User talk:Ayomi25

•	The Amazon River Countries	 Peru,   Colombia,   Brazil

Region	South America

City	Iquitos (Peru); Manaus (Brazil) and Belem do Pará (Brazil).

- location	Nevado Mismi, Arequipa, Peru

- elevation	5,170 m (16,962 ft)

Mouth - location	Atlantic Ocean, Brazil

- elevation	0 m (0 ft)

Length	6,400 km (4,000 mi) approx.

Basin	7,050,000 km2 (2,720,000 sq mi) approx.

•	The Amazon River (Portuguese: Rio Amazonas; Spanish: Río Amazonas; /ˈæməzɒn/ (US); pronounced /ˈæməzən/ (UK)) of South America is the largest river in the world by volume, with a total river flow greater than the next eight largest rivers combined. The Amazon, which has the largest drainage basin in the world, accounts for approximately one-fifth of the world's total river flow. During the wet season parts of the Amazon exceed 190 kilometers (120 mi) in width. Because of its vast dimensions, it is sometimes called The River Sea. At no point is the Amazon crossed by bridges. This is not because of its huge dimensions; in fact, for most of its length, the Amazon's width is well within the capability of modern engineers to bridge. However, the bulk of the river flows through tropical rainforest, where there are few roads and even fewer cities, so there is no need for crossings. While the Amazon is the largest river in the world by most measures, the current consensus within the geographic community holds that the Amazon is the second longest river, just slightly shorter than the Nile. •	Mississippi River The Mississippi River[2] is the second longest river in the United States,[3] with a length of 2,320 miles (3,730 km)[4] from its source in Lake Itasca in Minnesota to its mouth in the Gulf of Mexico. The Mississippi River is part of the Missouri-Mississippi river system, which is the largest river system in North America and among the largest in the world: by length (3,900 miles (6,300 km)), it is the fourth longest, and by its average discharge of 572,000 cu ft/s (16,200 m³/s), it is the tenth largest.Country	 United StatColorado River ; The Colorado River ('Aha Kwahwat in Mojave),[2] or the Red River, is a river in the southwestern United States and northwestern Mexico, approximately 2,330 km (1,450 mi) long, draining a part of the arid regions on the western slope of the Rocky Mountains. The natural course of the river flows from 25 km (16 mi) north of Grand Lake, Colorado into the Gulf of California, but the heavy use of the river as an irrigation source for the Imperial Valley has desiccated the lower course of the river in Mexico such that it no longer consistently reaches the sea.The watershed of the Colorado River covers 629,100 km2 (242,900 sq mi) in parts of six U.S. states and two Mexican provinces. Total flows of the river range from 113 m3/s (4,000 cu ft/s) in droughts to 28,000 m3/s (990,000 cu ft/s) in severe floods. With the construction of massive power dams on the lower course of the river, flows of over 2,000 m3/s (71,000 cu ft/s) are unusual. The mean flow of the river was 620 m3/s (22,000 cu ft/s) during the period between 1903-34. From 1951-80, the average flow was less than 110 m3/s (3,900 cu ft/s).[1] Historically the flow was much higher before water usage began in the basin.Nile River : The Nile is a major north-flowing river in Africa, generally regarded as the longest river in the world.[1]The Nile has two major tributaries, the White Nile and Blue Nile, the latter being the source of most of the Nile's water and fertile soil, but the former being the longer of the two. The White Nile rises in the Great Lakes region of central Africa, with the most distant source in southern Rwanda 2°16′55.92″S 29°19′52.32″E2.2822°S 29.3312°E, and flows north from there through Tanzania, Lake Victoria, Uganda and southern Sudan, while the Blue Nile starts at Lake Tana in Ethiopia  12°2′8.8″N 37°15′53.11″E12.035778°N 37.2647528°E, flowing into Sudan from the southeast. The two rivers meet near the Sudanese capital KhartoumThe northern section of the river flows almost entirely through desert, from Sudan into Egypt, a country whose civilization has depended on the river since ancient times. Most of the population of Egypt and all of its cities, with the exception of those near the coast, lie along those parts of the Nile valley north of Aswan; and nearly all the cultural and historical sites of Ancient Egypt are found along the banks of the river. The Nile ends in a large delta that empties into the Mediterranean SeaThe Iguazu River has its source in the Serra do Mar (Mountains by the Sea) in the Brazilian state of Paraná to finish over a thousand kilometers southeast at the Paraná River, in the triple border with Paraguay and Argentina. Just a few kilometers upstream, it surges over the drop of a plateau forming the Iguazu Falls.Rio Grande: The Rio Grande (known in Mexico as the Río Bravo del Norte, or simply Río Bravo) is a river that forms part of the border between the United States and Mexico. At 1,885 miles (3,034 km) long, it is the fourth-longest river system in the United States.[1] It serves as a natural boundary along the border between the American state of Texas and the Mexican states of Chihuahua, Coahuila, Nuevo León, and Tamaulipas as well as a very small stretch with fellow American state New Mexico between Doña Ana County, New Mexico and El Paso County, Texas. The river was the Texas-accepted border between Mexico and the Republic of Texas, but Mexico considered this border to be the Nueces River, which provided the excuse for the US invasion of Mexico in 1848. It has, since 1848, marked the boundary between Mexico and the United States from the twin cities of El Paso, Texas, and Ciudad Juarez, Chihuahua, to the Gulf of Mexico. As such, it was across this river that some Texas slaves fled when seeking their freedom, aided by Mexico's liberal colonization policies and its abolitionist stance.