80 terms

River Borders Worldewide

Amu Darya
də Āmu Sind,
Amu River
In ancient times, the river was regarded as the boundary between Greater Iran and Turan.
Name origin: Named for city of Āmul (now Turkmenabat)
Countries:Afghanistan, Tajikistan, Turkmenistan, Uzbekistan - Region:Central Asia
- left Panj River
- right Vakhsh River, Surkhan Darya, Sherabad River, Zeravshan River
Primary source: Pamir River/Panj River - location: Lake Zorkul,
Pamir Mountains, Tajikistan
Secondary source: Kyzyl-Suu/Vakhsh River - location: Alay Valley, Pamir Mountains, Kyrgyzstan
Source confluence: Kerki
Mouth Aral Sea - location: Amudarya Delta, Uzbekistan
Length 2,400 km (1,491 mi)
Amur River
Sahaliyan Ula (Manchu)
Heilong Jiang (Chinese)
Аму́р / Amur (Russian)
The Chinese-Russian border or the Sino-Russian border is the international border between China and Russia. It is the world's sixth-longest international border It starts at the eastern China-Mongolia-Russia tripoint and runs north-east, followed by south-east along the Argun and Amur rivers, and finally south-west along the Tumen River to the border with North Korea at, only a few kilometres before the river flows into the Pacific Ocean
Name origin: Mongolian: amur, "rest")
Countries: Russia, China
Tributaries : Part of Strait of Tartary
- left Shilka, Zeya, Bureya, Amgun
- right Ergune, Huma, Songhua, Ussuri
Cities: Blagoveschensk, Heihe, Tongjiang, Khabarovsk, Amursk, Komsomolsk-on-Amur, Nikolayevsk-on-Amur
Primary source: Onon River-Shilka River- location: Khan Khentii Strictly Protected Area, Khentti Province, Mongolia
Secondary source: Kherlen River-Ergune River - location: about 195 kilometres (121 mi) from Ulaanbaatar, Khentii Province, Mongolia
Source confluence - location: Near Pokrovka, Russia & China
Mouth: Strait of Tartary- location: Near Nikolaevsk-on-Amur, Khabarovsk Krai, Russia
Length 2,824 km (1,755 mi)
(Northern Sami: Anárjohka,
Norwegian: Anarjokka or Anarjohka, Finnish: Inarijoki,
Swedish: Enare älv)
It is a land and river border between two tripoints. The western tripoint is Treriksröset on the Swedish border. The eastern tripoint is on Muotkavaara on the Russian border. Almost half of the border follows the rivers Anarjohka and Tana.
Origin: Øvre Anárjohka National Park
Mouth: Tana River (a tributary of Tana River)
Basin countries: Finland, Norway
Left tributaries: Iškorasjohka, Goššjohka, Ássuorgi, Cáskinjohka
Right tributaries: Karigasjoki, Skiehččanjohka
Atabapo River
Near San Fernando de Atabapo, the Atabapo and Guaviare rivers join the Orinoco, marking the end of the upper Orinoco. Downstream from San Fernando de Atabapo, the river flows northward and forms part of the border between Venezuela and Colombia.
Basin countries:Venezuela (part of the Orinoco River basin.)
From the Guiana Highlands:
Atabapo Caroní Caura Ventuari
Mouth: Orinoco River
Atrek River
A fast-moving river which begins in the mountains of northeastern Iran (mountains of Khorasan), and flows 563 kilometres (350 mi) westward ( along the borders of Persia and the Russian possessions) draining into the southeastern corner of the Caspian Sea in Turkmenistan, a short distance to the north of Ashurada. Because of the high use of its waters for irrigation, it only flows into the Caspian when it is in flood stage.
Beginning where its tributary the Sumbar join it, the river forms the border of Iran with Turkmenistan; this helped keep the area closed throughout the Cold War years.
Bermejo River
Spanish: Río Bermejo
It forms part of the international boundary between Argentina and Bolivia.
In the plains of Argentina's Gran Chaco the Bermejo forms wetlands and splits into two branches. The southern branch is the bed of the old Bermejo River, now an intermittent stream called Río Bermejito. The northern branch is now the main stem of the Bermejo and is called the Teuco River (Río Teuco), Bermejo Nuevo, or simply the Bermejo River. The two branches rejoin near Villa Río Bermejito, forming the Lower Bermejo River.
The river is born in a mountain range known as Sierra de Santa Victoria around near Tarija, a few kilometres southeast of Chaguaya in Bolivia.
The Teuco follows its course to finality and into the Paraguay River, in front of the city of Pilar, in Paraguay.
Note: the upper part of the Desaguadero River is sometimes also called the Bermejo.
Bug River
Polish: Bug
Ukrainian: Zakhidnyy Buh
Belarusian: akhodni Buhm
A tributary of the Narew River, the Bug forms part of the border between Ukraine and Poland for 185 kilometres (115 mi), and between Belarus and Poland for 178 kilometres (111 mi), and is the fourth longest Polish river.
Countries: Poland, Belarus, Ukraine- Voivodeship Podlaskie, Mazovian, Lublin, Voblast Brest, Oblast Lviv
Source : - location: near Verkhobuzh, Lviv Oblast, Ukraine
Mouth - location: Narew River near Serock, Poland
Length 772 km (480 mi)
Discharge -Serock
Discharge elsewhere - Wyszkow
Left bank Tributaries: Poltva, Bukowa, Huczwa, Uherka, Włodawka, Krzna, Toczna, Liwiec, Kałamanka, Janów Podlaski, Uherka,
Right bank Tributaries: Sołokija, Ług, Mukhavets, Leśna (Leśna Prawa, Leśna Lewa), Nurzec, Brok, Warenzhanka

Bug River is a left tributary of the Narew river which flows from central Ukraine to the west, passing along the Ukraine-Polish and Polish-Belarusian border and into Poland, where it follows part of the border between the Masovian and Podlaskie Voivodeships. It joins the Narew river at Serock, a few kilometers upstream of the artificial Zegrze Lake.
It is connected with the Dnieper River via the Mukhavets River, a right-bank tributary, by the Dnieper-Bug Canal.
On the Bug River, a few kilometers from the Vysokaye in Kamenets District of the Brest Region, is the westernmost point of Belarus.
The Čabranka is a small river on the border between Slovenia and Croatia. It is 17.5 kilometres (10.9 mi) long and is a left tributary of the Kupa River (Croatian: Kupa, Slovene: Kolpa).[1] Its source is just west of the settlement of Podplanina in the Municipality of Loški Potok in southern Slovenia and just north of the Croatian village of Čabar, from which it gets its name.[2] It joins the Kupa at Osilnica.
Chu River
(Shu or Chui, Chuy)
Countries Kazakhstan, Kyrgyzstan
- left: Ala-Archa River, Kara-Balta River, Ysyk-Ata River, Alamudun River, Ak-Suu River
- right: Chong-Kemin River, Kichi-Kemin River
Source: confluence of Joon Aryk and Kochkor River (in Kochkor District of Naryn Province)
Mouth: Akjaykyn system of lakes
As the Chu flows through the Chuy Valley, it forms the border between Kyrgyzstan and Kazakhstan for more than a hundred kilometers, but then it leaves Kyrgyzstan and flows into Kazakhstan, where, like many other rivers and streams that drain northern Kyrgyzstan it eventually disappears in the steppe, short of reaching the Syr Darya, into which it would drain in wet years.
A river in northern Kyrgyzstan and southern Kazakhstan. At approximately 663 miles (1067 km) in length, it is one of the longest rivers in Kyrgyzstan. Chuy Oblast, the northernmost and most populous administrative region of Kyrgyzstan.
