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Amazon–Ucayali–Tambo–Ene–Apurímac.
Amazon–Ucayali–Tambo–Ene–Apurímac is the largest river by drainage area in the world at 7,050,000 km2.
The river system, from Amazon River to Ucayali to Tambo to Ene and Apurímac river, is the longest river system in South America at 6,992km (4,344 miles), with its drainage area spreading across the width of the South American continent at an area of 7 million square kilometers (largest drainage basin in the world!). The Amazon river system is also the second longest in the world, with the Nile River system pipping slightly ahead at 7,088km.In terms of discharge volume, the Amazon river system is the largest in the world, discharging at 209,000 cubic meters per second onto the Atlantic Ocean.
Congo–Chambeshi (Zaïre) is the 2nd largest river by drainage area in the world at 3,680,000 km2.
Congo–Chambeshi (Zaïre) is a river that is 4,700 kilometers (or 2,920 miles) long and drains from a 3,680,000 km2 drainage basin in Democratic Republic of the Congo, Central African Republic, Angola, Republic of the Congo, Tanzania, Cameroon, Zambia, Burundi and Rwanda.
Its average discharge rate is 41,800 m3/3 and the river flows out into Atlantic Ocean.
São Francisco is a 3,180-km long (1,976 miles) river that drains from a 610,000-km2 wide basin in Brazil.
Its average discharge rate is 3,300 m3/3 and the river flows out into Atlantic Ocean.
Orinoco is the 3rd largest river by average discharge rate in the world at 33,000 m3/s.
Orinoco is a 2,101-km long (1,306 miles) river that drains from a 1,380,000-km2 wide basin in Venezuela, Colombia and Guyana.
Orinoco discharges at 33,000 m3/3 and flows out into Atlantic Ocean.
The Orinoco River is also known as Orinoquia.
Compare Orinoco with Paraguay (Rio Paraguay) from South America.
Located in South Africa, Namibia, Botswana and Lesotho, Orange has a length of 2,092 kilometers (1,300 miles).
Senegal is a river that stretches 1,641 kilometers (or 1,020 miles) in length, draining from a 419,659 km2 basin in Guinea, Senegal, Mali and Mauritania.
Compare Senegal with Nile–White Nile–Kagera–Nyabarongo–Mwogo–Rukarara from Africa.
Uruguay is a river that is 1,610 kilometers (or 1,000 miles) long and drains from a 370,000 km2 drainage basin in Uruguay, Argentina and Brazil.
Compare Uruguay with Río Grande (Guapay) from South America.
Draining from an area as wide as 223,856 km2 in Gabon and Republic of the Congo, Ogooué (or Ogowe) has a length of 1,200 kilometers (746 miles).
Ogooué (or Ogowe) discharges at 4,706 m3/3 and flows out into Atlantic Ocean.
Gambia is a river that stretches 1,094 kilometers (or 680 miles) in length and is located in The Gambia, Senegal and Guinea.
More on the longest and largest river systems in the world:
World: Longest | Largest by Discharge Volume | Largest by Drainage Area
By Country: Australia | Brazil | Canada | China | France | Russia | UK | USA
Europe: Longest | Largest by Discharge Volume | Largest by Drainage Area
Asia: Longest | Largest by Discharge Volume | Largest by Drainage Area
Africa: Longest | Largest by Discharge Volume | Largest by Drainage Area
Oceania: Longest | Largest by Discharge Volume | Largest by Drainage Area
North America: Longest | Largest by Discharge Volume | Largest by Drainage Area
South America: Longest | Largest by Discharge Volume | Largest by Drainage Area
Outflows: Amazon River | Atlantic Ocean | Black Sea | Mississippi River | Pacific Ocean