Border rivers

The Danube ( ; see also other names) is a river in Europe, the second-longest after the Volga in Russia. It flows through Central and Southeastern Europe, from the Black Forest of Germany south through the Danube Delta in Romania into the Black Sea. A large and historically important river, it was once a frontier of the Roman Empire. In the 21st century, it connects ten European countries, running through their territories or marking a border. Originating in Germany, the Danube flows southeast for , passing through or bordering Austria, Slovakia, Hungary, Croatia, Serbia, Romania, Bulgaria, Mo

The Rhine ( ) is one of the major rivers of Europe. The river begins in the Swiss canton of Graubünden in the southeastern Swiss Alps. It forms part of the Swiss-Liechtenstein border, then part of the Swiss-Austrian border. From Lake Constance downstream, it forms part of the Swiss-German border. After that the Rhine defines much of the Franco-German border. It then flows in a mostly northerly direction through the German Rhineland. Finally, the Rhine turns to flow predominantly west to enter the Netherlands, eventually emptying into the North Sea. It drains an area of 185,000 km2.

The Ganges ( ; in India: Ganga, ; in Bangladesh: Padma, ) is a trans-boundary river of Asia which flows through India and Bangladesh.The Ganga is the National River of India.The river rises in the western Himalayas in the Indian state of Uttarakhand. It flows south and east through the Gangetic plain of North India, receiving the right-bank tributary, the Yamuna, which also rises in the western Indian Himalayas, and several left-bank tributaries from Nepal that account for the bulk of its flow. In West Bengal, India, a feeder canal taking off from its right bank diverts 50% of its flow southwa

river in central Africa

river in West Africa

thumb|Mosul, on the bank of the Tigris, 1861

The Dnieper or Dnepr ( ), also called the Dnipro, is one of the major transboundary rivers of Europe, rising in the Valdai Hills near Smolensk, Russia, before flowing through Belarus and Ukraine to the Black Sea. Approximately long, with a drainage basin of , it is the longest river of Ukraine and Belarus and the fourth-longest river in Europe, after the Volga, Danube, and Ural rivers.

river in West Asia which flows to the Dead Sea

The Mekong or Mekong River ( , ) is a transboundary river in East Asia and Southeast Asia. It is the world's twelfth-longest river and the third-longest in Asia with an estimated length of and a drainage area of , discharging of water annually. From its headwaters in the Tibetan Plateau, the river runs through Southwest China (where it is officially called the Lancang River), Myanmar, Laos, Thailand, Cambodia, and southern Vietnam. The extreme seasonal variations in flow and the presence of rapids and waterfalls in the Mekong make navigation difficult, though the river remains a major trade ro

The Amur River () or Heilong River () is a perennial river in Northeast Asia, forming the natural border between the Russian Far East and Northeast China (historically the Outer and Inner Manchuria). The Amur proper is long, and has a drainage basin of . If including its main stem tributary, the Argun, the Amur is long, making it the world's tenth longest river.

river in Russia and Kazakhstan

The Oder ( ; Czech and ) is a river in Central Europe. It is Poland's second-longest river and third-longest within its borders after the Vistula and its largest tributary the Warta. The Oder rises in the Czech Republic and flows through western Poland, later forming of the border between Poland and Germany as 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 Bay of Pomerania of the Baltic Sea.

The Zambezi (also spelled Zambeze and Zambesi) is the fourth-longest river in Africa, the longest east-flowing river in Africa and the largest flowing into the Indian Ocean from Africa. Its drainage basin covers , slightly less than half of the Nile's. The river rises in Zambia and flows through eastern Angola, along the north-eastern border of Namibia and the northern border of Botswana, then along the border between Zambia and Zimbabwe to Mozambique, where it crosses the country to empty into the Indian Ocean.

major river in Central Asia

The Orinoco () is one of the longest rivers in South America at . Its drainage basin, sometimes known as the Orinoquia, covers approximately , with 65% of it in Venezuela and 35% in Colombia. It is the fourth largest river in the world by discharge volume of water ( at delta) due to the high precipitation throughout its catchment area (). The Orinoco River and its tributaries are the major transportation system for eastern and interior Venezuela and the Llanos of Colombia. The Guaviare River, with a flow of 8,200 cubic meters, is the main tributary. The environment and wildlife in the Orinoco'

major river in the western United States and Mexico

The Meuse or Maas is a major European river, rising in France and flowing through Belgium and the Netherlands before draining into the North Sea from the Rhine–Meuse–Scheldt delta. It has a total length of .

river originating in Colorado, flowing south through New Mexico, and forming part of the US-Mexico border along Texas until emptying into the Gulf of Mexico

river in South America

The Moselle ( , ; ; ) is a river that rises in the Vosges mountains and flows through north-eastern France and Luxembourg to western Germany. It is a left bank tributary of the Rhine, which it joins at Koblenz. A small part of Belgium is in its basin as it includes the Sauer and the Our.