Colorado River
Lake Mead on the Arizona-Nevada line- Arizona-Nevada and Arizona-California borders.
Countries: United States, Mexico
States: Colorado, Utah, Arizona, Nevada, California (U.S.), Baja California (Mexico), Sonora
- left: Fraser River, Blue River, Eagle River, Roaring Fork River, Gunnison River, Dolores River, San Juan River, Little Colorado River, Bill Williams River, Gila River
- right: Green River, Dirty Devil River, Escalante River, Kanab River, Virgin River
Cities: Glenwood Springs, CO, Grand Junction, CO, Moab, UT, Page, AZ, Bullhead City, AZ, Lake Havasu City, AZ, Yuma, AZ (U.S.), San Luis Rio Colorado, SON (Mexico)
Source: La Poudre Pass - location: Rocky Mountains, Colorado, United States
Mouth: Gulf of California-location: Colorado River Delta, Baja California-Sonora, Mexico
Length 1,450 mi (2,334 km)
Congo River
Le fleuve Zaïre
Border between Dem. Rep. of the Congo and Rep. of the Congo
Countries Angola, Burundi, Cameroon, Central African Republic, Congo-Kinshasa, Gabon, Congo-Brazzaville, Rwanda, Tanzania, Zambia
Source: of the Congo are in the highlands and mountains of the East African Rift, as well as Lake Tanganyika and Lake Mweru, (which feed the Lualaba River, which then becomes the Congo below Boyoma Falls.) The Chambeshi River in Zambia is generally taken as the source of the Congo in line with the accepted practice worldwide of using the longest tributary, as with the Nile River.
Mouth: Atlantic Ocean
Length 4,700 km (2,920 mi)
Tributaries: Sorted in order from the mouth heading upstream.
Lower Congo : Downstream of Kinshasa, there are no important tributaries. Inkisi
Middle Congo: Kwa-Kassai (left) - Fimi,(Lukenie), Kwango, Sankuru, Lefini (right), Sangha (right) - (Kadéï),Ubangi/ (right) -(Mbomou, Uele), Tshuapa River (left) -,Lomami River (left) -
Upper Congo: Upstream of Boyoma Falls near Kisangani, the river Congo is known as the Lualaba River. :Luvua, (Luapula), Chambeshi
The river and its tributaries flow through the Congo rainforest, the second largest rain forest area in the world, second only to the Amazon Rainforest in South America. The river also has the second-largest flow in the world, behind the Amazon; the third-largest drainage basin of any river, behind the Amazon and Plate rivers; and is one of the deepest rivers in the world, at depths greater than 220 m (720 ft).Because its drainage basin includes areas both north and south of the equator, its flow is stable, as there is always at least one part of the river experiencing a rainy season
Cuiari River
Origin Amazonas state- state of Brazil, located in the northwestern corner of the country. It is the largest Brazilian State by area and the 9th largest country subdivision in the world.
Basin countries Brazil
Cuyuni River
Border between Venezuela and Guyana The Cuyuni River is a South American river and a tributary of the Essequibo River. It rises in the Guiana Highlands of Venezuela where it descends northward to El Dorado, and turns eastward to meander through the tropical rain forests of Guayana Esequiba. It finally turns southeastward, flowing to its confluence with the Mazaruni River.
The Cuyuni River marks the limit of the disputed territory of Guayana Esequiba( is a territory administered by Guyana but claimed by Venezuela) for approximately 100 km (62 mi).
The river is a source of alluvial gold.
Ankoko Island is at the confluence of the Cuyuni and Wenamu River and has been the subject of further disputes between Venezuela and Guyana.
Countries: Germany, Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria, Romania, Moldova, Ukraine
Cities: Ulm, Ingolstadt, Regensburg, Linz, Vienna, Bratislava, Győr, Budapest, Dunaújváros, Vukovar, Novi Sad, Zemun, Pančevo, Belgrade, Drobeta Turnu-Severin, Vidin
Primary source: Breg - location: Martinskapelle, Black Forest, Germany - length 2,860 km (1,777 mi)
Secondary source: Brigach - location: St. Georgen, Black Forest, Germany - length 2,860 km (1,777 mi)
Source confluence: - location: it originates in the town of Donaueschingen—which is in the Black Forest of Germany—at the confluence of the rivers Brigach and Breg.
Mouth - Danube Delta- emptying into the Black Sea via the Danube Delta in Romania and Ukraine
Length 2,860 km (1,777 mi)
Discharge elsewhere (average) - Passau - 30km before town - Vienna - Budapest- Belgrade
List of Tributaries:
1. Iller (entering at Ulm) 2. Lech 3. Altmühl (entering at Kelheim) 4. Naab (entering at Regensburg) 5. Regen (entering at Regensburg) 6. Isar 7. Inn (entering at Passau) 8. Enns 9. Morava (entering near Devín Castle) 10. Rába (entering at Győr) 11. Váh (entering at Komárno) 12. Hron (entering at Štúrovo) 13. Ipeľ 14. Sió 15. Dráva 16. Vuka (entering at Vukovar) 17. Tisza 18. Sava (entering at Belgrade) 19. Timiș (entering at Pančevo) 20. Great Morava 21. Caraș 22. Jiu (entering at Bechet) 23. Iskar 24. Olt (entering at Turnu Măgurele) 25. Osam 28. Argeș (entering at Oltenița) 29. Ialomița 30. Siret (entering near Galați) 31. Prut (entering near Galați)
Detroit River
Detroit River is a strait in the Great Lakes system.[2] The name comes from the French Rivière du Détroit, which translates literally as River of the Strait.
Countries: United States, Canada
State: Michigan & Province: Ontario
- left: Little River, River Canard
- right: River Rouge, Ecorse River
Cities: United States: Detroit, Grosse Pointe Park, River Rouge, Ecorse, Wyandotte, Riverview, Trenton, Grosse Ile, Gibraltar, Canada: Tecumseh, Windsor, La Salle, Amherstburg
Source:Lake St. Clair
Mouth: Lake Erie
Length 28 mi (45 km)
Drava River
Drau, Drave, Dráva
Countries: Italy, Austria, Slovenia, Croatia, Hungary
- left: Wąsawa
The Gail in Austria, the Meža and Dravinja in Slovenia, and the Bednja in Croatia from the south, as well as the Gurk and the Lavant in Austria, and the Mur (near Legrad) in Croatia from the north are its main tributaries.
Cities: Lienz, Spittal an der Drau, Villach, Ferlach, Dravograd, Vuzenica, Muta, Ruše, Maribor, Ptuj, Ormož, Varaždin, Osijek, Barcs
Source: North of the Neunerkogel over the Toblacher Feld - location: Toblach, South Tyrol, Italy. The Drava (along with one of its tributaries the Slizza) and the Spöl are the only two rivers originating in Italy that belong to the Danube drainage basin. It is the fourth longest Danube tributary.
Mouth: Danube near Osijek
Length 707 km (439 mi)
Dunajec River
The Dunajec is a river running through southern Poland. It is the right tributary of the Vistula River.
It begins in Nowy Targ at the junction of two short mountain rivers, Czarny Dunajec and Biały Dunajec (Black and White Dunajec).
Dunajec forms a border between Poland and Slovakia for 27 kilometers in the Pieniny Środkowe (Slovak: Centrálne Pieniny) range, east of the Czorsztyn reservoir.
Dunajec flows into the Vistula River in the vicinity of Opatowiec.
It is the only river taking waters from the Slovak territory to the Baltic Sea.
