Imortant rivers of the world.

River	Source	Outflow	Length (km)
Nile	Tributaries of Lake Victoria, Africa	Mediterranean Sea	6,690
Amazon	Glacier-fed lakes, Peru	Atlantic Ocean	6,296
Mississippi-Missouri- Red Rock	Source of Red Rock, Montana	Gulf of Mexico	6,240
Yangtze Kiang	Tibetan Plateau, China	China Sea	5,797
Amur-Argun	Khingan Mts., China	Tatar Strait	5,780
Ob	Altai Mts., CIS	Gulf of Ob	5,567
Yellow (Huang Ho)	Eastern part of the Kunlan Mts., west China	Gulf of Chihli	4,667
Yenisei	Tannu-Ola Mts., western Tuva, CIS	Arctic Ocean	4,506
Parana	Conference of Paranaiba and Grande Rivers	Rio de la Plata	4,498
Irtish	Altai Mts., CIS	Ob River	4,434
Congo	Confluence of Lualaba and Luapula rivers, Zaire	Atlantic Ocean	4,371
Amur	Confluence of Shilka (CIS) and Argun (Manchuria) rivers	Tatar Strait	4,352
Lena	Baikal Mts., CIS	Arctic Ocean	4,268
Mackenzie	Head of Finlay river, British Colombia, Canada	Beaufort Sea (Arctic Ocean)	4,241
Niger	Guinea	Gulf of Guinea	4,184
Mekong	Tibetan highlands	South China Sea	4,023
Mississippi	Lake Itasca, Minnesota	Gulf of Mexico	3,779
Missouri	Confluence of Jefferson, Gallatin and Madison rivers, Montana	Mississippi River	3,726
Volga	Valdai Plateau, CIS	Caspian Sea	3,687
Madeira	Confluence of Beni and Maumore rivers, Bolivia-Brazil boundary	Amazon River	3,238
Purus	Peruvian Andes	Amazon River	3,238
San Francisco	Southwest Minas Gerais, Brazil	Atlantic Ocean	3,198
Yukon	Junction of Lewes and Pelly rivers, Yukon Territory, Canada	Bering Sea	3,185
St. Lawrence	Lake Ontario	Gulf of St. Lawrence	3,058
Rio Grande	San Juan Mrs. Colorado	Gulf of Mexico	3,034
Tunguska (Lower)	North of Lake Baikal, Russia	Yenesei River	2,995
Brahmaputra	Himalayas	Ganges River	2,897
Indus	Himalayas	Arabian Sea	2,897
Danube	Black Forest, Germany	Black Sea	2,842
Euphrates	Confluence of Murat Nehri and Kara Sun rivers, Turkey	Shatt-al-Arab	2,799
Darling	Central part of Eastern Highlands, Australia	Murray River	2,736
Zambezi	11? 21’S, 24? E, Zambia	Mozambique Channel	2,736
Tocantins	Goias, Brazil	Para River	2,699
Murray	Australian Alps, New South Wales	Indian Ocean	2,589
Nelson	Head of Bow River, western Alberta, Canada	Hudson Bay	2,575
Paraguay	Mato Grosso Plateau, Brazil	Parana River	2,549
Ural	South Ural Mts., CIS	Caspian Sea	2,533
Ganges	Himalayas	Bay of Bengal	2,506
Amu Darya (Oxus)	Nicolas Range, Pamir Mts.	Aral Sea	2,414
Japura	Andes Colombia	Amazon River	2,414
Salween	Tibet, South of Kunlun Mts	Gulf of Martaban	2,414
Arkansas	Central Colorado	Mississippi River	2,348
Colorado	Grand Country, Colorado	Gulf of California	2,333
Dnieper	Valdai Hills, CIS	Black Sea	2,284
Syr Darya	Tien Shah, China / Kyrgyzstan	Aral Sea	2,206
Ohio-Allegheny	Potter Country, Pennsylvania	Mississippi River	2,102
Irrawaddy	Confluence of Nmai and Mali rivers, northeast Myanmar	Bay of Bengal	2,092
Orange	Lesotho	Atlantic Ocean	2,092
Orinoco	Serra Parima Mts., Venezuela	Atlantic Ocean	2,062
Pilcomayo	Andes Mts., Bolivia	Paraguay River	1,999
Xi Jiang (Si Kiang)	Eastern Yunnan Province, China	China Sea	1,989
Columbia	Columbia Lake, British Columbia, Canada	Pacific Ocean	1,968
Don	Tula, RSFSR, CIS	Sea of Azov	1,968
Sungari	China-North Korea boundary	Amur River	1,955
Saskatchewan	Canadian Rockey Mts.	Lake Winnipeg	1,939
Peace	Stikine Mts., British Columbia, Canada	Great Slave River	1,923
Tigris	Taurus Mts. Turkey	Shatt-al-Arab	1,899
Rhine	Confluence of Hinterrhein and Vorderrhein rivers, Switzerland	North Sea	1,320