This article is about river islands as geomorphic formations. For the UK retailer, see River Island.
"Towheads" redirects here. For the 2013 film, see Towheads (film).
For islands located completely within a river, see Ait.
A river island is any exposed landmass surrounded by river water.[citation needed] Properly defined, it excludes shoals between seasonally varying flows and may exclude semi-coastal islands in river deltas such as Marajó.
These islands result from changes in the course of a river. Such changes may be caused by interactions with a tributary, or by the opposing fluvial actions of deposition and/or erosion that form a natural cut and meander. Nascent vegetation-free shoals and mudflats may dissipate and shift or build up into such islands through deposition; the process may be assisted through artificial reinforcement or natural factors, such as reeds, palms, evergreen trees or willows, that act as obstacles or erosion barriers, so that water flows around them. Islands may be small or large, covering many square kilometers, examples of which are given below.
In England, a river island in the Thames is referred to as an "ait" (or "eyot").
Largest and smallestEdit
Friday Island is an example of a very small island with a solid-foundations house.
Majuli (a non-coastal landmass between two banks of a river), located in the Brahmaputra River in Assam, India, is recognised by Guinness World Records as the world's largest inhabited riverine island, at 880 square kilometres (340 sq mi).[1]
The Encyclopædia Britannica cites another large non-coastal landmass, Bananal Island (an island that divides the Araguaia River into two branches over a 320 km (200-mile) length of water), located in Tocantins, central Brazil, to be the world's largest river island instead, at 19,162 square kilometres (7,398 sq mi).[2]
However, Bananal Island is not considered a riverine island by some geologists,[who?] as they consider the Araguaia River to form two distributaries, and Bananal Island to be the landmass between these two distributed rivers.[citation needed] However, Bananal Island is technically an island as it does not touch the main landmass at any point.
Umananda Island, at 0.02 square kilometres (0.0077 sq mi), is among contenders as the smallest permanently-inhabited river island, or islet, with fixed dwellings. Umananda also lies in the Brahmaputra River. Many as tiny as Umananda or smaller, inhabited, exist on the Amazon basin and Bangladesh.[citation needed] Another island of comparable size to Umananda, Hatfield Island in the Guyandotte River in the U.S. state of West Virginia, has no permanent population, but contains several permanent buildings, namely the K–12 schools serving the city of Logan and its surrounding area plus the main branch of the Logan County public library.[3]
On canalised rivers, such as the Thames and the Seine, one-home islands exist, containing houses constructed of permanent materials. Canals reduce erosion of the islands and in particular limit the height of flash flooding by maintaining substantial "heads" of water through barrages.[citation needed] One-home islands improved by river canals include Monkey, Friday, Holm and D'Oyly Carte islands.
Lists of river islandsEdit
River islands by areaEdit
This list is incomplete; you can help by adding missing items. (May 2022)
River delta – Silt deposition landform at the mouth of a river
NotesEdit
^Due to redirecting of water from the Rangitata River, the river's southern distributary channel is now dry except after heavy rain or snow melt. As such, Rangitata Island is usually connected to the South Island mainland.
^The listed population is that of the New York City borough of Manhattan. Almost all of the borough's population lives on the island of Manhattan, but the borough also includes the following permanently populated areas:
Marble Hill, a neighborhood with a population of roughly 10,000 that was originally part of Manhattan Island, but was physically separated from the rest of the island by the opening of a canal in 1894 and in turn physically connected to the US mainland by landfill in 1914.
Randalls and Wards Islands, the collective name for three conjoined islands with about 1,600 residents, all either patients or staff of psychiatric hospitals, or occupants of homeless shelters.
^Historical Dictionary of Pyongyang, by Justin Corfield, p.227
^"2016 Census Profile - Montréal, Territoire équivalent (Census division)". Statistics Canada. 8 February 2017. Retrieved 2017-03-23.
^"U.S. Census Bureau QuickFacts: New York County (Manhattan Borough), New York; United States". www.census.gov. Retrieved 2019-09-12.
^"2016 Census Profile - Laval, Territoire équivalent (Census division)". Statistics Canada. 8 February 2017. Retrieved 2019-09-11.
^"2016 Census Profile - Richmond (Census division)". Statistics Canada. 8 February 2017. Retrieved 2019-09-11.