Argun River
Ergune (Ergune bira)
Argun River
The Ergune marks the border (established by the Treaty of Nerchinsk in 1689) between Russia and China for about 944 kilometres (587 mi), until it meets the Amur River.
Name origin: Mongolian: ergene, "contrarotation"
Countries:China, Russia- Russian : Krai Zabaykalsky Krai- Chinese Region: Inner Mongolia
Source: Kherlen River - location: about 195 kilometres (121 mi) from Ulaanbaatar
The river flows from the Western slope of the Greater Khingan Range in Inner Mongolia. Its confluence with Shilka River at Ust-Strelka forms the Amur River.
Mouth: Amur river
Length 1,620 km (1,007 mi)
Ganges River
A trans-boundary river of Asia which flows through India and Bangladesh
Countries: India, Bangladesh
States: Uttarakhand, Uttar Pradesh, Bihar, Jharkhand, West Bengal
- left: Ramganga, Gomti, Ghaghara, Gandaki, Burhi Gandak, Koshi, Mahananda
- right: Yamuna, Tamsa, Son, Punpun, Betwa, Chambal, Tons, Ken, Sindh, Hindon, Sharda
Cities: Haridwar, Kanpur, Jajmau, Allahabad, Varanasi, Mirzapur, Ghazipur, Patna, Rishikesh, Munger, Bhagalpur, Baharampur, Kolkata, Bijnor
Source: Gangotri Glacier, Satopanth Glacier, Khatling Glacier, and waters from melted snow from such peaks as Nanda Devi, Trisul, Kedarnath, Nanda Kot, and Kamet. - location: Uttarakhand, India
The Ganges begins at the confluence of the Bhagirathi (which rises at the foot of Gangotri Glacier, at Gaumukh) and Alaknanda rivers at Devprayag. The six headstreams are the Alaknanda, Dhauliganga, Nandakini, Pindar, Mandakini, and Bhagirathi rivers.
Mouth: Ganges Delta - location: Bay of Bengal, Bangladesh & India
Length 2,525 km (1,569 mi)
Discharge: for Farakka Barrage
Discharge elsewhere (average) - Bay of Bengal
It is the third largest river by discharge.
The Ganges was ranked as the fifth most polluted river of the world in 2007.
Río Grande de Tarija
Río Tarija
Tarija River
The Río Grande de Tarija is a river of Argentina and Bolivia.[1] It is a tributary of the Bermejo River. It is also known as the Río Tarija and the Tarija River.
Source: confluence du río Itaú et du río Tarija
Mouth: Bermejo River - location: à Las Puntas de San Antonio
Basin countries: Argentina, Bolivia
Guaporé River
Iténez River
Countries Bolivia(Iténez River), Brazil(Guaporé River)
- left: Alegre River, Verde River, Paragúa River, Río Blanco, Machupo River
- right: Guatire River, Branco River, Corumbiara River, Colorado River, Massaco River, Cabixi River
Source: Parecis plateau - location: Mato Grosso, Brazil
Mouth: Mamoré River - location: Brazil/Bolivia--part of the Madeira River basin, which eventually empties into the Amazon River. The Guaporé River crosses the eastern part of the Beni savanna region
Length 1,210 km (750 mi)
Içana River
Isana River
Countries Brazil, Colombia
Source : - location: Guaviare Department, Colombia, also know as Isana
It flows east and forms a short part of the international boundary between Colombia and Brazil.
Mouth: Río Negro ( In Amazonas state, where it is known as the Içana, it flows southeast and into the Rio Negro at São Joaquim, Amazonas)
Length 580 km (360 mi)
Iguazú River
Río Iguazú,
Iguassu River
Countries Brazil, Argentina
Part of Paraná River basin
- left Rio Negro (Iguazu), Rio Xopim
- right Rio de Areia
Cities Curitiba, Campo Largo, Paraná, Foz do Iguaçu
Landmark Iguazu Falls
Source: Serra do Mar costal mountains - location: Near Curitiba, Paraná, Brazil
Mouth: Paraná River - location: Foz do Iguaçu, Misiones Province and Paraná, border between Argentina and Brazil
It empties into the Paraná River at the point where the borders of Argentina, Brazil, and Paraguay join, an area known as the Triple Frontier.
Length 1,320 km (820 mi), East-west
Jordan River
Hebrew:Nahar haYarden;
Arabic: Nahr al-Urdu
Israel and Palestine border the river to the west, while the Golan Heights and Jordan lie to its east.
Name origin: Hebrew: (yardén, descender)(yarad, to descend)
Country Israel, Jordan, Palestine
Regions West Asia, Eastern Mediterranean littoral
District Galilee
- left Banias River, Dan River, Yarmouk River, Zarqa River
- right Hasbani or Snir River (Lebanon and Israel), Iyon/Ayun Stream (Lebanon and Israel)
Landmarks Sea of Galilee, Dead Sea
Source : - location; Anti-Lebanon Mountain Range at Mount Hermon, Golan Heights
Mouth: Dead Sea
Length 251 km (156 mi)
The river has a major significance in Judaism and Christianity and, to a more moderate degree, Islam, as the site where the Israelites crossed into the Promised Land and where Jesus of Nazareth was baptised by John the Baptist.
The streams coming together to create the River Jordan in its upper basin are, west to east:
1. The Ayun which flows from Lebanon.
2. The Hasbani which flows from Mount Lebanon.
3. The Dan whose source is also at the base of Mount Hermon.
4. The Banias arising from a spring at Banias at the foot of Mount Hermon.
South of the Sea of Galilee it receives the waters of further tributaries, the main ones being:The Yarmouk River, The Zarqa River
Kasai River
Cassai River
The Kasai River (called Cassai in Angola) is a tributary of the Congo River, located in central Africa.[1] The river begins in Angola and serves as the border between Angola and the Democratic Republic of the Congo (DRC), then flows into the DRC, where it joins the Congo at Kwamouth northeast of Kinshasa. The Kasai's tributaries include the Fimi, Kwango, and Sankuru rivers. The short stretch of the Kasai from the inflow of the Fimi to the Congo is known as the Kwah River. The Kasai watershed consists mainly of equatorial rainforest areas, which provide an agricultural land in a region noted for its infertile, sandy soil. It is a tributry of Congo river and diamonds are found in this river. Around 60% of diamonds in Belgium go from Kasai river for cutting and shaping.
Kong River
Kong River is also the Thai name for the Mekong River
Cong River (sông Công) is a river in North East Vietnam
The Kong River (Lao: Se Kong, (Khmer:(official) or (Khmerization)), Vietnamese: sông Sê Kông) is a river in Southeast Asia. The river originates in Thừa Thiên-Huế Province in Central Vietnam and flows 480 kilometres (300 mi) through southern Laos and eastern Cambodia. It joins the Mekong River near Stung Treng town of Cambodia. Part of its course forms the international boundary between Laos and Cambodia.
The Kupa (Croatian) or Kolpa (Slovene, from Latin: Colapis in Roman times) river, a right tributary of the Sava, forms a natural border between north-west Croatia and southeast Slovenia. It is 297 kilometres (185 miles) long,[1] with its border part having a length of 118 km (73 mi)[2] and the rest located in Croatia
Origin: Razloge, in the mountainous region of Gorski Kotar, northeast of Rijeka, in the area of Risnjak National Park, Croatia
Mouth: Sava River, Sisak (town), Croatia
Basin countries: Croatia, Slovenia
Length 297 km (185 mi)
Kwango River
Rio Cuango
The Cuango or Kwango (Portuguese: Rio Cuango) is a transboundary river of Angola and Democratic Republic of Congo. It is the largest left bank tributary of the Kasai River in the Congo River basin.[1][2] It flows through Malanje town in Angola. The Kwango River basin has large resources of diamonds in the Chitamba-Lulo Kimberlite Cluster in Lunda Norte Province, discovered in the main river channel and on flats and terraces in its flood plains.
