Alviela River (Portuguese: Rio Alviela, Portuguese pronunciation:[alviˈɛlɐ]) is a river in Portugal. It is 51.16 kilometres (31.79 mi) long.[3] The Alviela spring is one of the deepest in the world and is locally connected to a cave complex that represents the most significant fluvio-karstic phenomena in Portugal, one which supports several bat colonies with more than 5,000 bats in total.[4] In 2007, a population of troglomorphicProcambarus clarkii, an invasivecrayfish species, was recorded in the Alviela spring, raising concerns about their potential effect on native stygobitic fauna. These crayfish lack all body pigment, although pigmented specimens were recorded in nearby surface waters.[5]
The river has its origin in a karst spring. Ribeira dos Amiais, a losing stream, infiltrates through the Sumidouro da Ribeira dos Amiais, a ponor, only to return to the surface 250 m further on through a canyon.[6]
Ribeira dos Amiais, tributary of Alviela
Sumidouro da ribeira dos Amiais, were the water from the stream infiltrates
Referencesedit
^ ab"Conhecer o Rio Alviela" (PDF). Retrieved 22 May 2021.
^ ab"Nascente dos Olhos de Água do Alviela, Alcanena". www.roteirodeminas.pt (in Portuguese). Retrieved 21 May 2021.
^"Rio Alviela". snirh.inag.pt (in Portuguese). Archived from the original on 2012-01-26. Retrieved 2012-09-22.
^"Mira Minde Polje and related Springs | Ramsar Sites Information Service". rsis.ramsar.org. Retrieved 21 May 2021.
^Mazza, Giuseppe; Sofia, Ana; Reboleira, P.S.; Goncalves, Fernando; Aquiloni, Laura; Inghilesi, Alberto; Spigoli, Daniele; Stoch, Fabio; Taiti, Stefano; Gherardi, Francesca; Tricarico, Elena (2014). "A New Threat to Groundwater Ecosystems: First Occurrences of the Invasive Crayfish Procambarus clarkii (Girard, 1852) in European Caves". Journal of Cave and Karst Studies. 86 (1): 62–65. doi:10.4311/2013LSC0115.
^"Ribeira dos Amiais, um trilho pela perda e ressurgência do PNSAC". Viajar entre Viagens (in European Portuguese). 2020-04-15. Retrieved 22 May 2021.
alviela, river, portuguese, alviela, portuguese, pronunciation, alviˈɛlɐ, river, portugal, kilometres, long, alviela, spring, deepest, world, locally, connected, cave, complex, that, represents, most, significant, fluvio, karstic, phenomena, portugal, which, s. Alviela River Portuguese Rio Alviela Portuguese pronunciation alviˈɛlɐ is a river in Portugal It is 51 16 kilometres 31 79 mi long 3 The Alviela spring is one of the deepest in the world and is locally connected to a cave complex that represents the most significant fluvio karstic phenomena in Portugal one which supports several bat colonies with more than 5 000 bats in total 4 In 2007 a population of troglomorphic Procambarus clarkii an invasive crayfish species was recorded in the Alviela spring raising concerns about their potential effect on native stygobitic fauna These crayfish lack all body pigment although pigmented specimens were recorded in nearby surface waters 5 AlvielaPhysical characteristicsSource locationOlhos d Agua do Alviela Alcanena elevation135 m 443 ft MouthTagus locationnear Vale de Figueira 1 elevation23 m 75 ft Length51 16 km 31 79 mi Basin size180 km2 69 sq mi 2 331 km2 128 sq mi 1 Discharge maximum17 m3 s 600 cu ft s 2 Basin featuresTributariesRibeira dos Amiais Ribeira de Carvalhos Ribeira da GouxariaTagus Basin The river has its origin in a karst spring Ribeira dos Amiais a losing stream infiltrates through the Sumidouro da Ribeira dos Amiais a ponor only to return to the surface 250 m further on through a canyon 6 Ribeira dos Amiais tributary of Alviela Sumidouro da ribeira dos Amiais were the water from the stream infiltratesReferences edit a b Conhecer o Rio Alviela PDF Retrieved 22 May 2021 a b Nascente dos Olhos de Agua do Alviela Alcanena www roteirodeminas pt in Portuguese Retrieved 21 May 2021 Rio Alviela snirh inag pt in Portuguese Archived from the original on 2012 01 26 Retrieved 2012 09 22 Mira Minde Polje and related Springs Ramsar Sites Information Service rsis ramsar org Retrieved 21 May 2021 Mazza Giuseppe Sofia Ana Reboleira P S Goncalves Fernando Aquiloni Laura Inghilesi Alberto Spigoli Daniele Stoch Fabio Taiti Stefano Gherardi Francesca Tricarico Elena 2014 A New Threat to Groundwater Ecosystems First Occurrences of the Invasive Crayfish Procambarus clarkii Girard 1852 in European Caves Journal of Cave and Karst Studies 86 1 62 65 doi 10 4311 2013LSC0115 Ribeira dos Amiais um trilho pela perda e ressurgencia do PNSAC Viajar entre Viagens in European Portuguese 2020 04 15 Retrieved 22 May 2021 39 17 40 N 8 36 58 W 39 29444 N 8 61611 W 39 29444 8 61611 This article related to a river in Portugal is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Alviela River amp oldid 1167295753, wikipedia, wiki, book, books, library,
