Medium-term fluvial island evolution in a disturbed gravel-bed river (Piave River, Northeastern Italian Alps)

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dc.contributor.authorPicco, Lorenzo
dc.contributor.authorMao, Luca
dc.contributor.authorRainato, Riccardo
dc.contributor.authorLenzi, Mario A.
dc.date.accessioned2025-01-23T21:47:07Z
dc.date.available2025-01-23T21:47:07Z
dc.date.issued2014
dc.description.abstractRiver islands are defined as discrete areas of woodland vegetation surrounded by either water-filled channels or exposed gravel. They exhibit some stability and are not submerged during bank-full flows. The aim of the study is to analyze the dynamics of established, building, and pioneer islands in a 30-km-long reach of the gravel-bed Piave River, which has suffered from intense and multiple human impacts. Plan-form changes of river features since 1960 were analyzed using aerial photographs, and a LiDAR was used to derive the maximum, minimum and mean elevation of island surfaces, and maximum and mean height of their vegetation. The results suggest that established islands lie at a higher elevation than building and pioneer islands, and have a thicker layer of fine sediments deposited on their surface after big floods. After the exceptional flood in 1966 (RI > 200 years) there was a moderate increase in island numbers and extension, followed by a further increase from 1991, due to a succession of flood events in 1993 and 2002 with RI > 10 years, as well as a change in the human management relating to the control of gravel-mining activities. The narrowing trend (1960-1999) of the morphological plan form certainly enhanced the chance of islands becoming established and this explains the reduction of the active channel, the increase in established islands and reduction of pioneer islands.
dc.fuente.origenWOS
dc.identifier.doi10.1111/geoa.12034
dc.identifier.eissn1468-0459
dc.identifier.issn0435-3676
dc.identifier.urihttps://doi.org/10.1111/geoa.12034
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101735
dc.identifier.wosidWOS:000332081600006
dc.issue.numero1
dc.language.isoen
dc.pagina.final97
dc.pagina.inicio83
dc.revistaGeografiska annaler series a-physical geography
dc.rightsacceso restringido
dc.subjectriver islands
dc.subjectPiave River
dc.subjectgravel-bed rivers
dc.titleMedium-term fluvial island evolution in a disturbed gravel-bed river (Piave River, Northeastern Italian Alps)
dc.typeartículo
dc.volumen96
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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