Cargando…
Palaeo-tsunami inundation distances deduced from roundness of gravel particles in tsunami deposits
Information on palaeo-tsunami magnitude is scientifically and socially essential to mitigate tsunami risk. However, estimating palaeo-tsunami parameters (e.g., inundation distance) from sediments is not simple because tsunami deposits reflect complex transport processes. Here, we show a new approach...
Autores principales: | , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6635351/ https://www.ncbi.nlm.nih.gov/pubmed/31312008 http://dx.doi.org/10.1038/s41598-019-46584-z |
_version_ | 1783435865662423040 |
---|---|
author | Ishimura, Daisuke Yamada, Keitaro |
author_facet | Ishimura, Daisuke Yamada, Keitaro |
author_sort | Ishimura, Daisuke |
collection | PubMed |
description | Information on palaeo-tsunami magnitude is scientifically and socially essential to mitigate tsunami risk. However, estimating palaeo-tsunami parameters (e.g., inundation distance) from sediments is not simple because tsunami deposits reflect complex transport processes. Here, we show a new approach to estimate tsunami inundation distance based on the mixture ratio of gravels from several sources in tsunami deposits. We measured the roundness of source gravels in modern beach and fluvial deposits in a coastal valley in Japan through image analysis and then calculated the mixture ratio of both sediment types in tsunami deposits. Normalising the mixture ratios by inundation distances revealed an abrupt change in the mixture ratio at a constant percentile, regardless of tsunami magnitude. This relation allowed estimation of the inundation distance of palaeo-tsunamis during the last 4000 years. |
format | Online Article Text |
id | pubmed-6635351 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-66353512019-07-23 Palaeo-tsunami inundation distances deduced from roundness of gravel particles in tsunami deposits Ishimura, Daisuke Yamada, Keitaro Sci Rep Article Information on palaeo-tsunami magnitude is scientifically and socially essential to mitigate tsunami risk. However, estimating palaeo-tsunami parameters (e.g., inundation distance) from sediments is not simple because tsunami deposits reflect complex transport processes. Here, we show a new approach to estimate tsunami inundation distance based on the mixture ratio of gravels from several sources in tsunami deposits. We measured the roundness of source gravels in modern beach and fluvial deposits in a coastal valley in Japan through image analysis and then calculated the mixture ratio of both sediment types in tsunami deposits. Normalising the mixture ratios by inundation distances revealed an abrupt change in the mixture ratio at a constant percentile, regardless of tsunami magnitude. This relation allowed estimation of the inundation distance of palaeo-tsunamis during the last 4000 years. Nature Publishing Group UK 2019-07-16 /pmc/articles/PMC6635351/ /pubmed/31312008 http://dx.doi.org/10.1038/s41598-019-46584-z Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Ishimura, Daisuke Yamada, Keitaro Palaeo-tsunami inundation distances deduced from roundness of gravel particles in tsunami deposits |
title | Palaeo-tsunami inundation distances deduced from roundness of gravel particles in tsunami deposits |
title_full | Palaeo-tsunami inundation distances deduced from roundness of gravel particles in tsunami deposits |
title_fullStr | Palaeo-tsunami inundation distances deduced from roundness of gravel particles in tsunami deposits |
title_full_unstemmed | Palaeo-tsunami inundation distances deduced from roundness of gravel particles in tsunami deposits |
title_short | Palaeo-tsunami inundation distances deduced from roundness of gravel particles in tsunami deposits |
title_sort | palaeo-tsunami inundation distances deduced from roundness of gravel particles in tsunami deposits |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6635351/ https://www.ncbi.nlm.nih.gov/pubmed/31312008 http://dx.doi.org/10.1038/s41598-019-46584-z |
work_keys_str_mv | AT ishimuradaisuke palaeotsunamiinundationdistancesdeducedfromroundnessofgravelparticlesintsunamideposits AT yamadakeitaro palaeotsunamiinundationdistancesdeducedfromroundnessofgravelparticlesintsunamideposits |