Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction

Autores
Fernández, Alfonso; Muñoz, Ariel; González Reyes, Álvaro; Aguilera Betti, Isabella; Toledo, Isadora; Puchi, Paulina; Sauchyn, David; Crespo, Sebastián Andrés; Frene, Cristian; Mundo, Ignacio Alberto; González, Mauro; Vignola, Raffaele
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Streamflow in south-central Chile (SCC, ∼ 37–42∘ S) is vital for agriculture, forestry production, hydroelectricity, and human consumption. Recent drought episodes have generated hydrological deficits with damaging effects on these activities. This region is projected to undergo major reductions in water availability, concomitant with projected increases in water demand. However, the lack of long-term records hampers the development of accurate estimations of natural variability and trends. In order to provide more information on long-term streamflow variability and trends in SCC, here we report findings of an analysis of instrumental records and a tree-ring reconstruction of the summer streamflow of the Río Imperial (∼ 37∘ 40′ S–38∘ 50′ S). This is the first reconstruction in Chile targeted at this season. Results from the instrumental streamflow record (∼ 1940 onwards) indicated that the hydrological regime is fundamentally pluvial with a small snowmelt contribution during spring, and evidenced a decreasing trend, both for the summer and the full annual record. The reconstruction showed that streamflow below the average characterized the post-1980 period, with more frequent, but not more intense, drought episodes. We additionally found that the recent positive phase of the Southern Annular Mode has significantly influenced streamflow. These findings agree with previous studies, suggesting a robust regional signal and a shift to a new hydrological scenario. In this paper, we also discuss implications of these results for water managers and stakeholders; we provide rationale and examples that support the need for the incorporation of tree-ring reconstructions into water resources management.
Fil: Fernández, Alfonso. Universidad de Concepción; Chile
Fil: Muñoz, Ariel. Pontificia Universidad Católica de Valparaíso; Chile
Fil: González Reyes, Álvaro. Universidad Austral de Chile; Chile
Fil: Aguilera Betti, Isabella. Pontificia Universidad Católica de Valparaíso; Chile
Fil: Toledo, Isadora. Pontificia Universidad Católica de Valparaíso; Chile
Fil: Puchi, Paulina. Pontificia Universidad Católica de Valparaíso; Chile
Fil: Sauchyn, David. University of Regina; Canadá
Fil: Crespo, Sebastián Andrés. Pontificia Universidad Católica de Valparaíso; Chile
Fil: Frene, Cristian. Pontificia Universidad Católica de Chile; Chile
Fil: Mundo, Ignacio Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: González, Mauro. Universidad Austral de Chile; Chile
Fil: Vignola, Raffaele. Cátedra Latinoamericana en Decisiones Ambientales para el Cambio Global; Costa Rica
Materia
DENDROHYDROLOGY
WATER RESOURCES MANAGEMENT
SOUTH-CENTRAL CHILE
RÍO IMPERIAL
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/88449
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/88449
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstructionFernández, AlfonsoMuñoz, ArielGonzález Reyes, ÁlvaroAguilera Betti, IsabellaToledo, IsadoraPuchi, PaulinaSauchyn, DavidCrespo, Sebastián AndrésFrene, CristianMundo, Ignacio AlbertoGonzález, MauroVignola, RaffaeleDENDROHYDROLOGYWATER RESOURCES MANAGEMENTSOUTH-CENTRAL CHILERÍO IMPERIALhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Streamflow in south-central Chile (SCC, ∼ 37–42∘ S) is vital for agriculture, forestry production, hydroelectricity, and human consumption. Recent drought episodes have generated hydrological deficits with damaging effects on these activities. This region is projected to undergo major reductions in water availability, concomitant with projected increases in water demand. However, the lack of long-term records hampers the development of accurate estimations of natural variability and trends. In order to provide more information on long-term streamflow variability and trends in SCC, here we report findings of an analysis of instrumental records and a tree-ring reconstruction of the summer streamflow of the Río Imperial (∼ 37∘ 40′ S–38∘ 50′ S). This is the first reconstruction in Chile targeted at this season. Results from the instrumental streamflow record (∼ 1940 onwards) indicated that the hydrological regime is fundamentally pluvial with a small snowmelt contribution during spring, and evidenced a decreasing trend, both for the summer and the full annual record. The reconstruction showed that streamflow below the average characterized the post-1980 period, with more frequent, but not more intense, drought episodes. We additionally found that the recent positive phase of the Southern Annular Mode has significantly influenced streamflow. These findings agree with previous studies, suggesting a robust regional signal and a shift to a new hydrological scenario. In this paper, we also discuss implications of these results