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Zajímavosti o řece Mississipi

03.03.2013
Příroda
Zajímavosti o řece Mississipi

Mississippi River Overview
The Mississippi River is one of the world´s major river systems in size, habitat diversity and biological productivity. It is the third longest river in North America, flowing 2,350 miles from its source at Lake Itasca through the center of the continental United States to the Gulf of Mexico.

When compared to other world rivers, the Mississippi-Missouri River combination ranks fourth in length (3,710 miles/5,970km) following the Nile (4,160 miles/6,693km), the Amazon (4,000 miles/6,436km), and the Yangtze Rivers (3,964 miles/6,378km). The reported length of a river may increase or decrease as deposition or erosion occurs at its delta, or as meanders are created or cutoff. As a result, different lengths may be reported depending upon the year or measurement method.

Length
For reasons mentioned above there are competing claims as to the Mississippi's length. The staff of Itasca State Park at the Mississippi's headwaters say the river is 2,552 miles long. The US Geologic Survey has published a number of 2,300 miles, the EPA says it is 2,320 miles long, and the Mississippi National River and Recreation Area suggests the river's length is 2,350 miles.

Width
At Lake Itasca, the river is between 20 and 30 feet wide, the narrowest stretch for its entire length. The widest part of the Mississippi can be found at Lake Winnibigoshish near Bena, MN, where it is wider than 11 miles. The widest navigable part of the Mississippi is Lake Pepin, where it is approximately 2 miles wide.

Speed
At the headwaters of the Mississippi, the average surface speed of the water is near 1.2 miles per hour - roughly one-third as fast as people walk. At New Orleans the river flows 3 miles per hour on average.

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Více na:http://www.nps.gov/miss/riverfacts.htm

ZDROJ: http://www.nps.gov

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