October 14, 2023
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This article is about river islands as geomorphic formations For the UK retailer see River Island Towheads redirects here For the 2013 film see Towheads film For islands located completely within a river see Ait A river island is any exposed landmass surrounded by river water citation needed Properly defined it excludes shoals between seasonally varying flows and may exclude semi coastal islands in river deltas such as Marajo A small inceptive river island at Sihot Bratislava SlovakiaSatellite picture of Csepel Island in Hungary which is south of Budapest city centreThese islands result from changes in the course of a river Such changes may be caused by interactions with a tributary or by the opposing fluvial actions of deposition and or erosion that form a natural cut and meander Nascent vegetation free shoals and mudflats may dissipate and shift or build up into such islands through deposition the process may be assisted through artificial reinforcement or natural factors such as reeds palms evergreen trees or willows that act as obstacles or erosion barriers so that water flows around them Islands may be small or large covering many square kilometers examples of which are given below Contents 1 Regional nomenclature 2 Largest and smallest 3 Lists of river islands 3 1 River islands by area 3 2 Most populous river islands 4 See also 5 Notes 6 ReferencesRegional nomenclature Edit nbsp Look up towhead in Wiktionary the free dictionary The term towhead implies an islet small island or shoal within a river most often the Mississippi River having a grouping or thicket of trees and is often used in the Midwestern United States Many rivers if wide enough can house considerably large islands The term towhead was popularised by Mark Twain s Adventures of Huckleberry Finn In England a river island in the Thames is referred to as an ait or eyot Largest and smallest Edit nbsp Friday Island is an example of a very small island with a solid foundations house Majuli a non coastal landmass between two banks of a river located in the Brahmaputra River in Assam India is recognised by Guinness World Records as the world s largest inhabited riverine island at 880 square kilometres 340 sq mi 1 The Encyclopaedia Britannica cites another large non coastal landmass Bananal Island an island that divides the Araguaia River into two branches over a 320 km 200 mile length of water located in Tocantins central Brazil to be the world s largest river island instead at 19 162 square kilometres 7 398 sq mi 2 However Bananal Island is not considered a riverine island by some geologists who as they consider the Araguaia River to form two distributaries and Bananal Island to be the landmass between these two distributed rivers citation needed However Bananal Island is technically an island as it does not touch the main landmass at any point Umananda Island at 0 02 square kilometres 0 0077 sq mi is among contenders as the smallest permanently inhabited river island or islet with fixed dwellings Umananda also lies in the Brahmaputra River Many as tiny as Umananda or smaller inhabited exist on the Amazon basin and Bangladesh citation needed Another island of comparable size to Umananda Hatfield Island in the Guyandotte River in the U S state of West Virginia has no permanent population but contains several permanent buildings namely the K 12 schools serving the city of Logan and its surrounding area plus the main branch of the Logan County public library 3 On canalised rivers such as the Thames and the Seine one home islands exist containing houses constructed of permanent materials Canals reduce erosion of the islands and in particular limit the height of flash flooding by maintaining substantial heads of water through barrages citation needed One home islands improved by river canals include Monkey Friday Holm and D Oyly Carte islands Lists of river islands EditRiver islands by area Edit This list is incomplete you can help by adding missing items May 2022 Name Area km2 Country RiverMarajo citation needed 40 100 Brazil Amazon River Para RiverBananal Island 19 162 Brazil