for water managers and stakeholders; we provide rationale and examples that support the need for the incorporation of tree-ring reconstructions into water resources management.Fil: Fernández, Alfonso. Universidad de Concepción; ChileFil: Muñoz, Ariel. Pontificia Universidad Católica de Valparaíso; ChileFil: González Reyes, Álvaro. Universidad Austral de Chile; ChileFil: Aguilera Betti, Isabella. Pontificia Universidad Católica de Valparaíso; ChileFil: Toledo, Isadora. Pontificia Universidad Católica de Valparaíso; ChileFil: Puchi, Paulina. Pontificia Universidad Católica de Valparaíso; ChileFil: Sauchyn, David. University of Regina; CanadáFil: Crespo, Sebastián Andrés. Pontificia Universidad Católica de Valparaíso; ChileFil: Frene, Cristian. Pontificia Universidad Católica de Chile; ChileFil: Mundo, Ignacio Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: González, Mauro. Universidad Austral de Chile; ChileFil: Vignola, Raffaele. Cátedra Latinoamericana en Decisiones Ambientales para el Cambio Global; Costa RicaCopernicus Publications2018-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/88449Fernández, Alfonso; Muñoz, Ariel; González Reyes, Álvaro; Aguilera Betti, Isabella; Toledo, Isadora; et al.; Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction; Copernicus Publications; Hydrology And Earth System Sciences; 22; 5; 5-2018; 2921-29351607-7938CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.hydrol-earth-syst-sci.net/22/2921/2018/info:eu-repo/semantics/altIdentifier/doi/10.5194/hess-22-2921-2018info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:09:56Zoai:ri.conicet.gov.ar:11336/88449instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:09:57.184CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction
title Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction
spellingShingle Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction
Fernández, Alfonso
DENDROHYDROLOGY
WATER RESOURCES MANAGEMENT
SOUTH-CENTRAL CHILE
RÍO IMPERIAL
title_short Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction
title_full Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction
title_fullStr Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction
title_full_unstemmed Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction
title_sort Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction
dc.creator.none.fl_str_mv Fernández, Alfonso
Muñoz, Ariel
González Reyes, Álvaro
Aguilera Betti, Isabella
Toledo, Isadora
Puchi, Paulina
Sauchyn, David
Crespo, Sebastián Andrés
Frene, Cristian
Mundo, Ignacio Alberto
González, Mauro
Vignola, Raffaele
author Fernández, Alfonso
author_facet Fernández, Alfonso
Muñoz, Ariel
González Reyes, Álvaro
Aguilera Betti, Isabella
Toledo, Isadora
Puchi, Paulina
Sauchyn, David
Crespo, Sebastián Andrés
Frene, Cristian
Mundo, Ignacio Alberto
González, Mauro
Vignola, Raffaele
author_role author
author2 Muñoz, Ariel
González Reyes, Álvaro
Aguilera Betti, Isabella
Toledo, Isadora
Puchi, Paulina
Sauchyn, David
Crespo, Sebastián Andrés
Frene, Cristian
Mundo, Ignacio Alberto
González, Mauro
Vignola, Raffaele
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv DENDROHYDROLOGY
WATER RESOURCES MANAGEMENT
SOUTH-CENTRAL CHILE
RÍO IMPERIAL
topic DENDROHYDROLOGY
WATER RESOURCES MANAGEMENT
SOUTH-CENTRAL CHILE
RÍO IMPERIAL
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Streamflow in south-central Chile (SCC, ∼ 37–42∘ S) is vital for agriculture, forestry production, hydroelectricity, and human consumption. Recent drought episodes have generated hydrological deficits with damaging effects on these activities. This region is projected to undergo major reductions in water availability, concomitant with projected increases in water demand. However, the lack of long-term records hampers the development of accurate estimations of natural variability and trends. In order to provide more information on long-term streamflow variability and trends in SCC, here we report findings of an analysis of instrumental records and a tree-ring reconstruction of the summer streamflow of the Río Imperial (∼ 37∘ 40′ S–38∘ 50′ S). This is the first reconstruction in Chile targeted at this season. Results from the instrumental streamflow record (∼ 1940 onwards) indicated that the hydrological regime is fundamentally pluvial with a small snowmelt contribution during spring, and evidenced a decreasing trend, both for the summer and the full annual record. The reconstruction showed that streamflow below the average characterized the post-1980 period, with more frequent, but not more intense, drought episodes. We additionally found that the recent positive phase of the Southern Annular Mode has significantly influenced streamflow. These findings agree with previous studies, suggesting a robust regional signal and a shift to a new hydrological scenario. In this paper, we also discuss implications of these results for water managers and stakeholders; we provide rationale and examples that support the need for the incorporation of tree-ring reconstructions into water resources management.
