出典:Wikipedia
出典:『Wikipedia』 (2011/06/25 09:43 UTC 版)
The Missouri River is a major river of central North America, and is a tributary of the Mississippi River. It is the longest river by name on the continent at 2,341 miles (3,767 km), and the second largest tributary of the Mississippi by discharge, after the Ohio. The watershed of the Missouri River drains nearly 530,000 square miles (1,400,000 km2) of the Great Plains east of the Rocky Mountains, spanning parts of ten U.S. states and two Canadian provinces. Around 10 million people live in the basin, many concentrated in urban centers along the main stem such as St. Louis; Kansas City; Omaha; Sioux City; and Great Falls. Measured from its hydrologic source in the Centennial Mountains of Montana to the Mississippi's mouth at the Gulf of Mexico, it forms part of the fourth-longest river system in the world.