[2]The major international border crossings along the river are at Ciudad Juarez and El Paso; Presidio, Texas, and Ojinaga, Chihuahua; Laredo, Texas, and Nuevo Laredo, Tamaulipas; McAllen-Hidalgo, Texas, and Reynosa, Tamaulipas; and Brownsville, Texas, and Matamoros, Tamaulipas. Other notable border towns are the Texas/Coahuila pairings of Del Rio–Ciudad Acuña and Eagle Pass–Piedras Negras.The United States and Mexico share the water of this river under a series of agreements administered by the joint US-Mexico Boundary and Water Commission. The most notable of these treaties were signed in 1906 and 1944[3]Use of that water belonging to the United States is regulated by the Rio Grande Compact, an interstate pact between Colorado, New Mexico, and Texas. The water of the Rio Grande is over-appropriated: that is, there are more users for the water than there is water in the river. Because of both drought and overuse, the section from El Paso downstream through Ojinaga was recently tagged "The ForgotteRiver" by those wishing to bring attention to the river's deteriorated condition. [4]In the summer of 2001, a 328-foot (100-meter) wide sandbar formed at the mouth of the river, marking the first time in recorded history that the Rio Grande failed to empty into the Gulf of Mexico. The sandbar was subsequently dredged, but it re-formed almost immediately. Spring rains the following year flushed the re-formed sandbar out to sea, but it returned in the summer of 2002. As of September 2006, the river once again reaches the Gulf.he Rio Grande rises in high mountains and flows for much of its length at high elevation; El Paso is 3,762 feet (1,147 m) above sea level. In New Mexico, the river flows through the Rio Grande Rift from one sediment-filled basin to another, cutting canyons between the basins and supporting a fragile bosque ecosystem in its floodplain. From El Paso eastward the river flows through desert. Only in the sub-tropical lower Rio Grande Valley is there extensive irrigated agriculture. The river ends in a small sandy delta at the Gulf of Mexico. Due to the persistent period of dry weather, the river has only occasionally emptied into the Gulf of Mexico since 2002.[5]of years ago, the Rio Grande ended at the bottom of the Rio Grande Rift in Lake CabezaVaca, but about one million years ago, the stream was "captured" and began to flow east.he Rio Grande was designated as one of the American Heritage Rivers in 1997. The Rio Grande rises in the eastern part of the Rio Grande National Forest in the American state of Colorado. This river is formed by the joining of several streams at the base of Canby Mountain, just east of the Continental Divide. From there, it flows through the San Luis Valley, then south into the state of New Mexico and passes through Espanola, Albuquerque and Las Cruces to El Paso, Texas, where it begins to form the natural border between the United States and Mexico. A major tributary, the Río Conchos, enters at Ojinaga, Chihuahua, below El Paso, and supplies most of the water in the 1,254 miles (2,018 km) Texas border segment. Other well-known tributaries include the Pecos and the smaller Devils, which join the Rio Grande on the site of Amistad Dam. Despite its name and length, the Rio Grande is not navigable by ocean-going ships, nor are there smaller passenger boats or cargo barges using it as a route. In fact it is barely navigable at all, except by small fishing boatsColumbia River: The Columbia River is the largest river in the Pacific Northwest region of North America.[8] The river rises in the Rocky Mountains in British Columbia, Canada, flows northwest and then south into the U.S. state of Washington, then turns west to form most of the border between Washington and the state of Oregon before emptying into the Pacific Ocean. The river is 1,243 miles (2,000 km) long, and its largest tributary is the Snake River. Its drainage basin is roughly the size of France and extends into seven U.S. states and a Canadian provinceBy volume, the Columbia is the fourth-largest river in the U.S., and it has the greatest flow of any North American river draining into the Pacific. The river's heavy flow and its relatively steep gradient give it tremendous potential for the generation of electricity. The 14 hydroelectric dams on the Columbia's main stem and many more on its tributaries produce more hydroelectric power than those of any other North American river.The Columbia and its tributaries have been central to the region's culture and economy for thousands of years. They have been used for transportation since ancient times, linking the many cultural groups of the region. The river system hosts many species of anadromous fish, which migrate between freshwater habitats and the saline Pacific Ocean. These fish—especially the salmon species—provided the core subsistence for natives; in past centuries, traders from across western North America traveled to the Columbia to trade for fish the late 18th century, a private American ship became the first to enter the river from the Pacific Ocean; it was followed by a British explorer, who navigated past the Oregon Coast Range into the Willamette Valley. In the following decades, fur trading companies used the Columbia as a key transportation route. Overland explorers entered the Willamette Valley through the scenic and treacherous Columbia River Gorge, and pioneers began to settle the valley in increasing numbers, following both routes to enter it. Steamships along the river linked communities and facilitated trade; the arrival of railroads in the late 19th century, many running along the river, supplemented these links.the late 19th century, public and private sectors have heavily developed the river. The development, commonly referred to as taming or harnessing of the river, has been massive and multi-faceted. To aid ship and barge navigation, locks have been built along the lower Columbia and its tributaries, and dredging has opened, maintained, and enlarged shipping channels. Since the early 20th century, dams have been built across the river for the purposes of power generation, navigation, irrigation, and flood control. Today, a dam-impounded reservoir lies along nearly every U.S. mile of the once free-flowing river, and much of the Canadian stretch has been impounded as well. Production of nuclear power has taken place at two sites along the river. Plutonium for nuclear weapons was produced for decades at the Hanford Site, which is now the most contaminated nuclear site in the U.S. All these developments have had a tremendous impact on river environments, perhaps most notably through industrial pollution and barriers to fish migration.