Tsunami hazard assessment in the southern Colombian Pacific basin and a proposal to regenerate a previous barrier island as protection
In this study, the tsunami hazard posed to 120 000 inhabitants of Tumaco (Colombia) is assessed, and an evaluation and analysis of regenerating the previous El Guano Island for tsunami protection is conducted. El Guano Island was a sandy barrier island in front of the city of Tumaco until its disapp...
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ftcopernicus:oai:publications.copernicus.org:nhess19651 2023-05-15T16:32:14+02:00 Tsunami hazard assessment in the southern Colombian Pacific basin and a proposal to regenerate a previous barrier island as protection Otero, L. J. Restrepo, J. C. Gonzalez, M. 2018-09-27 application/pdf https://doi.org/10.5194/nhess-14-1155-2014 https://nhess.copernicus.org/articles/14/1155/2014/ eng eng doi:10.5194/nhess-14-1155-2014 https://nhess.copernicus.org/articles/14/1155/2014/ eISSN: 1684-9981 Text 2018 ftcopernicus https://doi.org/10.5194/nhess-14-1155-2014 2020-07-20T16:25:05Z In this study, the tsunami hazard posed to 120 000 inhabitants of Tumaco (Colombia) is assessed, and an evaluation and analysis of regenerating the previous El Guano Island for tsunami protection is conducted. El Guano Island was a sandy barrier island in front of the city of Tumaco until its disappearance during the tsunami of 1979; the island is believed to have played a protective role, substantially reducing the scale of the disaster. The analysis is conducted by identifying seismotectonic parameters and focal mechanisms of tsunami generation in the area, determining seven potential generation sources, applying a numerical model for tsunami generation and propagation, and evaluating the effect of tsunamis on Tumaco. The results show that in the current situation, this area is vulnerable to impact and flooding by tsunamis originating nearby. El Guano Island was found to markedly reduce flood levels and the energy flux of tsunami waves in Tumaco during the 1979 tsunami. By reducing the risk of flooding due to tsunamis, the regeneration and morphological modification of El Guano Island would help to protect Tumaco. Text Guano Island Copernicus Publications: E-Journals Barrier Island ENVELOPE(78.396,78.396,-68.431,-68.431) Guano ENVELOPE(141.604,141.604,-66.775,-66.775) Guano Island ENVELOPE(141.604,141.604,-66.775,-66.775) Pacific Natural Hazards and Earth System Sciences 14 5 1155 1168 |
institution |
Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
In this study, the tsunami hazard posed to 120 000 inhabitants of Tumaco (Colombia) is assessed, and an evaluation and analysis of regenerating the previous El Guano Island for tsunami protection is conducted. El Guano Island was a sandy barrier island in front of the city of Tumaco until its disappearance during the tsunami of 1979; the island is believed to have played a protective role, substantially reducing the scale of the disaster. The analysis is conducted by identifying seismotectonic parameters and focal mechanisms of tsunami generation in the area, determining seven potential generation sources, applying a numerical model for tsunami generation and propagation, and evaluating the effect of tsunamis on Tumaco. The results show that in the current situation, this area is vulnerable to impact and flooding by tsunamis originating nearby. El Guano Island was found to markedly reduce flood levels and the energy flux of tsunami waves in Tumaco during the 1979 tsunami. By reducing the risk of flooding due to tsunamis, the regeneration and morphological modification of El Guano Island would help to protect Tumaco. |
format |
Text |
author |
Otero, L. J. Restrepo, J. C. Gonzalez, M. |
spellingShingle |
Otero, L. J. Restrepo, J. C. Gonzalez, M. Tsunami hazard assessment in the southern Colombian Pacific basin and a proposal to regenerate a previous barrier island as protection |
author_facet |
Otero, L. J. Restrepo, J. C. Gonzalez, M. |
author_sort |
Otero, L. J. |
title |
Tsunami hazard assessment in the southern Colombian Pacific basin and a proposal to regenerate a previous barrier island as protection |
title_short |
Tsunami hazard assessment in the southern Colombian Pacific basin and a proposal to regenerate a previous barrier island as protection |
title_full |
Tsunami hazard assessment in the southern Colombian Pacific basin and a proposal to regenerate a previous barrier island as protection |
title_fullStr |
Tsunami hazard assessment in the southern Colombian Pacific basin and a proposal to regenerate a previous barrier island as protection |
title_full_unstemmed |
Tsunami hazard assessment in the southern Colombian Pacific basin and a proposal to regenerate a previous barrier island as protection |
title_sort |
tsunami hazard assessment in the southern colombian pacific basin and a proposal to regenerate a previous barrier island as protection |
publishDate |
2018 |
url |
https://doi.org/10.5194/nhess-14-1155-2014 https://nhess.copernicus.org/articles/14/1155/2014/ |
long_lat |
ENVELOPE(78.396,78.396,-68.431,-68.431) ENVELOPE(141.604,141.604,-66.775,-66.775) ENVELOPE(141.604,141.604,-66.775,-66.775) |
geographic |
Barrier Island Guano Guano Island Pacific |
geographic_facet |
Barrier Island Guano Guano Island Pacific |
genre |
Guano Island |
genre_facet |
Guano Island |
op_source |
eISSN: 1684-9981 |
op_relation |
doi:10.5194/nhess-14-1155-2014 https://nhess.copernicus.org/articles/14/1155/2014/ |
op_doi |
https://doi.org/10.5194/nhess-14-1155-2014 |
container_title |
Natural Hazards and Earth System Sciences |
container_volume |
14 |
container_issue |
5 |
container_start_page |
1155 |
op_container_end_page |
1168 |
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1766021978313981952 |