Araguaia RiverRiverine Plain Moulamein Coleambally Hay Balranald citation needed 18 000 Australia Formed by the Billabong Edward and Murrumbidgee river systems in New South Wales Tupinambarana 11 850 needs update Brazil Amazon RiverBahr al Jabal Island 7 929 South Sudan Bahr al Jabal Bahr el ZerafHolland Utrecht 7 361 Netherlands Rhine River IJssel RiverIlha Grande de Gurupa 4 864 Brazil Amazon RiverMargarita Island 2 832 4 Colombia Magdalena RiverUarini Island 2 339 Brazil Uarini River Amazon RiverBoven Digul 2 171 Indonesia Digul River Kawaga RiverRichards Island 2 165 Canada Mackenzie RiverKrasnoslobodsk 2 002 Russia Volga River Akhtuba RiverVeľky Zitny ostrov 1 885 2 5 Slovakia Danube Little DanubeHatiya Island 1 508 23 Bangladesh Meghna RiverLetea Island 1 480 Romania DanubeCamargue 1 453 France Grand Rhone Petit RhoneBhola Island 1 441 Bangladesh Meghna RiverChongming Island 1 267 6 China Yangtze RiverIle a Morfil 1 250 Senegal Senegal RiverZhongshan Island 1 055 42 China Pearl RiverDibru Saikhowa 765 India Brahmaputra RiverSandwip Island 762 42 Bangladesh Meghna RiverGreat Brăila Island 720 2 Romania DanubeMajuli 553 India Brahmaputra RiverSumba Island 500 7 Democratic Republic of Congo Congo RiverMontreal 499 Canada St Lawrence River Riviere des PrairiesSzigetkoz 375 Hungary Slovakia DanubeManpura Island 373 Bangladesh MeghnaInhacamba 340 Mozambique ZambeziHoeksche Waard 323 74 Netherlands Oude Maas Nieuwe MaasYangzhong Island 320 China Yangtze RiverGunbower Island 264 Australia Murray RiverCsepel Island 257 Hungary DanubeJesus Island 242 Canada Riviere des Mille Iles Riviere des PrairiesVoorne Putten 220 Netherlands Oude Maas Nieuwe MaasHisingen 199 Sweden Gota alvMosqueiro 191 Brazil Amazon RiverMbamou Island 180 8 Republic of the Congo Congo RiverDon Khong 144 Laos MekongRoberts Island 133 9 United States San Joaquin RiverUnion Island 130 9 United States San Joaquin RiverDavis Island 120 United States Mississippi RiverTaiama Island 115 55 Brazil Paraguay RiverLulu Island 112 4 Canada Fraser RiverSarpinskiy Island 110 Russia Volga RiverSauvie Island 84 8 United States Columbia RiverDordrecht Island 79 53 Netherlands Oude Maas Hollands DiepSrirangam 74 4 India Kaveri 10 Grand Island 73 8 United States Niagara RiverRangitata Island 65 New Zealand Rangitata River a Ostrvo 60 Serbia DanubeHogg Island 59 Guyana Essequibo RiverManhattan Island 59 United States Hudson River East River Harlem CreekHengsha Island 55 74 China Yangtze RiverRusne Island 45 Lithuania NemanWakenaam Island 45 Guyana Essequibo RiverBelene Island 41 Bulgaria DanubeWoodford Island 37 Australia Clarence RiverWilhelmsburg 35 3 Germany ElbeLeguan Island 31 Guyana Essequibo RiverGrave di Papadopoli 18 Italy Piave RiverIsla Teja 15 Chile Cau Cau River Cruces River Valdivia RiverSrirangapatna 13 India KaveriShivanasamudram 11 India KaveriGrosse Ile 25 United States Detroit RiverInch Clutha 24 New Zealand Clutha RiverKhortytsia 23 59 Ukraine Dnieper RiverIsland of Sarengrad 9 Disputed Serbia Croatia DanubeYeouido 8 4 South Korea Han RiverTatyshev 7 Russia Yenisey RiverSedudu Kasikili 5 Botswana Cuando RiverHayden Island 4 4 United States Willamette RiverNanjido 2 8 South Korea a branch of the Han RiverOtdyha Island 2 5 Russia Yenisey RiverWheeling Island 1 5 United States Ohio RiverRŭngrado 1 3 North Korea Taedong RiverYanggakdo 1 2 12 North Korea Taedong RiverNakanoshima 0 7 Japan Kyu Yodo RiverZhenbao Island 0 7 China Ussuri RiverBhavani Island 0 53 India Krishna RiverBamseom 0 24 South Korea Han RiverIle de la Cite 0 2 France SeineNakasu 0 2 Japan Nakagawa RiverPrince s Island Park 0 2 Canada Bow RiverIsland of Vukovar 0 032 Disputed Serbia Croatia DanubeUmananda Island 0 02 India Brahmaputra RiverHatfield Island 0 17 United States Guyandotte RiverSome Sevit Gavit Chavit Solvit Yevit 0 0104 0 0048 0 0034 0 0012 0 0008 South Korea Han RiverPheasant Island 0 00682 Condominium between France and Spain BidasoaNote Includes some river islands that also have an ocean coast Most populous river islands Edit This list ranks river islands with a population of at least 25 000 Name Population Area km2 Country City RiverSalsette Island 15 111 