Countries: Angola, Democratic Republic of Congo- Part of Cuango
Source Alto Chicapa- in the Angolan province of Lunda Sul
Mouth At Bandundu into Kasai River in Congo River basin
Length 1,100 mi (1,770 km)
Limpopo River
Vhembe River
It serves as a border for about 640 km (398 mi), separating South Africa to the southeast from Botswana to the northwest and Zimbabwe to the north.
Countries: South Africa, Botswana, Zimbabwe, Mozambique
Source: confluence Marico and Crocodile - location: Botswana/South Africa border
Mouth: Indian Ocean - location; Gaza Province, Mozambique
Length 1,750 km (1,087 mi)
The Limpopo is the second largest river in Africa that drains to the Indian Ocean, after the Zambezi River.
The first European to sight the river was Vasco da Gama, who anchored off its mouth in 1498 and named it Espiritu Santo River.
The Notwane River is a major tributary of the Limpopo, rising on the edge of the Kalahari Desert in Botswana and flowing in a north-easterly direction.
In the north-eastern corner of South Africa the river borders the Kruger National Park.
Left hand: Notwane River, Bonwapitse River, Mahalapswe River, Lotsane River, Motloutse River, Shashe River, Umzingwani River, Bubi River, Mwenezi River, Changane River
Right hand: Marico River, Crocodile River, Matlabas River, Mokolo River, Palala River, Mogalakwena River, Kolope River, Sand River (Limpopo), Nwanedi River, Luvuvhu River, Olifants River (Limpopo)
Luapula River
The Luapula River is a section of Africa's second-longest river, the Congo.
It is a transnational river forming for nearly all its length part of the border between Zambia and the DR Congo.
It joins Lake Bangweulu (wholly in Zambia) to Lake Mweru (shared between the two countries) and gives its name to the Luapula Province of Zambia. The Luapula drains Lake Bangweulu and its swamps into which flows the Chambeshi River, the source of the Congo.
Lusatian Neisse
According to the 1945 Potsdam Agreement in the aftermath of World War II, the river became part of the Polish western border with Germany (the Oder-Neisse line).
Countries: Czech Republic, Poland, Germany
Source: Jizera Mountains - location: Nová Ves nad Nisou, Liberec Region, Czech Republic
Mouth: a left-bank tributary of the river Oder - location: Neißemünde, Brandenburg, Germany
Right bank: Lubsza
Left bank: Mandau
Length 252 km (157 mi)
At Bad Muskau the Neisse flows through Muskau Park, a UNESCO World Heritage Site.
Macará River
The Macará River forms part of the border between Ecuador and Peru
Maputo River
(Great Usutu)
Lusutfu or Suthu River
The river rises near Amsterdam, Mpumalanga, South Africa, and flows through Swaziland in an easterly direction, where it enters the Lebombo Mountains. The 13-kilometre gorge forms the boundary between Swaziland and South Africa. For approximately twenty kilometres, it forms the border between South Africa (province of KwaZulu-Natal) and Mozambique.
Countries: South Africa, Swaziland, Mozambique
Source: - location: Amsterdam, Mpumalanga, South Africa
Mouth: Indian Ocean - location: Maputo Province, Mozambique ( in the Ndumo Game Reserve, it absorbs its largest tributary, the Pongola River. It then meanders through the Mozambican coastal plain and empties into southern Maputo Bay, some 85 kilometres downstream.)
From the origin to its mouth, in order, tributaries are the: Seganagana, Bonnie Brook, Mpuluzi, Buhlungu, Umvenvane, Lusushwana, Sidvokodvo, Mhlamani, Mzimneni, Mzimphofu, Mhlathuzane, Mtsindzekwa, Mhlatuze, Nyetane, Funuane, and the Pongola Rivers.
Mbomou River
(also spelled M'bomou in French)
The Mbomou River or Bomu (also spelled M'bomou in French) forms part of the boundary between the Central African Republic (CAR) and the Democratic Republic of the Congo (DRC).
The Mbomou merges with the Uele River to form the Ubangi River. The Ubangi, a tributary of the Congo, also serves as part of the border between the CAR and the DRC.
Mekong River
Megaung Myit, (Maenam Khong),
Tonle Thom ,
Cửu Long,
Mê Kông, (Méigōng)
The Mekong then meets the tripoint of China, Burma (Myanmar) and Laos. From there it flows southwest and forms the border of Burma and Laos for about 100 km (62 mi) until it arrives at the tripoint of Burma, Laos, and Thailand. This is also the point of confluence between the Ruak River (which follows the Thai-Burma border) and the Mekong. The area of this tripoint is sometimes termed the Golden Triangle, although the term also refers to the much larger area of those three countries that is notorious as a drug producing region.
Countries: China, Burma, Laos, Thailand, Cambodia, Vietnam
- left: Nam Khan, Tha, Nam Ou
- right: Mun, Tonle Sap, Kok, Ruak
Source: Lasagongma Spring - location: Mt. Guozongmucha, Zadoi, Yushu Tibetan Autonomous Prefecture, Qinghai, China
Mouth: Mekong Delta
Discharge:for South China Sea
Length 4,350 km (2,703 mi)
The Mekong rises as the Za Qu and soon becomes known as the Lancang (Lantsang) in the "Three Rivers Source Area" on the Tibetan Plateau in the Sanjiangyuan National Nature Reserve; the reserve protects the headwaters of, from north to south, the Yellow (Huang He), the Mekong, and the Yangtze Rivers.
Three Parallel Rivers Area in the Hengduan Mountains, along with the Yangtze to its east and the Salween River (Nujiang in Chinese) to its west.
Meta River
Origin: It is formed in the Meta Department, Colombia by the confluence of the Humea, Guatiquía and Guayuriba rivers.
Mouth: Orinoco at Puerto Carreño, Venezuela
The major tributaries of the Meta are the Cravo Sur, the Casanare, the Cusiana, the Upía and the Manacacías.
Basin countries Colombia, Venezuela
Length 804 kilometres (500 mi)
It flows east-northeastward across the Llanos Orientales plains of Colombia through an ancient fault.
Moei River
Thaungyin River
The Moei River forms the natural border line between Thailand and Burma.
Countries: Thailand, Burma
States: Tak Province, Mae Hong Son Province
Districts: Phop Phra, Mae Sot, Mae Ramat, Tha Song Yang, Sop Moei
Tributaries - right: Yuam River
City: Mae Sot
Source: - location: Thanon Thongchai Range, Tak Province, Thailand
Mouth: Salween River: - location: Sop Moei, Mae Hong Son Province, Thailand
Length 327 km (203 mi)
Unlike most rivers in Thailand the Moei River flows north in a northwest direction.
The river banks often the scenario of clashes between the Tatmadaw and Karen militias.
Muonio River
Muonio älv,
The Muonio (Finnish: Muonionjoki; Swedish: Muonio älv) is a river in northern Finland and Sweden. It is a tributary of the Tornio. Together the two rivers form the national border between Finland and Sweden. The river is 230 kilometres long.
Countries: Sweden, Finland
Mouth: Torne River
Length 387 km (240 mi)
Naf River
Naf River is a river that starts in Myanmar and flows into the Bay of Bengal. The lower part of the river marks the border of Bangladesh and Myanmar. It starts in the Arakan hills
Historically, Shapuree Island located at the mouth of the river, plays an important role and is considered as one of the immediate causes for the first Anglo-Burmese War.