Fil: Fernández, Alfonso. Universidad de Concepción; Chile
Fil: Muñoz, Ariel. Pontificia Universidad Católica de Valparaíso; Chile
Fil: González Reyes, Álvaro. Universidad Austral de Chile; Chile
Fil: Aguilera Betti, Isabella. Pontificia Universidad Católica de Valparaíso; Chile
Fil: Toledo, Isadora. Pontificia Universidad Católica de Valparaíso; Chile
Fil: Puchi, Paulina. Pontificia Universidad Católica de Valparaíso; Chile
Fil: Sauchyn, David. University of Regina; Canadá
Fil: Crespo, Sebastián Andrés. Pontificia Universidad Católica de Valparaíso; Chile
Fil: Frene, Cristian. Pontificia Universidad Católica de Chile; Chile
Fil: Mundo, Ignacio Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: González, Mauro. Universidad Austral de Chile; Chile
Fil: Vignola, Raffaele. Cátedra Latinoamericana en Decisiones Ambientales para el Cambio Global; Costa Rica
description Streamflow in south-central Chile (SCC, ∼ 37–42∘ S) is vital for agriculture, forestry production, hydroelectricity, and human consumption. Recent drought episodes have generated hydrological deficits with damaging effects on these activities. This region is projected to undergo major reductions in water availability, concomitant with projected increases in water demand. However, the lack of long-term records hampers the development of accurate estimations of natural variability and trends. In order to provide more information on long-term streamflow variability and trends in SCC, here we report findings of an analysis of instrumental records and a tree-ring reconstruction of the summer streamflow of the Río Imperial (∼ 37∘ 40′ S–38∘ 50′ S). This is the first reconstruction in Chile targeted at this season. Results from the instrumental streamflow record (∼ 1940 onwards) indicated that the hydrological regime is fundamentally pluvial with a small snowmelt contribution during spring, and evidenced a decreasing trend, both for the summer and the full annual record. The reconstruction showed that streamflow below the average characterized the post-1980 period, with more frequent, but not more intense, drought episodes. We additionally found that the recent positive phase of the Southern Annular Mode has significantly influenced streamflow. These findings agree with previous studies, suggesting a robust regional signal and a shift to a new hydrological scenario. In this paper, we also discuss implications of these results for water managers and stakeholders; we provide rationale and examples that support the need for the incorporation of tree-ring reconstructions into water resources management.
publishDate 2018
dc.date.none.fl_str_mv 2018-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/88449
Fernández, Alfonso; Muñoz, Ariel; González Reyes, Álvaro; Aguilera Betti, Isabella; Toledo, Isadora; et al.; Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction; Copernicus Publications; Hydrology And Earth System Sciences; 22; 5; 5-2018; 2921-2935
1607-7938
CONICET Digital
CONICET
url http://hdl.handle.net/11336/88449
identifier_str_mv Fernández, Alfonso; Muñoz, Ariel; González Reyes, Álvaro; Aguilera Betti, Isabella; Toledo, Isadora; et al.; Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction; Copernicus Publications; Hydrology And Earth System Sciences; 22; 5; 5-2018; 2921-2935
1607-7938
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.hydrol-earth-syst-sci.net/22/2921/2018/
info:eu-repo/semantics/altIdentifier/doi/10.5194/hess-22-2921-2018
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Copernicus Publications
publisher.none.fl_str_mv Copernicus Publications
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.084731

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