Flood Consequences of Land‐Use Changes at a Ski Resort: Overcoming a Geomorphological Threshold (Portainé, Eastern Pyrenees, Iberian Peninsula)

The sensitive mountain catchment of Portainé (Eastern Pyrenees, Iberian Peninsula) has recently experienced a significant change in its torrential dynamics due to human disturbances. The emplacement of a ski resort at the headwaters led to the surpassing of a geomorphological threshold, with importa...

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Autores: Furdada i Bellavista, Glòria, Victoriano Lamariano, Ane, Díez-Herrero, Andrés, Génova, Mar, Guinau Sellés, Marta, De las Heras, Álvaro, Palau, Rosa Ma., Hürlimann, Marcel, Khazaradze, Giorgi, Casas Tuset, Josep Maria, Margalef Porcar, Aina, Pinyol, Jordi, González, Marta
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/155355
Acceso en línea:https://hdl.handle.net/2445/155355
Access Level:acceso abierto
Palabra clave:Pirineus
Inundacions
Estacions d'esquí
Geomorfologia
Influència de l'home en la natura
Pyrenees
Floods
Ski resorts
Geomorphology
Effect of human beings on nature
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spelling Flood Consequences of Land‐Use Changes at a Ski Resort: Overcoming a Geomorphological Threshold (Portainé, Eastern Pyrenees, Iberian Peninsula)Furdada i Bellavista, GlòriaVictoriano Lamariano, AneDíez-Herrero, AndrésGénova, MarGuinau Sellés, MartaDe las Heras, ÁlvaroPalau, Rosa Ma.Hürlimann, MarcelKhazaradze, GiorgiCasas Tuset, Josep MariaMargalef Porcar, AinaPinyol, JordiGonzález, MartaPirineusInundacionsEstacions d'esquíGeomorfologiaInfluència de l'home en la naturaPyreneesFloodsSki resortsGeomorphologyEffect of human beings on natureThe sensitive mountain catchment of Portainé (Eastern Pyrenees, Iberian Peninsula) has recently experienced a significant change in its torrential dynamics due to human disturbances. The emplacement of a ski resort at the headwaters led to the surpassing of a geomorphological threshold, with important consequences during flood events. Consequently, since 2008, channel dynamics have turned into sediment‐laden, highly destructive torrential flows. In order to assess this phenomenon and to acquire a holistic understanding of the catchment's behaviour, we carried out a field work‐based multidisciplinary study. We considered the interaction of the various controlling factors, including bedrock geology, geomorphological evolution, derived soils and coluvial deposits, rainfall patterns, and the hydrological response of the catchment to flood events. Moreover, anthropogenic land‐use changes, its consequential hydrogeomorphic effects and the role of vegetation were also taken into account. Robust sedimentological and geomorphological evidence of ancient dense debris flows show that the basin has shifted around this threshold, giving rise to two different behaviours or equilibrium conditions throughout its history: alternating periods of moderate, bedload‐laden flows and periods of high sediment‐laden debris flow dynamics. This shifting could have extended through the Holocene. Finally, we discuss the possible impact of climate and global change, as the projected effects suggest future soil and forest degradation; this, jointly with more intense rainfalls in these mountain environments, would exacerbate the future occurrence of dense sediment‐laden flows at Portainé, but also in other nearby, similar basins.MDPI2020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/155355Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.3390/w12020368Water, 2020, vol. 12, num. 2, p. 368https://doi.org/10.3390/w12020368cc-by (c) Furdada i Bellavista, Glòria et al., 2020http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1553552026-05-27T06:46:51Z
dc.title.none.fl_str_mv Flood Consequences of Land‐Use Changes at a Ski Resort: Overcoming a Geomorphological Threshold (Portainé, Eastern Pyrenees, Iberian Peninsula)
title Flood Consequences of Land‐Use Changes at a Ski Resort: Overcoming a Geomorphological Threshold (Portainé, Eastern Pyrenees, Iberian Peninsula)
spellingShingle Flood Consequences of Land‐Use Changes at a Ski Resort: Overcoming a Geomorphological Threshold (Portainé, Eastern Pyrenees, Iberian Peninsula)
Furdada i Bellavista, Glòria
Pirineus
Inundacions
Estacions d'esquí
Geomorfologia
Influència de l'home en la natura
Pyrenees
Floods
Ski resorts
Geomorphology
Effect of human beings on nature
title_short Flood Consequences of Land‐Use Changes at a Ski Resort: Overcoming a Geomorphological Threshold (Portainé, Eastern Pyrenees, Iberian Peninsula)
title_full Flood Consequences of Land‐Use Changes at a Ski Resort: Overcoming a Geomorphological Threshold (Portainé, Eastern Pyrenees, Iberian Peninsula)
title_fullStr Flood Consequences of Land‐Use Changes at a Ski Resort: Overcoming a Geomorphological Threshold (Portainé, Eastern Pyrenees, Iberian Peninsula)
title_full_unstemmed Flood Consequences of Land‐Use Changes at a Ski Resort: Overcoming a Geomorphological Threshold (Portainé, Eastern Pyrenees, Iberian Peninsula)
title_sort Flood Consequences of Land‐Use Changes at a Ski Resort: Overcoming a Geomorphological Threshold (Portainé, Eastern Pyrenees, Iberian Peninsula)
dc.creator.none.fl_str_mv Furdada i Bellavista, Glòria
Victoriano Lamariano, Ane
Díez-Herrero, Andrés
Génova, Mar
Guinau Sellés, Marta
De las Heras, Álvaro
Palau, Rosa Ma.
