Geography of Louisiana
Louisiana is bordered to the west by Texas; to the north by Arkansas; to the east by the state of Mississippi; and to the south by the Gulf of Mexico.
The surface of the state may properly be divided into two parts, the uplands of the north, and the alluvial along the coast. The alluvial region includes low swamp lands, coastal marshlands and beaches, and barrier islands that cover about 20,000 square miles (52,000 km2). This area lies principally along the Gulf of Mexico and the Mississippi River, which traverses the state from north to south for a distance of about 600 miles (1,000 km) and empties into the Gulf of Mexico; the Red River; the Ouachita River and its branches; and other minor streams (some of which are called bayous). The breadth of the alluvial region along the Mississippi is from 10 to 60 miles (15 to 100 km), and along the other rivers the alluvial region averages about 10 miles (15 km) across. The Mississippi River flows along a ridge formed by its own deposits (known as a levee), from which the lands decline toward the low swamps beyond at an average fall of six feet per mile (3 m/km). The alluvial lands along other streams present similar features.
The higher and contiguous hill lands of the north and northwestern part of the state have an area of more than 25,000 square miles (65,000 km2). They consist of prairie and woodlands. The elevations above sea level range from 10 feet (3 m) at the coast and swamp lands to 50 and 60 feet (15–18 m) at the prairie and alluvial lands. In the uplands and hills, the elevations rise to Driskill Mountain, the highest point in the state at only 535 feet (163 m) above sea level.
Besides the navigable waterways already named, there are the Sabine (Sah-BEAN), forming the western boundary; and the Pearl, the eastern boundary; the Calcasieu (KAL-cah-shew), the Mermentau, the Vermilion, Bayou Teche, the Atchafalaya (a-CHAF-a-LI-a), the Boeuf (bow), Bayou Lafourche, the Courtableau, Bayou D'Arbonne, the Macon, the Tensas (TEN-saw), Amite River, the Tchefuncte (CHA-Funk-ta), the Tickfaw, the Natalbany, and a number of other smaller streams, constituting a natural system of navigable waterways, aggregating over 4,000 miles (6,400 km) long.
The state also has political jurisdiction over the approximately 3-mile (4.8 km)-wide portion of subsea land of the inner continental shelf in the Gulf of Mexico. Through a peculiarity of the political geography of the United States, this is substantially less than the 9-mile (14 km)-wide jurisdiction of nearby states Texas and Florida, which, like Louisiana, have extensive Gulf coastlines.
The southern coast of Louisiana in the United States is among the fastest disappearing areas in the world. Rising waters and erosion (both natural and man-made) have led to the state losing a land mass equivalent to 30 football fields every day. And as the communities disappear, more and more people are leaving the region
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