Louisiana Resources
The surface of the state may properly be divided into two parts, the uplands, and the alluvial and coast and swamp regions. The alluvial regions, including the low swamps and coast lands, cover an area of about 20,000 square miles; they lie principally along the Mississippi River, which traverses the state from north to south for a distance of about 600 miles and ultimately emptying into the Gulf of Mexico, the Red River, the Ouachita River and its branches, and other minor streams. The breadth of the alluvial region along the Mississippi is from 10 to 60 miles, and along the other streams it averages about 10 miles. The Mississippi flows upon a ridge formed by its own deposits, from which the lands incline toward the low swamps beyond at an average fall of six feet per mile. The lands along other streams present very similar features. These alluvial lands are never inundated save when breaks occur in the levees by which they are protected against the floods of the Mississippi and its tributaries. These floods, however, do not occur annually, and they may be said to be exceptional. With the maintenance of strong levees these alluvial lands would enjoy perpetual immunity from inundation. The uplands and contiguous hill lands have an area of more than 25,000 square miles, and they consist of prairie and woodlands. The elevations above sea-level range from 10 feet at the coast and swamp lands to 50 and 60 feet 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, located in northwest Louisiana.
|