974 619 India Mumbai and Thane Vasai Creek Thane CreekIle de Montreal 1 942 044 2016 13 499 Canada Montreal Riviere des Prairies St Lawrence RiverManhattan Island 1 628 701 2018 14 b 59 United States New York City Hudson River East RiverChongming Island 660 000 2010 1 267 China Shanghai Yangtze RiverJesus Island 422 993 2016 15 242 Canada Laval Riviere des Mille Iles Riviere des PrairiesVeľky Zitny ostrov 226 446 2001 1 885 Slovakia Bratislava Komarno Dunajska Streda and others Danube Little DanubeVasilievsky Island 209 188 2017 10 9 Russia St Petersburg Bolshaya Neva Malaya NevaLulu Island 198 309 2016 16 122 4 Canada Richmond FraserSrirangam 181 556 2001 13 India Srirangam KaveriBangkok Noi 179 814 2017 18 Thailand Bangkok Chao Phraya RiverMajuli 167 304 2011 422 India Vaishnavite Shrines Brahmaputra RiverCsepel Island 166 953 2012 257 Hungary several DanubeHisingen 130 000 199 Sweden Gothenburg Gota alvNavotas Island 117 196 1 95 Philippines Navotas Metro Manila Tullahan RiverWilhelmsburg 49 132 2006 35 3 Germany Hamburg ElbeYeouido 30 988 2006 8 4 South Korea Seoul Han RiverMosqueiro 27 000 191 Brazil Belem Amazon RiverSee also Edit nbsp Islands portalAit Islands found on the River Thames and its tributaries in England Anabranch A section of a river or stream that diverts from the main channel and rejoins it downstream Archipelago Collection of islands Distributary Stream branching off from main stream channel Fluvial landforms Processes associated with rivers and streams Island Piece of subcontinental land completely surrounded by water Lake island Island located in a lake Point bar Landform related to streams and rivers River bifurcation The forking of a river into its distributaries River delta Silt deposition landform at the mouth of a riverNotes Edit Due to redirecting of water from the Rangitata River the river s southern distributary channel is now dry except after heavy rain or snow melt As such Rangitata Island is usually connected to the South Island mainland The listed population is that of the New York City borough of Manhattan Almost all of the borough s population lives on the island of Manhattan but the borough also includes the following permanently populated areas Marble Hill a neighborhood with a population of roughly 10 000 that was originally part of Manhattan Island but was physically separated from the rest of the island by the opening of a canal in 1894 and in turn physically connected to the US mainland by landfill in 1914 Randalls and Wards Islands the collective name for three conjoined islands with about 1 600 residents all either patients or staff of psychiatric hospitals or occupants of homeless shelters Roosevelt Island located in the East River between Manhattan Island and Queens with a population of nearly 12 000 References Edit Majuli River Island Largest river island Guinness World Records Retrieved 6 September 2016 Ilha do Bananal River Island Bananal Island Britannica Retrieved 5 August 2020 Spence Robert Y February 21 2012 Hatfield Island The West Virginia Encyclopedia Retrieved June 12 2020 Rio Grande de la Magdalena Coleccion Ecologica del Banco Retrieved 3 January 2015 Zitny ostrov Retrieved 3 January 2015 崇明县 www shanghai gov cn Largest Islands of Countries Retrieved 3 January 2015 Malebo Pool Encyclopaedia Britannica Accessed June 2017 a b SUMMARY REPORT ROBERTS ISLAND AND UNION ISLAND RIPARIAN WATER RIGHTS INVESTIGATION SAN JOAQUIN COUNTY CA JUNE 2008 PDF W Francis 1906 Gazetteer of South India p 199 Shivanasamudra Historical Dictionary of Pyongyang by Justin Corfield p 227 2016 Census Profile Montreal Territoire equivalent Census division Statistics Canada 8 February 2017 Retrieved 2017 03 23 U S Census Bureau QuickFacts New York County Manhattan Borough New York United States www census gov Retrieved 2019 09 12 2016 Census Profile Laval Territoire equivalent Census division Statistics Canada 8 February 2017 Retrieved 2019 09 11 2016 Census Profile Richmond Census division Statistics Canada 8 February 2017 Retrieved 2019 09 11 Retrieved from https en wikipedia org w index php title River island amp oldid 1175976277, wikipedia, wiki, book, books, library,
