The Amazon River in South America is the largest river by discharge volume of water in the world, and the disputed longest river in the world.
The Ohio River is a 981-mile (1,579 km) long river in the United States. It is located at the boundary of the Midwestern and Southern United States, flowing southwesterly from far-western Pennsylvania south of Lake Erie to its mouth on the Mississippi River at the southern tip of Illinois. It is the third largest river by discharge volume in the United States and the largest tributary by volume of the north-south flowing Mississippi River that divides the eastern from western United States. The river flows through or along the border of six states, and its drainage basin includes parts of 14 states. Through its largest tributary, the Tennessee River, the basin includes several states of the southeastern U.S. It is the source of drinking water for three million people.
The Godavari is India's second longest river after the Ganga and third largest in India, drains about 10% of India's total geographical area. Its source is in Triambakeshwar, Maharashtra. It flows east for 1,465 kilometres (910 mi), draining the states of Maharashtra (48.6%), Telangana (18.8%), Andhra Pradesh (4.5%), Chhattisgarh (10.9%) and Odisha (5.7%). The river ultimately empties into the Bay of Bengal through an extensive network of tributaries. Measuring up to 312,812 km2 (120,777 sq mi), it forms one of the largest river basins in the Indian subcontinent, with only the Ganga and Indus rivers having a larger drainage basin. In terms of length, catchment area and discharge, the Godavari is the largest in peninsular India, and had been dubbed as the Dakshina Ganga.
A tributary or affluent is a stream or river that flows into a larger stream or main stem river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage basin of its surface water and groundwater, leading the water out into an ocean. The Irtysh is a chief tributary of the Ob river and is also the longest tributary river in the world with a length of 4,248 km (2,640 mi). The Madeira river is the largest tributary river by volume in the world with an average discharge of 31,200 m3/s (1,100,000 cu ft/s).
The Drava or Drave is a river in southern Central Europe. With a length of 710 kilometres (440 mi), 724 kilometres (450 mi) including the Sextner Bach source, it is the fifth or sixth longest tributary of the Danube, after the Tisza, Sava, Prut, Mureș and perhaps Siret. Its source is near the market town of Innichen, in the Puster Valley of South Tyrol, Italy. The river flows eastwards through East Tirol and Carinthia in Austria into the Styria region of Slovenia. It then turns southeast, passing through Croatia and, after merging with its main tributary Mur, forms most of the border between Croatia and Hungary, before it joins the Danube near Osijek.
The Kaveri is an Indian river flowing through the states of Karnataka and Tamil Nadu. The Kaveri river rises at Talakaveri in the Brahmagiri range in the Western Ghats, Kodagu district of the state of Karnataka, at an elevation of 1,341 m above mean sea level and flows for about 800 km before its outfall into the Bay of Bengal. It reaches the sea in Poompuhar in Mayiladuthurai district. It is the third largest river – after Godavari and Krishna – in southern India and the largest in the State of Tamil Nadu, which, on its course, bisects the state into North and South.
The Brahmaputra, also known as the Yarlung Tsangpo in Tibet, the Siang/Dihang River in Arunachal Pradesh, and Luit, Dilao in Assam, is a trans-boundary river which flows through Tibet, India, and Bangladesh. It is the 9th largest river in the world by discharge, and the 15th longest.
Wkra is a river in north-eastern Poland, a tributary of the Narew river, with a length of 255 kilometres and a basin area of 5,348 km² - all within Poland. Among its tributaries are the Łydynia and the Płonka.
The headwaters of a river or stream is the farthest place in that river or stream from its estuary or downstream confluence with another river, as measured along the course of the river. It is also known as a river's source.
The Wabash River is a 503-mile-long (810 km) river that drains most of the state of Indiana in the United States. It flows from the headwaters in Ohio, near the Indiana border, then southwest across northern Indiana turning south near the Illinois border where the southern portion forms the Indiana-Illinois border before flowing into the Ohio River. It is the largest northern tributary of the Ohio River and third largest overall, right behind the Cumberland and Tennessee Rivers. From the dam near Huntington, Indiana, to its terminus at the Ohio River, the Wabash flows freely for 411 miles (661 km). Its watershed drains most of Indiana. The Tippecanoe River, White River, Embarras River and Little Wabash River are major tributaries. The river's name comes from a Miami Indian word meaning "water over white stones".
The River Lynher flows through east Cornwall, England, and enters the River Tamar at the Hamoaze, which in turn flows into Plymouth Sound.
The Huai River, formerly romanized as the Hwai, is a major river in China. It is located about midway between the Yellow River and Yangtze, the two longest rivers and largest drainage basins in China, and like them runs from west to east. Historically draining directly into the Yellow Sea, floods have changed the course of the river such that it now primarily dischages into the Yangtze. The Huai is notoriously vulnerable to flooding.
The Liao River is the principal river in southern Northeast China, and one of the seven main river systems in mainland China. Its name derived from the Liao region, a historical name for southern Manchuria, from which the Liaoning province, Liaodong Peninsula and Liao dynasty also all have derived their names. The river is also popularly known as the "mother river" in Northeast China. Coursing 1,345 kilometres (836 mi) long, the Liao River system drains a catchment basin of over 232,000 square kilometres (90,000 sq mi), but its mean discharge is quite small at only about 500 cubic metres per second (18,000 cu ft/s), about one-twentieth that of the Pearl River. The Liao River has an exceedingly high sediment load because many parts of it flow through powdery loess.
The Chautang, originating in Siwalik Hills, is a tributary of Sarsuti river which in turn is tributary of Ghaggar river in of Haryana state of India.
The Methow River is a tributary of the Columbia River in northern Washington in the United States. The river's 1,890-square-mile (4,900 km2) watershed drains the eastern North Cascades, with a population of about 5,000 people. The Methow's watershed is characterized by relatively pristine habitats, as much of the river basin is located in national forests and wildernesses. Many tributaries drain the large Pasayten Wilderness. An earlier economy based on agriculture is giving way to one based on recreation and tourism.
Chittar River and its five tributaries and numerous other contributing streams originate in the Courtallam hills of Tenkasi District in the state of Tamil Nadu in southern India. Together with its tributaries and streams, the Chittar River serves as an important source of irrigation for the region and is a major tributary of the Tambaraparani River along with the Manimuthar River.
In hydrology, a mainstem is "the primary downstream segment of a river, as contrasted to its tributaries". Water enters the mainstem from the river's drainage basin, the land area through which the mainstem and its tributaries flow. A drainage basin may also be referred to as a watershed or catchment.
The Sahibi river, also called the Sabi River, is an ephemeral, rain-fed river flowing through Rajasthan, Haryana and Delhi states in India. It drains into Yamuna in Delhi, where its channeled course is also called the Najafgarh drain, which also serves as Najafgarh drain bird sanctuary. Sahibi is a seasonal river which is 300 km long and flows from Aravalli hills in Rajasthan to Haryana, of which 100 km is in Haryana.
