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Hong Kong Wetland Park (香港湿地公园)
Hong Kong Wetland Park (香港湿地公园), opened 20 May 2006 in Tin Shui Wai, is a 61-hectare ecotourism and conservation facility with a 10,000 m² Visitor Centre and 60-hectare Wetland Reserve built on an ecological mitigation area.
Hongze Lake
Hongze Lake (洪泽湖), Jiangsu, China: fourth largest freshwater lake, a shallow impounded lake formed by the 1128 Yellow River capture and Ming-Qing levees; Huai River reservoir and South-to-North Water Diversion eastern-route storage.
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.
Hood Canal
Hood Canal: fjord-like arm of western Puget Sound, Washington, 68 miles long, named by Vancouver in 1792 for Lord Samuel Hood; known for seasonal low dissolved oxygen, fish kills, and major shellfish harvest areas.
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.
Hoplobatrachus tigerinus
Hoplobatrachus tigerinus, the Indian bullfrog (formerly Rana tigerina), is a large dicroglossid frog native to South Asian wetlands, Least Concern by IUCN, CITES Appendix II since 1985, and invasive in the Andamans, Madagascar, and Maldives.
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.
Hottah
Hottah usually means Hottah Lake, a large dimictic lake (842.81 km²) on the Camsell River in the Northwest Territories, Canada, with Tłı̨chǫ name origin, 1950s uranium mining, and a commercial trout and whitefish fishery; also a smaller namesake lake in British Columbia and the Hottah terrane.
Houtman
Houtman is a marine ecoregion of Western Australia's mid-west coast, covering the waters around the Houtman Abrolhos Islands, which hold the Indian Ocean's highest-latitude coral reefs.
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 Bay
Hudson Bay: large shallow seasonally ice-covered inland sea in central Canada, ~1.2 million km², receiving ~900 km³/yr river runoff; declining sea ice, isostatic rebound, Hudson's Bay Company history, polar bears, and Port of Churchill shipping.
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.
Hudson Strait
Hudson Strait is a long channel in northern Canada, between Baffin Island and Quebec, linking Hudson Bay and Foxe Basin to the Labrador Sea; first recorded in 1578.
Hughes Bay
Hughes Bay, also Bahía Hughes, is a bay between Cape Sterneck and Cape Murray on the Danco Coast, west Antarctic Peninsula, named for sealer Edward Hughes (1824-25) and site of the first recorded Antarctic mainland landing by John Davis, 7 February 1821.
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.
Hulun
Hulun Lake (呼伦湖), also Dalai Lake, a large shallow lake in Inner Mongolia, China; fifth-largest in China, fed by the Kherlen and Wuershun rivers, with severe 2000s water-level decline and later recovery.
Humber
The Humber is England's largest-catchment macro-tidal estuary, formed by the Trent and Ouse, home to the UK's biggest port complex, over 500,000 people at tidal flood risk, and internationally important waterbird habitats.