The Tisza, Tysa or Tisa (see below) is one of the major rivers of Central and Eastern Europe. It was once called "the most Hungarian river" because it flowed entirely within the territory of the Kingdom of Hungary. Today, it crosses several national borders.

estuary formed by the confluence of the Uruguay River and the Paraná River on the border between Argentina and Uruguay

river in southern Africa

river in South America

The Sava is a river in Central and Southeast Europe, a right-bank and the longest tributary of the Danube. From its source in Slovenia, it flows through Croatia and along its border with Bosnia and Herzegovina, and finally reaches Serbia, feeding into the Danube in its capital, Belgrade.

river of Argentina, Brazil and Paraguay

tributary of the Amazon river

river located in and along the countries of Turkey, Armenia, Azerbaijan, and Iran

river in southwestern Africa

river in Germany

The Drava or Drave (, ; ; ; ; ), historically known as the Dravis or Dravus, is a river in southern Central Europe. With a length of (441 miles), or (450 miles), if the length of its Sextner Bach source is added, it is the fifth or sixth longest tributary of the Danube, after the Tisza, Sava, Prut, Mureș and likely Siret. The Drava drains an area of about 40,154 square kilometers (15,504 sq. mi.). Its mean annual discharge is seasonally (650 cu. yd.) per second) to (880 cu. yd.) per second. Its source is near the market town of Innichen, in the Puster Valley of South Tyrol, Italy. The river fl

largest tributary of the Congo River in the region of Central Africa

river in Asia

The Prut (also spelled in English as Pruth; , ) is a river in Eastern Europe. It is a left tributary of the Danube, and is long. Part of its course forms Romania's border with Moldova and Ukraine.

The Sutlej River or the Satluj River is a major river in Asia, flowing through China, India and Pakistan, and is the longest of the five major rivers of the Punjab region. It is also known as Satadru; and is the easternmost tributary of the Indus River. The combination of the Sutlej and Chenab rivers in the plains of Punjab forms the Panjnad, which finally flows into the Indus River at Mithankot.

river on the border between North Korea and China

major European river

watercourse on the boundary of Canada and the United States

river in Asia

tributary of the Congo River

river in Central Europe

thumb|290px|right|Map of the river

river between Estonia and Russia

river in Rwanda

river in Central Europe

river in Afghanistan, Iran and Turkmenistan

The Ussuri ( ; ) or Wusuli ( ) is a river that runs through Khabarovsk and Primorsky Krais, Russia and the southeast region of Northeast China in the province of Heilongjiang. 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 as a tributary near Khabarovsk. It is approximately long. The Ussuri drains the Ussuri basin, which covers . Its waters come from rain (60%), snow (30–35%), and subterranean springs. The average discharge is , and the average elev

river in Central Europe

tributary of the Amu Darya

river in Brazil

thumb|260px|Alazani Valley The Alazani ( ) is a river that flows through the Caucasus. It is the main tributary of the Kura in eastern Georgia, and flows for . Part of its path forms the border between Georgia and Azerbaijan, before it meets the Kura at the Mingəçevir Reservoir in Azerbaijan. The river is likely the same as that referred to by classical authors Strabo and Pliny as "Alazonius" or "Alazon", and may also be the Abas River mentioned by Plutarch (Plut. Pomp. 35) and Dio Cassius (37.3) as the location of the Battle of the Abas (65 BCE).

river along the border between Michigan and Ontario

river in Southern Africa

river in Paraná, Brazil

river in China, Russia and North Korea

river in France and Germany

river of South America

The Salzach () is a river in Austria and Germany. It is in length and is a right tributary of the Inn, which eventually joins the Danube. Its drainage basin of comprises large parts of the Northern Limestone and Central Eastern Alps. 83% of its drainage basin () lies in Austria, the remainder in Germany (Bavaria). Its largest tributaries are Lammer, Berchtesgadener Ache, Saalach, Sur and Götzinger Achen.

river in Switzerland and France

major river in Bangladesh