Late Holocene canyon-carving floods in northern Iceland were smaller than previously reported
Catastrophic floods have formed deep bedrock canyons on Earth, but the relationship between peak discharge and bedrock erosion is not clearly understood. This hinders efforts to use geological evidence of these cataclysmic events to constrain their magnitude – a prerequisite for impact assessments....
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ftmanchuniv:oai:e-space.mmu.ac.uk:627753 2024-05-19T07:42:36+00:00 Late Holocene canyon-carving floods in northern Iceland were smaller than previously reported van der Bilt, Willem Barr, Iestyn Berben, Sarah Hennekam, Rick Lane, Timothy Adamson, Kathryn Bakke, Jostein 2021-05-11 text https://e-space.mmu.ac.uk/627753/11/s43247-021-00152-4.pdf en eng Springer Nature https://e-space.mmu.ac.uk/627753/ https://www.nature.com/articles/s43247-021-00152-4 10.1038/s43247-021-00152-4 https://e-space.mmu.ac.uk/627753/11/s43247-021-00152-4.pdf van der Bilt, Willem </view/creators/van_der_Bilt=3AWillem=3A=3A.html>, Barr, Iestyn </view/creators/Barr=3AIestyn=3A=3A.html> ORCID logoorcid:0000-0002-9066-8738 , Berben, Sarah </view/creators/Berben=3ASarah=3A=3A.html>, Hennekam, Rick </view/creators/Hennekam=3ARick=3A=3A.html>, Lane, Timothy </view/creators/Lane=3ATimothy=3A=3A.html>, Adamson, Kathryn </view/creators/Adamson=3AKathryn=3A=3A.html> ORCID logoorcid:0000-0002-6272-1458 and Bakke, Jostein </view/creators/Bakke=3AJostein=3A=3A.html> (2021) Late Holocene canyon-carving floods in northern Iceland were smaller than previously reported. Communications Earth & Environment, 2 (1). p. 86. ISSN 2662-4435 cc_by_4 info:eu-repo/semantics/openAccess Article PeerReviewed 2021 ftmanchuniv 2024-04-30T23:59:52Z Catastrophic floods have formed deep bedrock canyons on Earth, but the relationship between peak discharge and bedrock erosion is not clearly understood. This hinders efforts to use geological evidence of these cataclysmic events to constrain their magnitude – a prerequisite for impact assessments. Here, we combine proxy evidence from slackwater sediments with topographic models and hydraulic simulations to constrain the Late Holocene flood history of the Jökulsá á Fjöllum river in northern Iceland. We date floods to 3.5, 1.5 and 1.35 thousand years ago and confirm that flow peaks during these events were at most a third of previous estimates. Nevertheless, exposure ages suggests that nearby knickpoints retreated by more than 2 km during these floods. These findings support a growing consensus that the extent of bedrock erosion is not necessarily controlled by discharge and that canyon-carving floods may be smaller than typically assumed. Article in Journal/Newspaper Iceland eSpace - Manchester Metropolitan University's Research Repository |
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Open Polar |
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eSpace - Manchester Metropolitan University's Research Repository |
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ftmanchuniv |
language |
English |
description |
Catastrophic floods have formed deep bedrock canyons on Earth, but the relationship between peak discharge and bedrock erosion is not clearly understood. This hinders efforts to use geological evidence of these cataclysmic events to constrain their magnitude – a prerequisite for impact assessments. Here, we combine proxy evidence from slackwater sediments with topographic models and hydraulic simulations to constrain the Late Holocene flood history of the Jökulsá á Fjöllum river in northern Iceland. We date floods to 3.5, 1.5 and 1.35 thousand years ago and confirm that flow peaks during these events were at most a third of previous estimates. Nevertheless, exposure ages suggests that nearby knickpoints retreated by more than 2 km during these floods. These findings support a growing consensus that the extent of bedrock erosion is not necessarily controlled by discharge and that canyon-carving floods may be smaller than typically assumed. |
format |
Article in Journal/Newspaper |
author |
van der Bilt, Willem Barr, Iestyn Berben, Sarah Hennekam, Rick Lane, Timothy Adamson, Kathryn Bakke, Jostein |
spellingShingle |
van der Bilt, Willem Barr, Iestyn Berben, Sarah Hennekam, Rick Lane, Timothy Adamson, Kathryn Bakke, Jostein Late Holocene canyon-carving floods in northern Iceland were smaller than previously reported |
author_facet |
van der Bilt, Willem Barr, Iestyn Berben, Sarah Hennekam, Rick Lane, Timothy Adamson, Kathryn Bakke, Jostein |
author_sort |
van der Bilt, Willem |
title |
Late Holocene canyon-carving floods in northern Iceland were smaller than previously reported |
title_short |
Late Holocene canyon-carving floods in northern Iceland were smaller than previously reported |
title_full |
Late Holocene canyon-carving floods in northern Iceland were smaller than previously reported |
title_fullStr |
Late Holocene canyon-carving floods in northern Iceland were smaller than previously reported |
title_full_unstemmed |
Late Holocene canyon-carving floods in northern Iceland were smaller than previously reported |
title_sort |
late holocene canyon-carving floods in northern iceland were smaller than previously reported |
publisher |
Springer Nature |
publishDate |
2021 |
url |
https://e-space.mmu.ac.uk/627753/11/s43247-021-00152-4.pdf |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
https://e-space.mmu.ac.uk/627753/ https://www.nature.com/articles/s43247-021-00152-4 10.1038/s43247-021-00152-4 https://e-space.mmu.ac.uk/627753/11/s43247-021-00152-4.pdf van der Bilt, Willem </view/creators/van_der_Bilt=3AWillem=3A=3A.html>, Barr, Iestyn </view/creators/Barr=3AIestyn=3A=3A.html> ORCID logoorcid:0000-0002-9066-8738 , Berben, Sarah </view/creators/Berben=3ASarah=3A=3A.html>, Hennekam, Rick </view/creators/Hennekam=3ARick=3A=3A.html>, Lane, Timothy </view/creators/Lane=3ATimothy=3A=3A.html>, Adamson, Kathryn </view/creators/Adamson=3AKathryn=3A=3A.html> ORCID logoorcid:0000-0002-6272-1458 and Bakke, Jostein </view/creators/Bakke=3AJostein=3A=3A.html> (2021) Late Holocene canyon-carving floods in northern Iceland were smaller than previously reported. Communications Earth & Environment, 2 (1). p. 86. ISSN 2662-4435 |
op_rights |
cc_by_4 info:eu-repo/semantics/openAccess |
_version_ |
1799482289711742976 |