Impacts des structures rigides de protection sur la côte néo-brunswickoise de la baie des Chaleurs au Canada
Hard coastal defences (HCD) have multiplied in the last few decades on the Chaleur Regional Service Commission area, a situation that requires the assessment of their effects on coastal processes and features. In this study, photogrammetric techniques were used to make an accurate appraisal of impac...
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| Format: | Article |
| Language: | fra |
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Éditions en environnement VertigO
2021-10-01
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| Series: | VertigO |
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| Online Access: | https://journals.openedition.org/vertigo/32393 |
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| author | Simon Diouf Dominique Bérubé André Robichaud |
| author_facet | Simon Diouf Dominique Bérubé André Robichaud |
| author_sort | Simon Diouf |
| collection | DOAJ |
| description | Hard coastal defences (HCD) have multiplied in the last few decades on the Chaleur Regional Service Commission area, a situation that requires the assessment of their effects on coastal processes and features. In this study, photogrammetric techniques were used to make an accurate appraisal of impacts. Firstly, historical coastline change was measured for two periods: 1934-1985 and 1985-2012/2018. Secondly, beach surface occupied by HCD was quantified. Finally, topographic surveys on beach morphology were carried out. Results show that HCD represent 54 % of the study area coastline. The hardened sections of the coastline become fixed, while adjacent natural sections globally an accelerated retreat. HCD cover 23 % of beaches in Nigadoo, 12 % in Beresford, 37 % in Salmon Beach west and 27 % in Salmon Beach Est. Finally, it was found that the hardened beaches are on average two to four times less wide than natural beaches and present the lowest foreshore elevations. |
| format | Article |
| id | doaj-art-069faca156944ac69eda84a026d56c5b |
| institution | Kabale University |
| issn | 1492-8442 |
| language | fra |
| publishDate | 2021-10-01 |
| publisher | Éditions en environnement VertigO |
| record_format | Article |
| series | VertigO |
| spelling | doaj-art-069faca156944ac69eda84a026d56c5b2025-01-09T12:35:31ZfraÉditions en environnement VertigOVertigO1492-84422021-10-0121210.4000/vertigo.32393Impacts des structures rigides de protection sur la côte néo-brunswickoise de la baie des Chaleurs au CanadaSimon DioufDominique BérubéAndré RobichaudHard coastal defences (HCD) have multiplied in the last few decades on the Chaleur Regional Service Commission area, a situation that requires the assessment of their effects on coastal processes and features. In this study, photogrammetric techniques were used to make an accurate appraisal of impacts. Firstly, historical coastline change was measured for two periods: 1934-1985 and 1985-2012/2018. Secondly, beach surface occupied by HCD was quantified. Finally, topographic surveys on beach morphology were carried out. Results show that HCD represent 54 % of the study area coastline. The hardened sections of the coastline become fixed, while adjacent natural sections globally an accelerated retreat. HCD cover 23 % of beaches in Nigadoo, 12 % in Beresford, 37 % in Salmon Beach west and 27 % in Salmon Beach Est. Finally, it was found that the hardened beaches are on average two to four times less wide than natural beaches and present the lowest foreshore elevations.https://journals.openedition.org/vertigo/32393photogrammetrycoastline hardeningrigid protective structuresNouveau-Brunswick. |
| spellingShingle | Simon Diouf Dominique Bérubé André Robichaud Impacts des structures rigides de protection sur la côte néo-brunswickoise de la baie des Chaleurs au Canada VertigO photogrammetry coastline hardening rigid protective structures Nouveau-Brunswick. |
| title | Impacts des structures rigides de protection sur la côte néo-brunswickoise de la baie des Chaleurs au Canada |
| title_full | Impacts des structures rigides de protection sur la côte néo-brunswickoise de la baie des Chaleurs au Canada |
| title_fullStr | Impacts des structures rigides de protection sur la côte néo-brunswickoise de la baie des Chaleurs au Canada |
| title_full_unstemmed | Impacts des structures rigides de protection sur la côte néo-brunswickoise de la baie des Chaleurs au Canada |
| title_short | Impacts des structures rigides de protection sur la côte néo-brunswickoise de la baie des Chaleurs au Canada |
| title_sort | impacts des structures rigides de protection sur la cote neo brunswickoise de la baie des chaleurs au canada |
| topic | photogrammetry coastline hardening rigid protective structures Nouveau-Brunswick. |
| url | https://journals.openedition.org/vertigo/32393 |
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