710 articles
Tigris (دجلة)
Tigris (دجلة, Dejla; Sumerian Idigna): major Middle Eastern river, about 2,032 km, rising in Turkey's Taurus mountains and flowing through Iraq to the Persian Gulf; snowmelt-fed, core of Mesopotamia, now severely reduced by upstream dams and drought.
Tigris–Euphrates river system
The Tigris–Euphrates river system is the paired river system of Western Asia, where the Tigris and Euphrates rise in eastern Turkey and flow through Syria and Iraq to the Persian Gulf.
Tinkisso
The Tinkisso is a river in Guinea, West Africa, rising in the highlands near Dabola and Dinguiraye and joining the Niger River near Siguiri.
Tobol
Tobol (Тобыл, Tobyl), 1,591-km left tributary of the Irtysh rising in Kostanay Region, Kazakhstan, flowing through Kurgan to Tobolsk; snow-fed, reservoir-regulated, transboundary with Russia, supplying Kostanay's water.
Tocantins - Araguaia
Tocantins-Araguaia (bacia do Tocantins-Araguaia): major Brazilian river system of the Tocantins and Araguaia rivers, ~770,000-918,800 km², draining to the Amazon estuary via the Rio Pará, with Bananal Island, over 700 fish species, and Tucuruí Dam.
Tocantins (river, Brazil)
The Tocantins River (Rio Tocantins) rises in Goiás, Brazil, and flows about 1,500 miles north to the Atlantic near Belém. Its 760,000 km² basin with the Araguaia is Brazil's most dammed Amazon system, including 8,370 MW Tucuruí.
Toccoa/Ocoee River
Toccoa/Ocoee River: an Appalachian river rising in northeast Georgia (Toccoa) and flowing through southeast Tennessee (Ocoee), regulated by three TVA dams and known for dam-release whitewater rafting and the 1996 Olympic canoe slalom course.
Tom
Tom (Томь), a right-bank tributary of the Ob River in western Siberia, flowing past Novokuznetsk, Kemerovo, Yurga, and Tomsk; name from the Ket word 'Toom', meaning the river; heavily affected by industrial pollution and sediment dredging.
Tombigbee River
The Tombigbee River is a river rising in northeastern Mississippi and flowing south through Mississippi and Alabama to join the Alabama River and form the Mobile River.
Tributary
Tributary: a freshwater stream feeding a larger stream or river, joining it at a confluence. Ranked by Strahler stream order; small tributaries hold over 90% of US stream length.
Trinity River (California)
Trinity River (California): major Klamath River tributary in northwestern California, site of the 1848 Reading gold discovery, dammed by Trinity and Lewiston Dams (1962-63) for Central Valley Project diversions, and subject of the Trinity River Restoration Program for salmon and steelhead.
Trinity River (Texas)
Trinity River (Texas), longest river entirely within Texas: 423-mile main stem from Dallas to Trinity Bay, 17,969 sq mi basin, 1908 flood, steamboat era, PCB advisories, Galveston Bay inflow.
Triveni Sangam (त्रिवेणी संगम)
Triveni Sangam (त्रिवेणी संगम), also called the Sangam at Allahabad, is the confluence of the Ganga, Yamuna, and mythical Saraswati at Prayagraj, India, the Kumbh Mela's principal bathing site.
Trombetas
Trombetas (Rio Trombetas), a ~750 km clear-water Amazon tributary in Pará, Brazil, draining 150,000 km² from the Guiana Shield; home of the 1979 Trombetas Biological Reserve, quilombola communities, and MRN's Porto Trombetas bauxite mining district.
Tungabhadra River (ತುಂಗಭದ್ರಾ ನದಿ)
Tungabhadra River (ತುಂಗಭದ್ರಾ ನದಿ), also called the Tunga-Bhadra, is a 531 km Krishna tributary formed at Koodli, Karnataka, flowing past Hampi and impounded by the Tungabhadra Dam near Hospet.