Hürlimann, Marcel
Khazaradze, Giorgi
Casas Tuset, Josep Maria
Margalef Porcar, Aina
Pinyol, Jordi
González, Marta
author Furdada i Bellavista, Glòria
author_facet Furdada i Bellavista, Glòria
Victoriano Lamariano, Ane
Díez-Herrero, Andrés
Génova, Mar
Guinau Sellés, Marta
De las Heras, Álvaro
Palau, Rosa Ma.
Hürlimann, Marcel
Khazaradze, Giorgi
Casas Tuset, Josep Maria
Margalef Porcar, Aina
Pinyol, Jordi
González, Marta
author_role author
author2 Victoriano Lamariano, Ane
Díez-Herrero, Andrés
Génova, Mar
Guinau Sellés, Marta
De las Heras, Álvaro
Palau, Rosa Ma.
Hürlimann, Marcel
Khazaradze, Giorgi
Casas Tuset, Josep Maria
Margalef Porcar, Aina
Pinyol, Jordi
González, Marta
author2_role author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Pirineus
Inundacions
Estacions d'esquí
Geomorfologia
Influència de l'home en la natura
Pyrenees
Floods
Ski resorts
Geomorphology
Effect of human beings on nature
topic Pirineus
Inundacions
Estacions d'esquí
Geomorfologia
Influència de l'home en la natura
Pyrenees
Floods
Ski resorts
Geomorphology
Effect of human beings on nature
description The sensitive mountain catchment of Portainé (Eastern Pyrenees, Iberian Peninsula) has recently experienced a significant change in its torrential dynamics due to human disturbances. The emplacement of a ski resort at the headwaters led to the surpassing of a geomorphological threshold, with important consequences during flood events. Consequently, since 2008, channel dynamics have turned into sediment‐laden, highly destructive torrential flows. In order to assess this phenomenon and to acquire a holistic understanding of the catchment's behaviour, we carried out a field work‐based multidisciplinary study. We considered the interaction of the various controlling factors, including bedrock geology, geomorphological evolution, derived soils and coluvial deposits, rainfall patterns, and the hydrological response of the catchment to flood events. Moreover, anthropogenic land‐use changes, its consequential hydrogeomorphic effects and the role of vegetation were also taken into account. Robust sedimentological and geomorphological evidence of ancient dense debris flows show that the basin has shifted around this threshold, giving rise to two different behaviours or equilibrium conditions throughout its history: alternating periods of moderate, bedload‐laden flows and periods of high sediment‐laden debris flow dynamics. This shifting could have extended through the Holocene. Finally, we discuss the possible impact of climate and global change, as the projected effects suggest future soil and forest degradation; this, jointly with more intense rainfalls in these mountain environments, would exacerbate the future occurrence of dense sediment‐laden flows at Portainé, but also in other nearby, similar basins.
publishDate 2020
dc.date.none.fl_str_mv 2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/155355
url https://hdl.handle.net/2445/155355
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.3390/w12020368
Water, 2020, vol. 12, num. 2, p. 368
https://doi.org/10.3390/w12020368
dc.rights.none.fl_str_mv cc-by (c) Furdada i Bellavista, Glòria et al., 2020
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Furdada i Bellavista, Glòria et al., 2020
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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