414 articles
Horseshoe Falls
Horseshoe Falls, also called the Canadian Falls, is the largest of Niagara Falls' three waterfalls, carrying about 90 percent of the river's flow on the Canadian side of the border.
Hot spring
Hot spring: a spring discharging groundwater heated by hot rock, often volcanic. Also called onsen (温泉) in Japan. Key facts: Yellowstone's 10,000+ thermal features, 1948 onsen law, 1832 Hot Springs Reservation, hydrotherapy evidence.
Hot springs of Australia
The hot springs of Australia are more than 50 thermal springs and pools heated by geothermal groundwater rather than volcanism, many tied to the Great Artesian Basin.
Hot springs of Central America and the Caribbean
The hot springs of Central America and the Caribbean are thermal springs from Guatemala to Panama and on Caribbean volcanic islands, heated by subduction and arc volcanism.
Hot springs of China
The hot springs of China number over 2,700, concentrated in Yunnan, Tibet, and the south, with a 3,000-year bathing tradition and a resort industry worth 242.83 billion yuan in 2017.
Hot springs of Mexico
The hot springs of Mexico are groundwater discharges heated by the Trans-Mexican Volcanic Belt, numbering more than 1,306 sites across 21 states, feeding resorts like Grutas de Tolantongo.
Hot springs of Mongolia and Central Asia
The hot springs of Mongolia and Central Asia are thermal waters emerging across Inner Asia's mountain belts without active volcanism, many developed into Soviet-era sanatoriums, several still operating.
Hot springs of Taiwan
The hot springs of Taiwan (台湾温泉) are thermal springs found island-wide, created by colliding tectonic plates and ranked among the world's top 15 hot spring destinations.
Hot springs of the Andes
The hot springs of the Andes are thermal springs of Pacific South America, heated by subduction-related volcanism and deep faults and used for bathing and resorts.
Hot springs of the Pacific islands
The hot springs of the Pacific islands are thermal springs across Melanesia, including near-boiling pools at Savusavu, Fiji, and 100°C springs on Savo volcano, Solomon Islands.
Hot springs of the US Pacific coast and Alaska
The hot springs of the US Pacific coast and Alaska are thermal springs in California, Oregon, Washington, and Alaska, heated mostly by deep circulation through hot rock.
Hot Sulphur Springs, Colorado
Hot Sulphur Springs is the county seat of Grand County, Colorado, a town built around natural hot springs on the Colorado River in Middle Park.
Huka Falls
Huka Falls, on the Waikato River near Taupō, New Zealand, is the river's largest waterfall, where the flow narrows to about 15 m and surges at roughly 220,000 litres per second; name means foam, height varies 7–11 m.
Humedales del Delta del Río Colorado
Humedales del Delta del Río Colorado: two Ramsar wetland sites (814, 1996, 250,000 ha; 1822, 2008, 127,614 ha) in Baja California and Sonora, Mexico, desert wetlands on the Pacific Flyway fed by canal seepage and irrigation return flows.
Hutt Lagoon
Hutt Lagoon (Pink Lake) is a ~70 km² hypersaline coastal brine lagoon near Port Gregory, Western Australia, pink from Dunaliella salina carotenoids, hosting the world's largest microalgae beta-carotene farm and a former 1924 salt industry.
Hydrogeomorphic approach to wetland classification and assessment
The hydrogeomorphic (HGM) approach is a US method for classifying wetlands and scoring their ecological functions, developed by the Army Corps of Engineers in the early 1990s.
Hydrosere
Hydrosere: the seral sequence of ecological succession beginning in open water (pond, lake, swamp), also called hydrarch succession, running from phytoplankton through marsh stages toward a terrestrial climax; counterpart of the xerosere.
Iguazu Falls
Iguazu Falls (Cataratas del Iguazú / Cataratas do Iguaçu): about 275 cascades up to 80 m high across a 2.7 km front on the Argentina–Brazil border; UNESCO World Heritage since 1984/1986 and a New 7 Wonders of Nature site (2012).
Impatiens capensis
Impatiens capensis (orange jewelweed, spotted touch-me-not; synonym I. biflora) is a North American annual wetland herb with orange spurred flowers, explosive 4.2 ms seed pod dehiscence, cleistogamous flowers, and introduced populations in Europe and western North America.
Inner Niger Delta
The Inner Niger Delta (Delta intérieur du Niger) is a vast inland floodplain in central Mali, defined by the spreading Niger and Bani rivers between Djenné and Tombouctou.
Interdunal wetland
Interdunal wetland, also called dune slack, is a wetland in depressions between dunes or beach ridges with a fluctuating water table; Great Lakes, European, Californian, and desert variants are imperiled, hydrologically sensitive habitats.
Jacumba Hot Springs, California
Jacumba Hot Springs, formerly known as Jacumba, is a small desert community in southeastern San Diego County, California, on the Mexican border, built around natural hot springs.
Jermuk
Jermuk (Ջերմուկ), Armenian spa town in Vayots Dzor at 2,080 m, about 170 km from Yerevan, built on some 40 thermal mineral springs (57-64 °C) compared with Karlovy Vary; Soviet resort founded 1940, source of Jermuk bottled water.
Jog Falls (ಜೋಗ ಜಲಪಾತ)
Jog Falls (ಜೋಗ ಜಲಪಾತ), also Gerusoppa Falls or Jogada Gundi, is a 253 m plunge waterfall of the Sharavathi River in Shivamogga, Karnataka, with four cascades (Raja, Roarer, Rocket, Rani), regulated by the Linganamakki Dam.
Juncaceae
Juncaceae, the rush family (Juncaceae Juss., 1789), is a Poales family of grass-like herbs with six tepals, six stamens, and loculicidal capsules; about 485 species in seven accepted genera including Juncus and Luzula, sister to Cyperaceae.
Juncus effusus
Juncus effusus, soft rush or common rush, a tufted Juncaceae wetland perennial to 120 cm with leafless stems and side-appearing inflorescences; widespread, weedy in grasslands, used for mats, restoration, and phytoremediation.
Kaieteur Falls
Kaieteur Falls, on the Potaro River in Guyana's Kaieteur National Park, drops 226 m (741 ft) in a single plunge with up to 663 m³/s flow, the world's largest single-drop waterfall by volume; discovered in 1870 by Charles Barrington Brown.
Kakabeka Falls
Kakabeka Falls is a 40-meter waterfall on the Kaministiquia River about 29 kilometers west of Thunder Bay, Ontario, the centerpiece of a provincial park established in 1957.
Kalambo Falls
Kalambo Falls is a waterfall and archaeological site in Northern Province, Zambia, near Lake Tanganyika, where excavations since 1953 uncovered the oldest known wooden structure, at least 476,000 years old.
Kalliroe
Kalliroe (Kallirrhoe, Callirrhoe), ancient thermal springs at 'Ain ez-Zara on the Dead Sea's eastern shore in Jordan; famed resort where Herod the Great sought a cure before his death in 4 BCE.