around the St. Johns, named one of 14 American Heritage Rivers in 1998, was number 6 on a list of America's Ten Most Endangered Rivers in 2008. Johns, like many Florida rivers, was altered to make way for agricultural and residential centers, suffering severe pollution and redirection that has diminished its ecosystem.
Johns River Water Management District.Īlthough Florida was the location of the first permanent European settlement in what would become the United States, much of Florida remained an undeveloped frontier into the 20th century. It is separated into three major basins and two associated watersheds for Lake George and the Ocklawaha River, all managed by the St. Johns drainage basin of 8,840 square miles (22,900 km 2) includes some of Florida's major wetlands. The narrowest point is in the headwaters, an unnavigable marsh in Indian River County. Numerous lakes are formed by the river or flow into it, but as a river its widest point is nearly 3 miles (5 km) across. Johns has a very slow flow speed of 0.3 mph (0.13 m/s), and is often described as "lazy". The drop in elevation from headwaters to mouth is less than 30 feet (9 m) like most Florida waterways, the St.
At 310 miles (500 km) long, it flows north and winds through or borders twelve counties. state of Florida and it is the most significant one for commercial and recreational use. Johns River ( Spanish: Río San Juan) is the longest river in the U.S. Murphy Creek/Dunn's Creek, Julington Creek, Pottsburg Creek, Intracoastal Waterway/Sisters Creek Mills Creek River, Econlockhatchee River, Wekiva River, Alexander Springs, Salt Springs Run, Ocklawaha River, Rice Creek, Simms Creek, Black Creek, Ortega River, Trout River
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