Natisone River
The Natisone (Latin: Natiso; Friulian: Nadison; Slovene: Nadiža) is a 60-kilometre (37 mi) river in Slovenia and Italy.[1] It flows for some time as a border river between Slovenia and Italy, continues in Slovenia and then crosses the border and continues in Eastern Friuli, in northeastern Italy. It is the main tributary of the Torre and a sub-affluent of the Isonzo.
The Natisone is formed at 415 metres (1,362 ft) above sea level on the border between Friuli and Slovenia by the confluence of two streams: the Rio Bianco (Slovene: Beli potok) and the Rio Nero (Slovene: Črni potok) which spring from the Punta di Montemaggiore and Gabrovec mountains.
Niagara River
It forms part of the border between the Province of Ontario in Canada (on the west) and New York State in the United States.
Origin Lake Erie
Mouth Lake Ontario
Basin countries United States & Canada
Length 58 kilometres (36 mi)[
Oder (Odra)
The Oder (Czech and Polish: Odra) is a river in Central Europe. It rises in the Czech Republic and flows (generally north- and northwest-ward) through western Poland, later forming 187 kilometres (116 mi) of the border between Poland and Germany, part of the Oder-Neisse line. The river ultimately flows into the Szczecin Lagoon north of Szczecin and then into three branches (the Dziwna, Świna and Peene) that empty into the Gulf of Pomerania of the Baltic Sea.
Countries: Czech Republic, Poland, Germany
Source: - location: Fidlův kopec, Oderské vrchy, Nízký Jeseník, Olomouc District, Olomouc Region, Moravia, Czech Republic
Mouth: Szczecin Lagoon - location: Baltic Sea, Poland
Length 854 km (531 mi)
Okavango River
It begins in Angola, where it is known as the Cubango River. Further south it forms part of the border between Angola and Namibia, and then flows into Botswana, draining into the Moremi Game Reserve.
Countries: Angola, Namibia, Botswana
Mouth: - location: Moremi Game Reserve, Botswana
Length 1,700 km (1,056 mi)
Orinoco River
Río Orinoco
Countries: Venezuela, Colombia
Source: - location: Cerro Delgado-Chalbaud, Parima Mountains, Venezuela (near the Venezuelan-Brazilian border)
Mouth: Delta Amacuro: - location:Atlantic Ocean, Venezuela
Length 2,140 km (1,330 mi)
The course of the Orinoco forms a wide ellipsoidal arc, surrounding the Guiana Shield; it is divided in four stretches of unequal length that roughly correspond to the longitudinal zonation of a typical large river:
Upper Orinoco— 242km (150 mi) long, from its headwaters to the rapids Raudales de Guaharibos, flows through mountainous landscape in a northwesterly direction
Middle Orinoco— 750 km(470 mi) long, divided into two sectors, the first of which ca. 480km (300 mi) long has a general westward direction down to the confluence with the Atabapo and Guaviare rivers at San Fernando de Atabapo; the second flows northward, for about 270 km (170 mi), along the Venezuelan - Colombian border, flanked on both sides by the westernmost granitic upwellings of the Guiana Shield which impede the development of a flood plain, to the Atures rapids near the confluence with the Meta River at Puerto Carreño,
Lower Orinoco— 959km(596 mi) long with a well-developed alluvial plain, flows in a northeast direction, from Atures rapids down to Piacoa in front of Barrancas
Delta Amacuro— 200km(120 mi) long that empties into the Gulf of Paría and the Atlantic Ocean, a very large delta, 370 kilometres (230 mi) at its widest.
Padma River
Origin: Himalayas (The Ganges originates in the Gangotri Glacier of the Himalaya)
Mouth: Bay of Bengal(It is the main distributary of the Ganges, flowing generally southeast for 120 kilometres (75 mi) to its confluence with the Meghna River near the Bay of Bengal.)
Basin countries India, Bangladesh
Location: Nawabganj, Rajshahi, Pabna, Kushtia, Faridpur, Rajbari, and Chandpur District
Length 120 kilometres (75 mi)[1]
Pamir River
The Pamir forms the boundary between Tajikistan and Afghanistan along its entire length.
The Pamir is a river in Tajikistan and Afghanistan.
It is a tributary of the Panj River, and forms the northern boundary of Wakhan.
The river has its sources in the Pamir Mountains in Gorno-Badakhshan province in the far eastern part of Tajikistan.
It flows between the Wakhan Range (south) and the Southern Alichur Range(north).
It starts from the Lake Zorkul. Near the town of Langar, it joins the Wakhan River and forms the Panj River.
Panj River
forms a considerable part of the Afghanistan - Tajikistan border
Origin; confluence of Pamir and Wakhan Rivers
Mouth: Amu Darya
Basin countries: Afghanistan, Tajikistan
Length 921 km (572 mi)
After passing the city of Khorog, capital of the Gorno-Badakhshan Autonomous Region of Tajikistan it receives water from one of its main tributaries, the Bartang River. It then turns towards the southwest, before joining the river Vakhsh and forming the greatest river of Central Asia, the Amudarya.
A water treaty between the Soviet Union and Afghanistan, signed in 1946, allows Afghanistan to draw 9 million cubic metres of water a year.
Paraguay River
Rio Paraguai in Portuguese
Río Paraguay in Spanish
Ysyry Paraguái in Guarani
From the city of Puerto Bahia Negra, Paraguay, the river forms the border between Paraguay and Brazil, flowing almost due south before the confluence with the Apa River.
flowing through the middle of Paraguay, at the confluence with the Pilcomayo River and passing the Paraguayan capital city, Asunción, the river forms the border with Argentina.
Countries: Paraguay, Brazil, Argentina, Bolivia
- left: Rio Negro, Miranda River, Cuiabá River, Apa River, Tebicuary River
- right: Jauru River, Pilcomayo River, Bermejo River
Source: - location: Parecis plateau, Mato Grosso, Brazil
Mouth: confluence with the Paraná River north of Corrientes
Length 2,621 km (1,629 mi)
flowing through the Pantanal wetlands, the city of Corumbá, and then running close to the Brazil-Bolivia border for a short distance in the Brazilian states of Mato Grosso and Mato Grosso do Sul
Paraná River
Rio Paraná,
Río Paraná
For approximately the next 200 km (120 mi) the Paraná flows southward and forms a natural boundary between Paraguay and Brazil until the confluence with the Iguazu River.
Countries: Argentina, Brazil, Paraguay
Region: Mesopotamia, Argentina
Primary source: Paranaíba River:-location:Rio Paranaíba, Minas Gerais, Brazil
Secondary source:Rio Grande: - location: Bocaina de Minas, Minas Gerais, Brazil
Source confluence: Paranaíba and Grande
Mouth: Rio de la Plata: - location:Atlantic Ocean, Argentina
Length 4,880 km (3,032 mi)
It is second in length only to the Amazon River among South American rivers . The name Paraná is an abbreviation of the phrase "para rehe onáva", which comes from the Tupi language and means "like the sea" (that is, "as big as the sea")
the river is dammed by the Itaipu Dam, the second largest hydroelectric power station in the world (after the Three Gorges Dam in the People's Republic of China)
Pigeon Bay
Location: Between Minnesota, United States, and Ontario, Canada
Type:Bay: Part of Lake Superior
River sources: Pigeon River, Little Pigeon Bay, Pine Bay and tributaries.