Tuo
Tuo (沱) names several Chinese rivers: the Tuojiang, a ~638 km upper-Yangtze tributary in Sichuan; a 112 km Huaihe tributary in Anhui; and the Tuotuo River, a Yangtze source-region river on the Qinghai-Tibet Plateau.
Tura
Tura (Тура) names a 1,030 km Siberian tributary of the Tobol supplying Tyumen, the largest Garo Hills town in Meghalaya, India, a Paleogene geological formation, and a 101 km Ingoda tributary.
Turia (river)
Turia (Túria), river of eastern Spain rising in Valencia and Cuenca provinces and flowing to the Mediterranean at Valencia; diverted south of the city by the Plan Sur after the deadly 1957 flood, leaving the old bed as the Turia Gardens park.
Tyung
Tyung (Тюнг, Түҥ) is a 1,092 km left tributary of the Vilyuy River in Yakutia, Russia, draining 49,800 km² into the Lena basin, with 180 m³/s mean discharge and Cretaceous fossil outcrops.
Ucayali River
Ucayali River (Río Ucayali), Peruvian white-water Amazon tributary formed at Atalaya by the Apurímac and Urubamba; about 1,460 km long, joins the Marañón above Iquitos to form the Amazon, discharging 12,000 m³/s.
Uchur
Uchur (Учур), Evenki for "whirlwind", is an 812 km right tributary of the Aldan River in Khabarovsk Krai and Yakutia, Russia, draining 113,000 km² with a mean discharge of 1345 m³/s, navigable on its lower 159 km.
Uele (landform)
Uele (Uellé, Uélé), river in northeastern Democratic Republic of the Congo, rising near the Uganda border at about 1,620 m and flowing about 1,100–1,210 km west to join the Bomu at Yakoma and form the Ubangi River.
Upper Amu Darya
Upper Amu Darya: mountainous headwater reach of the Amu Darya (Oxus) in the Pamir and Hindu Kush, bordering Afghanistan and Tajikistan; generates over 90% of the river's flow, about 72.6 km³ annually.
Upper Brahmaputra
Upper Brahmaputra (Yarlung Zangbo, Tsang Po) is the Tibetan Plateau portion of the Brahmaputra basin, about 240,000 km2, defined by glacier- and snowmelt-driven hydrology, late-1990s water yield regime shifts, and FEOW ecoregion 711.
Upper Congo
Upper Congo, FEOW freshwater ecoregion 540, the Lualaba reach of the Congo River in the DRC from the Shaba Plateau to the Upper Congo Rapids, with endemic molluscs and a poorly surveyed endemic fish fauna.
Upper Congo Rapids
Upper Congo Rapids, freshwater ecoregion 539 (FEOW), a stretch of the Lualaba/Congo River between Ubundu and Kisangani, DR Congo, where the river drops 60 m over 100 km through rapids including Boyoma Falls, forming a fish dispersal barrier with a rapids-adapted fauna.
Upper Danube
Upper Danube: upper course of the Danube River from the Black Forest through Austria to the Drava confluence; also WWF freshwater ecoregion 417, 248,000 km², temperate upland rivers with endemic lake whitefish and heavily altered hydrology.
Upper Huang He
The Upper Huang He (upper Yellow River) is the headwater reach of China's Yellow River on the Tibetan Plateau, freshwater ecoregion 634 supplying over 35% of the basin's water.
Upper Huang He Corridor
Upper Huang He Corridor (FEOW ecoregion 634): a Palearctic montane-freshwater ecoregion in China covering the Yellow River from the Himalayan exit to about Guide, Qinghai, plus Gansu's endorheic basins, with 1 endemic fish species.
Upper Irtysh
Upper Irtysh (Black Irtysh, Ertix He): headwater reach of the Irtysh River from the Altai glaciers in Xinjiang through Lake Zaysan to Ust-Kamenogorsk; also FEOW freshwater ecoregion 603 with 43 fish species, two endemics, and a large Soviet dam cascade.