710 articles
Guzman - Samalayuca
Guzmán - Samalayuca (FEOW ecoregion 161) is a xeric, endorheic freshwater ecoregion in Chihuahua, Mexico, and the southwestern United States, formed after the mid-Pleistocene diversion of the upper Rio Grande and rich in endemic fishes such as Cyprinella bocagrande.
Ha! Ha! River (Saguenay River tributary)
Ha! Ha! River (Rivière Ha! Ha!), a 75-km Saguenay River tributary in Quebec with a 609 km² basin; named likely from French haha, and site of the 1996 dike-failure flood.
Hainan (protected area)
Hainan (海南) is freshwater ecoregion 759 of the FEOW framework, covering Hainan Island, China; an Indo-Malay tropical and subtropical coastal rivers unit with the Nandu, Changhua, and Wanquan rivers and no recorded endemic fish.
Han
Han: name of two East Asian rivers. The Chinese Hanjiang (汉江), 1,577 km, is the Yangtze's largest tributary and source of the South-to-North Water Diversion Middle Route; the Korean Han River flows through Seoul.
Han River (Korea)
Han River (한강), Korea's largest river by discharge, 514.8 km, formed by the South and North Han at Yangsuri, flowing through Seoul to the Yellow Sea; historic Joseon capital river, engineered 1967–1986, now restored with parks.
Hawkesbury River
Hawkesbury River (New South Wales): drowned river-valley estuary entering Broken Bay, named by Arthur Phillip in 1789 after Baron Hawkesbury; 21,624 km2 catchment, Sydney's water source, and NSW's highest flood-risk valley.
Hay (landform)
Hay, the Hay River (Kátł'odehé, "willow grass river"), is a 1,114 km river flowing through Alberta, British Columbia, and the Northwest Territories into Great Slave Lake.
Helmand
The Helmand, also known as Hirmand, is the longest river in Afghanistan, running about 800 miles from the Hindu Kush to the Hamun wetlands near Iran.
Holston River
The Holston River is a 274-mile tributary of the Tennessee River that rises in the Blue Ridge foothills and flows through southwestern Virginia into eastern Tennessee.
Honshu - Shikoku - Kyushu
Honshu - Shikoku - Kyushu, FEOW freshwater ecoregion 642 (temperate coastal rivers, Japan), spans the Ryukyu Islands north through Kyushu, Shikoku, and Honshu, with about twenty endemic fish species; Lake Biwa (643) and Hokkaido (641) are separate ecoregions.
Hooghly River (হুগলি নদী)
Hooghly River (হুগলি নদী), also spelled Hugli, a ~260 km Ganges distributary in West Bengal flowing past Kolkata to the Bay of Bengal at the Sundarbans; tidal estuary, home of Kolkata Port, affected by PAH, trace-element, and microplastic pollution.
Huallaga
Huallaga (Río Huallaga), Peruvian Andean-Amazonian river, 1,138 km, rising near Cerro de Pasco and joining the Marañón; 90,232 km² basin, Chaglla dam (456 MW), high flood risk, agriculture and water-quality pressures.
Huang
Huang (黄河, Huang He, Yellow River) is China's second longest river, 5,464 km, rising in Qinghai's Bayan Har Mountains and entering the Bohai Sea; famed for silt, course changes, and as the cradle of Chinese civilization.
Huang He Great Bend
Huang He Great Bend (Hetao region): the roughly 1,500 km rectangular loop of China's Yellow River around the Ordos block, spanning Gansu, Ningxia, Inner Mongolia, Shaanxi, and Shanxi; formed tectonically in late Miocene-early Pliocene time.
Hudson River
The Hudson River is a 315-mile New York river rising in the Adirondacks, tidal from New York Harbor to Troy, discovered by Henry Hudson in 1609, and the site of a major EPA PCB Superfund cleanup from GE plants at Fort Edward and Hudson Falls.
Humboldt River
Humboldt River: Nevada river rising at Humboldt Wells, flowing over 300 miles to the Humboldt Sink; Nevada's only major internal river basin, emigrant trail artery, and irrigated water source with Rye Patch Dam.
Huron River
Huron River, a river of southeastern Michigan rising near Pontiac and flowing about 80 miles to Lake Erie; drains roughly 1,000 square miles across seven counties and supplies Ann Arbor's drinking water.
Ice jam
An ice jam is an accumulation of broken river ice that lodges at an obstruction or constriction and blocks a stream's flow, impounding water that floods upstream.
Iceland - Jan Mayen
Iceland - Jan Mayen, FEOW freshwater ecoregion 401 (Polar freshwaters), pairs Iceland with the Norwegian volcanic island Jan Mayen; known for endemic Thingvallavatn charr, glacial rivers, and scarce Jan Mayen fresh water.
Iguassu
Iguassu (FEOW ecoregion 346) is the freshwater ecoregion of the Iguaçu River basin above Iguaçu Falls in Brazil and Argentina, isolated 22 million years, with about 39 endemic fish species, dam fragmentation, pollution, and a last free-flowing reach in Iguaçu National Park.
Ili
Ili (Ile; 伊犁河): transboundary Central Asian river rising in Xinjiang's Tianshan, flowing through Kazakhstan into Lake Balkhash, supplying 70-80% of its inflow; no China-Kazakhstan allocation agreement.
Indian Ocean Slope of Sumatra & Java
Indian Ocean Slope of Sumatra & Java, FEOW freshwater ecoregion 737, tropical and subtropical coastal rivers of southwestern Sumatra and Java plus offshore islands, with about 20 endemic fishes and Lake Maninjau.
Indus Delta
Indus Delta, river delta of the Indus in Sindh, Pakistan; fifth largest delta worldwide, Ramsar site 1284 (472,800 ha), arid-climate mangroves, severe seawater intrusion and land loss from upstream irrigation diversion.
Indus River
The Indus River is a major South Asian river rising in Tibet, known for hosting the Indus Valley civilization and sustaining the world's largest contiguous irrigation network.
Indus River Delta
The Indus River Delta is the mangrove-fringed, tide-dominated delta where the 2,900 km Indus River meets the Arabian Sea in Sindh, Pakistan; once fed by ~400 Mt of sediment yearly, it is now sediment-starved, eroding, and salinizing after upstream dams and barrages.
Integrated water resources management
Integrated water resources management (IWRM), defined by the Global Water Partnership in 2000, coordinates water and land management across sectors, managing water at the river basin scale sustainably and equitably.
International Joint Commission
The International Joint Commission (Commission mixte internationale) is a binational Canada–United States organization created by the 1909 Boundary Waters Treaty to prevent and resolve disputes over shared waters.
Ionian Drainages
Ionian Drainages (FEOW ecoregion 421): temperate coastal river ecoregion along western Greece, from the Thyamis and Corfu to the Peloponnese; highest fish endemism in Europe (59%), with endemic genera Tropidophoxinellus and Economidichthys.
Iriri
Iriri (Rio Iriri) is a 1,177 km river in Pará, Brazil, draining a 122,654 km² Amazonian basin; monitored by the Pedra do Ó gauge and satellite altimetry, with ENSO-linked rainfall and NDVI studies.
Irrawaddy Delta
Irrawaddy (Ayeyarwady) Delta, Myanmar's tide-dominated delta at the Andaman Sea, ~35,000 km² rice bowl; eroding west, accreting east coast; struck by Cyclone Nargis 2008.