Primary outflows: Lake Superior
Basin countries: United States, Canada
Max. length 1 mile / 1.6 km
Max. width 3-4 miles / 4-6 km
Islands:Boundary Island (Canada), Marin Island, Owen Island
Pigeon River
Origin: Mountain Lake. The Pigeon River originates from a chain of lakes along the US-Canada border, the highest of which, and furthest west, is Mountain Lake
Mouth:Lake Superior
Basin countries:Canada, United States
Location: Minnesota/Ontario
Length 31.2 miles (50.2 km)
Pilcomayo River
Ysyry Araguay
It passes through the Argentine province of Formosa and the Gran Chaco plains of Paraguay, forming the border between these two countries before it joins the Paraguay River near Asunción. It is the longest western tributary of the Paraguay River.
Country: Argentina, Bolivia, Paraguay
Source: Andes. rises in the foothills of the Andes mountain range in the Bolivian Oruro Department, east of Poopó Lake. The Jach'a Juqhu River is considered the origin of the Pilcomayo. From the confluence with the Chillawa (Chillahua), the river is called Pilcomayo.
Along its course, the Pilcomayo silts up and splits into two main branches, North and South. After some distance, these branches rejoin to form the Lower Pilcomayo
Río de la Plata
River Plate,
La Plata River
is the estuary formed by the confluence of the Uruguay River and the Paraná River on the border between Argentina and Uruguay, , with the major ports and capital cities of Buenos Aires and Montevideo on its western and northern shores, respectively. The coasts of the Río de la Plata are the most densely populated areas of Argentina and Uruguay. It is a funnel-shaped indentation on the southeastern coastline of South America, about 290 kilometres (180 mi) long.
Name origin: Spanish, "river of silver"
Countries: Argentina, Uruguay
- left: Uruguay River, San Juan River, Santa Lucía River
- right; Paraná River, Luján River, Salado River
Cities: La Plata, Buenos Aires, Montevideo, San Fernando, San Isidro, Vicente López, Avellaneda, Quilmes, Berazategui, Hudson, Punta Lara, Atalaya, San Clemente del Tuyú, Ciudad del Plata, Ciudad de la Costa, Colonia del Sacramento
Source: confluence of Paraná and Uruguay Rivers
Mouth: Atlantic Ocean : - location: Argentine Sea, Argentina & Uruguay
Length 290 km (180 mi) 4,876 km including the Paraná
Putumayo River
Río Içá
It forms part of Colombia's border with Ecuador, as well as most of the frontier with Peru.
Countries:Brazil, Colombia, Ecuador, Peru
- left: Guamués River, San Miguel
- right: Cara Paraná
Source; Andes Mountains ; - location: East of Pasto, Colombia
Mouth: Amazon River:-location: Santo Antônio do Içá, Brazil
Length 1,610 km (1,000 mi)
Rainy River
The Rainy River (French: Rivière à la Pluie; Ojibwe: Gojiji-ziibi) is a river, approximately 137 kilometres (85 mi) long, which forms part of the U.S.-Canada border separating northern Minnesota and Northwestern Ontario.
It issues from the west side of Rainy Lake (French: lac à la Pluie; Ojibwe: Gojiji-zaaga'igan) and flows generally west-northwest, between International Falls, Minnesota, and Fort Frances, Ontario, and between Baudette, Minnesota, and Rainy River, Ontario. It enters the southern end of Lake of the Woods approximately 19 kilometres (12 mi) northwest of Baudette/Rainy River.
Rhine River
(Rhenus, Rhein, Rhin, Rijn)
forms part of the Swiss-Austrian, Swiss- Liechtenstein border, Swiss-German and then the Franco-German border
Name origin: Celtic Rēnos
Countries: Germany, Austria, Switzerland, France, Netherlands, Liechtenstein
Rhine Basin: Luxembourg, Belgium, Italy
Primary source: Vorderrhein:-location: Tomasee ("Lai da Tuma"), Surselva, Graubünden, in the southeastern Swiss Alps, Switzerland
Secondary source: Hinterrhein- location: Paradies Glacier, Graubünden, Switzerland
Source confluence: Reichenau- location: Tamins, Graubünden, Switzerland
Mouth: North Sea - location: Hoek van Holland, Rotterdam, Netherlands
Length 1,230 km (764 mi)
It is the second longest river in Central and Western Europe (after the Danube)
Rio Grande
Río Bravo del Norte, Tooh Baʼáadii (Navajo), Kótsoi (Jicarilla Apache)
The river serves as a natural border between the U.S. state of Texas and the Mexican states of Chihuahua, Coahuila, Nuevo León, and Tamaulipas. A very short stretch of the river serves as the boundary between the U.S. states of Texas and New Mexico.
Countries:United States, Mexico
States: Colorado, New Mexico, Texas, Chihuahua, Coahuila, Nuevo León, Tamaulipas
- left; Red River, Rio Hondo, Rio Pueblo de Taos, Embudo River, Santa Fe River, Galisteo Creek, Alamito Creek, Terlingua Creek, Pecos River, Devils River
- right; Conejos River, Rio Chama, Rio Conchos, Rio Salado, Rio Alamo, San Juan River
Source: Canby Mountain, Continental Divide- location: San Juan Mountains, Rio Grande National Forest, Colorado, United States
Mouth: Gulf of Mexico- location: Cameron County, Texas; Matamoros, Tamaulipas
Length 1,896 mi (3,051 km)
Ruvuma River
Ruvuma River, formerly also known as the Rovuma River, is a river in the African Great Lakes region. During the greater part of its course, it forms the border between Tanzania and Mozambique (in Mozambique known as Rio Rovuma).
The lower Ruvuma river is formed by the junction of two branches of nearly equal importance, the longer of which, the Lujenda, comes from the south-west, the other, which still bears the name Ruvuma, from the west. Its source lies on an undulating plateau, 1,000 m (3,300 ft) high, immediately to the east of Lake Nyasa.
Unity Bridge across the river between Mozambique and Tanzania
The mouth is near the boundary near the coast
Ruzizi River
Along its upstream reaches, the river forms part of the border between Rwanda on the east with the Democratic Republic of the Congo (DRC) on the west.
Further downstream, it forms part of the border between the DRC and Burundi, and its lowermost reach lies entirely within Burundi
Country: DR Congo (DRC), Rwanda, Burundi
Source: Lake Kivu- location: border between Bukavu and Cyangugu, South Kivu, DRC & Western Province, Rwanda
Mouth: Lake Tanganyika- location:west of Bujumbura, Burundi, Bujumbura Rural Province. The Ruzizi River, flowing south into Lake Tanganyika, is part of the upper watershed of the Congo River.
Length 117 km (73 mi)
Salween River
undammed Salween, one of the longest free-flowing rivers in the world
Countries: China, Burma, Thailand
State: Yunnan Region: Tibet
- left: Moei River
City : Mawlamyaing
Source Qinghai Mountains- location: Unknown glacier( Tibetan Plateau), Tibet, China
Mouth: Andaman Sea- location: Mawlamyaing, Burma
Length 2,815 km (1,749 mi)
Sava River
Its central part is a natural border of Bosnia-Herzegovina and Croatia. The Sava forms the northern border of the Balkan Peninsula, and southern edge of the Pannonian Plain.
Countries: Slovenia, Croatia, Bosnia-Herzegovina, Serbia
- left: Savinja, Sutla, Krapina, Lonja, Ilova-Trebež, Orljava, Bosut
- right: Ljubljanica, Krka, Kupa, Una, Vrbas, Ukrina, Bosna, Tinja, Drina, Kolubara
Cities: Kranj, Ljubljana, Zagreb, Sisak, Slavonski Brod, Brčko, Sremska Mitrovica, Šabac, Obrenovac, Belgrade
Source: Zelenci- location: Kranjska Gora, Slovenia
Mouth: Danube- location: Belgrade, Serbia
Length 990 km (615 mi)
Semliki River
it forms part of the international border between the DRC and the western Ugandan district of Bundibugyo, near the Semuliki National Park.
