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| Mengual, Baptiste; Le Hir, Pierre; Cayocca, Florence; Garlan, T.. |
| Based on experiments, a trawling-induced erosion dynamics was included in a 3D realistic and pre-validated hydro-sedimentary model so as to assess its contribution to the overall regional sediment dynamics in the specific case of the Bay of Biscay continental shelf. The effect of trawling was investigated throughout a 5-year period in terms of horizontal/vertical fluxes and changes in seabed mud content, and compared to the natural variability of sediment fluxes at different spatio-temporal scales. Trawling is shown in the model to significantly contribute to sediment re-suspension, and changes in the seabed at the scale of the shelf. The contribution of trawling to re-suspension is >80% during the high fishing season at many locations on the outer... |
| Tipo: Text |
Palavras-chave: Sediment fluxes; Bottom trawling; Numerical modelling; Bay of Biscay; Continental shelf. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00500/61146/64574.pdf |
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| Bourget, J.; Zaragosi, S.; Garlan, T.; Gabelotaud, I.; Guyomard, P.; Dennielou, Bernard; Ellouz-zimmermann, N.; Schneider, J. L.. |
| During the Fanindien 2006 cruise of R/V 'Beautemps-Beaupre', high resolution multibeam bathymetry, sub-bottom profiling and sediment coring was carried out along the East African margin, offshore Tanzania and Mozambique (Indian Ocean). The newly acquired data reveal the presence of a giant deep-sea valley (the Tanzania channel) that is more than 10 km wide at 4000 m water depth, along the continental rise. The valley remains similar to 70 m deep and 7 km wide at 800 km from the Tanzania coast. Morphological comparison with worldwide submarine channels show that the Tanzania channel is one of the largest known submarine valleys. This discovery brings new light on development of submarine valleys that drain sediments originated from the East African Rift... |
| Tipo: Text |
Palavras-chave: Indian Ocean; East African margin; East African Rift System; Turbidite system; Submarine channel. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-6855.pdf |
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| Bourget, J.; Zaragosi, S.; Garlan, T.; Gabelotaud, I.; Guyomard, P.; Dennielou, Bernard; Ellouz-zimmermann, N.; Schneider, J. L.. |
| During the Fanindien 2006 cruise of R/V 'Beautemps-Beaupre', high resolution multibeam bathymetry, sub-bottom profiling and sediment coring was carried out along the East African margin, offshore Tanzania and Mozambique (Indian Ocean). The newly acquired data reveal the presence of a giant deep-sea valley (the Tanzania channel) that is more than 10 km wide at 4000 m water depth, along the continental rise. The valley remains similar to 70 m deep and 7 km wide at 800 km from the Tanzania coast. Morphological comparison with worldwide submarine channels show that the Tanzania channel is one of the largest known submarine valleys. This discovery brings new light on development of submarine valleys that drain sediments originated from the East African Rift... |
| Tipo: Text |
Palavras-chave: Indian Ocean; East African margin; East African Rift System; Turbidite system; Submarine channel. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/00324/43491/42958.pdf |
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