Country: DR Congo (DRC)
Source: Lake Edward- location: Ishango, DRC, North Kivu Province
Mouth: Lake Albert- location: southeast of Bunia, DRC, Orientale Province
Length 140 km (87 mi)
Sharda River (Hindi
Mahakali River (Nepali
Kali Gad (Hindi
Kali Ganga in Uttarakhand
India's border with China's Tibet Autonomous Region follows this watershed. Below Kalapani the river has been Nepal's western border with India since the Sugauli Treaty concluding the Anglo-Nepalese War of 1814-16.
Origin: The traditional source of the (Maha)Kali is the pond of the Kali temple at Kalapani in Pithoragarh District Uttarakhand, India. The geographic sources, however, are some five kilometers further north and some thousand metres higher: streams emerging from glaciers along the watershed with the uppermost Humla Karnali.
Mouth: Ghaghara River, Uttar Pradesh
Progression: Rises along Ganges-Yarlung Tsangpo watershed and flows south through Himalaya, Lesser Himalaya, Jogbudha Valley, Siwaliks and Terai, then SE across plains to join Ghaghara River, a tributary of the Ganges.
Basin countries: Nepal (Mahakali Zone); India states Uttarakhand and Uttar Pradesh
Length 350 kilometres (220 mi)
River system : Ganges
Left tributaries: (Nepal) Chameliya, Ramgun
Right tributaries: (Uttarakhand) Kuti, Dhauli, Gori, Sarju, Ladhiya
Notable national parks are the Shuklaphanta Wildlife Reserve in Nepal and Dudhwa National Park in India.Another reserve area "Kishunpur Pashu Vihar" sanctuary located about 30 km from Dudhwa. In 1987 Dudhwa National Park and Kishunpur Pashu Vihar were merged to form the Dudhwa Tiger Reserve (DTR).
Saint Clair River
Rivière Sainte Claire
forming part of the international boundary between the Canadian province of Ontario and the U.S. state of Michigan. The river is a significant component in the Great Lakes Waterway
Origin: Lake Huron
Mouth: Lake St. Clair: It branches into several channels near its mouth at Lake St. Clair, creating a broad delta region known as the St. Clair Flats.
Length 40.5 mi (65.2 km)
St. Marys River
Rivière Sainte-Marie
The twin cities of Sault Ste. Marie, Ontario, and Sault Ste. Marie, Michigan are connected across the St. Marys River by the Sault Ste. Marie International Bridge. The St. Marys Rapids are just below the river's exit from Lake Superior and can be bypassed through the Soo Locks and the Sault Ste. Marie Canal.
Countries: Canada, United States
Province/State: Ontario, Michigan
Cities: United States: Bay Mills, De Tour, Sault Ste. Marie, Soo, Sugar Island, Canada: Bruce Mines, Echo Bay, Hilton Beach, Jocelyn, MacLennan, St. Joseph, Sault Ste. Marie
Source: Whitefish Bay (Lake Superior)
Mouth: North Channel (Lake Huron)
Length 74.5 mi (120 km)
Drummond Island (Michigan)
Neebish Island (Michigan)
St. Joseph Island (Ontario)
Squirrel Island (Ontario / Garden River First Nation)
Sugar Island (Michigan)
Whitefish Island (Ontario / Batchewana First Nation)
Sutla (Croatian)
Sotla (Slovene)
a river flowing through Slovenia and Croatia, mostly forming their border
Mouth Sava
Basin countries Slovenia, Croatia
Length 89 km (55 mi)
Sutlej River
is the longest of the five rivers that flow through the historic crossroads region of Punjab in northern India and Pakistan. It is located north of the Vindhya Range, south of the Hindu Kush segment of the Himalayas, and east of the Central Sulaiman Range in Pakistan. The Sutlej River is also known as Satadree.
Country India, Pakistan
Source Lake Rakshastal (The Sutlej is sometimes known as the Red River. It is the easternmost tributary of the Indus River. Its source is Lake Rakshastal in Tibet.)
Mouth: About 17 kilometres (11 mi) north of Uch Sharif, the Sutlej unites with the Chenab River, forming the Panjnad River, which finally flows into the Indus river about 100 kilometres (62 mi) west of the city of Bahawalpur.
Length 1,500 km (932 mi) approx.
The waters of the Sutlej are allocated to India under the Indus Waters Treaty between India and Pakistan, and are mostly diverted to irrigation canals in India
Tana River
Finnish: Teno or Tenojoki;
Northern Sami: Deatnu;
Norwegian: Tanaelva;
Swedish: Tana älv
In its upper course it runs for 256 km (159 mi) along the Finnish-Norwegian border, between the municipalities of Utsjoki, Finland and Karasjok and Tana, Norway.
Countries: Norway, Finland
Regions Finnmark County in Norway, Lapland Region of Finland
in the Sápmi area of northern Scandinavia.
The Sámi name means "Great River". The main tributaries of Tana are Anarjohka and Karasjohka.
Source: Anarjohka-Karasjohka - location: North of Karigasniemi, Norway-Finland border
Mouth: Tanafjorden- location: Tana Municipality, Finnmark, Norway. The river mouth is one of the largest and most natural/virgin river deltas in Europe.
Length 361 km (224 mi)
Tijuana River
The Tijuana River drains an arid area along the U.S.—Mexico border, flowing through Mexico for most its course then crossing the border into Southern California for its lower 5 mi (8 km) to empty into the ocean in an estuary on the southern edge of San Diego.
Countries: Mexico, United States
States: Baja California, California
District: San Diego County (California)
Municipalities: Ensenada, Tijuana, Tecate, San Ysidro (Baja California)
- left: Arroyo de las Palmas
Source: Sierra de Juárez - location: Municipality of Ensenada
Mouth: Pacific Ocean - location: Imperial Beach
Length 120 mi (193 km)
Finnish: Tornionjoki,
Swedish: Torne älv, Torneälven,
Northern Sami: Duortneseatnu,
Meänkieli: Tornionväylä
It is a river in northern Sweden and Finland. For approximately half of its length it forms the border between these two countries.
Countries: Sweden
I country 1 = Norway (hydrological source), Finland
Source: Torne träsk and its main affluent - location; Kiruna Municipality, Norrbotten, Sweden.
It rises at Lake Torne (Swedish: Torneträsk) near the border with Norway
Mouth: Gulf of Bothnia- location: Tornio/Haparanda, Finland/Sweden
Length 510 km (317 mi) [1] plus 110 km above the outlet of Torneträsk
Tumen River
Tuman River in Korean
Duman in South Korea
The river flows in northeast Asia, on the border between China and North Korea in its upper reaches, and between North Korea and Russia in its last 17 kilometers (11 mi) before entering the Sea of Japan.
Name origin: Mongolian, "ten thousand" or a myriad
Countries; North Korea, China, Russia
Source: Paektu Mountain(Baekdu Mountain on the Chinese-North Korean border, as well as of the Yalu River (which forms the western portion of the border of North Korea and China)
Mouth: Sea of Japan- location; Sea of Japan (East Sea), Russia, North Korea (A former island at the mouth of the Tumen, known as Noktundo, has been a boundary contention between Russia and North Korea. The Qing Dynasty ceded the island to Russia as part of the Primorsky Maritimes (East Tartary) in the 1860 Treaty of Peking)
Length 521 km (324 mi)
Ubangi River
From its source to 100 kilometres (62 mi) below Bangui, the Ubangi defines the boundary between the Central African Republic and the Democratic Republic of the Congo (DRC). Thereafter, it forms the boundary between the DRC and the Republic of Congo until it empties into the Congo River.
It is the largest right-bank tributary of the Congo River of Central Africa.
It begins at the confluence of the Mbomou and Uele Rivers and flows west, then bends to the southwest and passes through Bangui, after which it flows south to the Congo at Liranga.
Together with the Congo River, it provides an important transport artery for river boats between Bangui and Brazzaville.
Una (Sava)
Origin:The source of the Una is the Una spring, also known as Vrelo Une, and is located on the north-eastern slopes of the Stražbenica mountain in Lika region, Croatia.
Mouth: It spills into the Sava River near small town of Jasenovac, Croatia
Basin countries:Croatia, Bosnia and Herzegovina
Length 207 km
1. After 4 km the river reaches Bosnia and Herzegovina at the confluence with the Krka River. From here the Una river forms a natural border between Croatia and Bosnia for the next 8.5 km until it reaches the rail bridge 1.5 km before the Bosnian town of Martin Brod.
2. border between the two countries for the second time, 9 km downstream town of Kulen Vakuf. From here it forms the border for the next 20 km.
3. After 85 km of flowing through Bosnia, the Una again marks the border between Bosnia and Herzegovina and Croatia for the third and final time, near the villages of Dobretin and Javornik (Croatia).
Ural River
The entire length of the Ural River is considered the Europe-Asia boundary by most authoritative sources.
Origin: near Mount Kruglaya of the Uraltau mountain ridge in southern Ural Mountains, Russia
flows south parallel and west of the north-flowing Tobol River, through Magnitogorsk, and around the southern end of the Urals, through Orsk where it turns west for about 300 kilometres (190 mi), to Orenburg, when the Sakmara River joins. From Orenburg it continues west, passing into Kazakhstan, then turning south again at Oral, and meandering through a broad flat plain until it reaches the Caspian a few miles below Atyrau, where it forms a fine digitate delta.
Mouth: Caspian Sea
Basin countries: Russia, Kazakhstan
Length 2,428 km (1,509 mi)
It is the third longest river in Europe after the Volga and the Danube
Uruguay River
Río Uruguay,
Rio Uruguai
It passes between the states of Santa Catarina and Rio Grande do Sul in Brazil; forms the eastern border of the provinces of Misiones, Corrientes, and Entre Ríos in Argentina; and makes up the western borders of the departments of Artigas, Salto, Paysandú, Río Negro, Soriano, and Colonia in Uruguay.
Countries: Argentina, Brazil, Uruguay
Source: starts in the Serra do Mar in Brazil, where the Canoas River and the Pelotas River are joined
Mouth: Río de la Plata (Together with the Paraná River, the Uruguay forms the Río de la Plata estuary.)
Length 1,838 km (1,140 mi)
An unusual feature of the Uruguay River is a submerged canyon. This canyon formed during the Ice Age. The canyon is only visible in two places, one of which is the Moconá Falls (also called the Yucumã Falls). However, the falls are not visible for 150 days per year and become more like rapids when they are not visible. Unlike most waterfalls, the Moconá Falls are parallel to the river, not perpendicular.
Ussuri River
It rises in the Sikhote-Alin mountain range, flowing north and forming part of the Sino-Russian border (which is based on the Sino-Russian Convention of Peking of 1860) until it joins the Amur River as a tributary to it at Khabarovsk .
During World War II, the river marked one of the boundaries which Soviet forces crossed into Manchuria in Operation August Storm in 1945.
The Sino-Soviet border conflict of 1969 took place at the Soviet Damansky Island on the Ussuri River.
Major tributaries of the Ussuri River are:
Muling River (left)
Naoli River (left)
Songacha River (left)
Arsenyevka River (left)
Bikin River (right)
Khor River (right)
Bolshaya Ussurka River (right)
Vaupés River
Uaupés River
It forms part of the international border between Colombia and the Amazonas state of Brazil.
Countries: Brazil, Colombia
Source: - location: Guaviare Department, Colombia
flowing east through Guaviare and Vaupés Departments
On the border it merges with the Papurí River and becomes known as the Uaupés.
Mouth: The river continues on east until it flows into the Rio Negro at São Joaquim, Amazonas.
Length 1,050 km (652 mi)
Vaupés is a blackwater river. A blackwater river is a river with a deep, slow-moving channel flowing through forested swamps or wetlands. As vegetation decays, tannins leach into the water, making a transparent, acidic water that is darkly stained, resembling tea or coffee.
Yalu River
Amnok River -Korean
Yalu river on the border between North Korea and China. Together with the Tumen River to its east, and a small portion of Paektu Mountain, the Yalu forms the border between North Korea and China and is notable as a site involved in military conflicts in the First Sino-Japanese War, the Russo-Japanese War and the Korean War
Name origin: Manchu, "the boundary between two countries"
Countries: China (CHN), North Korea (PRK)
Provinces: Jilin (CHN), Liaoning (CHN), Ryanggang (PRK), Chagang (PRK), North Pyongan (PRK), Sinuiju SAR (PRK)
Source: South of Heaven Lake, CHN-PRK border, Paektu Mountain (Changbai Mountain), on the North Korea-China border
Mouth: Korea Bay, between Dandong (China) and Sinuiju (North Korea)
Length 790 km (491 mi)
There are 205 islands on the Yalu. A 1962 border treaty between North Korea and China split the islands according to which ethnic group were living on each island. North Korea possesses 127 and China 78.
Zambezi River
The river rises in Zambia and flows through eastern Angola, along the eastern border of Namibia and the northern border of Botswana, then along the border between Zambia and Zimbabwe to Mozambique, where it crosses that country to empty into the Indian Ocean.
Nickname: besi
Countries Zambia, DR Congo, Angola, Namibia, Botswana, Zimbabwe, Mozambique, Malawi, Tanzania
Source: The river rises in a black marshy dambo in north-west Zambia, in dense undulating miombo woodland - location: Mwinilunga, Zambia
Mouth Indian Ocean
- location Mozambique
- coordinates 18°34′14″S 36°28′13″ECoordinates: 18°34′14″S 36°28′13″E
Length 2,574 km (1,599 mi)
Upper Zambezi: flows to the south-west into Angola- dense evergreen Cryptosepalum dry forest,- re-enters Zambia- Chavuma Falls- to the Victoria Falls
Middle Zambezi: Victoria Falls -through the Batoka Gorge- enters Lake Kariba, created in 1959 following the completion of the Kariba Dam-At the confluence of the Luangwa it enters Mozambique.-ends where the river enters Lake Cahora Bassa (also spelled Cabora Bassa)
Lower Zambezi: from Cahora Bassa- the Lupata Gorge-On approaching the Indian Ocean, the river splits up into a delta
Zarumilla River
The Zarumilla River is a river in South America that marks the border between Peru and Ecuador. It is named after the Peruvian town of Zarumilla.
It is part of the Gulf of Guayaquil-Tumbes mangroves Sanctuary
It empties into the Gulf of Guayaquil.
The largest towns on its banks are Huaquillas, in the Ecuadorian province of El Oro, and Aguas Verdes in the Tumbes Region of Peru
In 1998, during El Niño, the river changed its course, moving 1 square kilometre of land into its eastern margin. Ecuadorians took advantage of this situation, saying that the river is the natural border marker and therefore gives them rights in the affected area. The Peruvians argued that the area is sovereign Peruvian soil.