Dynamics of the Estuarine Turbidity Maximum Zone from Landsat-8 Data: The Case of the Maroni River Estuary, French Guiana
The estuarine turbidity maximum (ETM) zone occurs in river estuaries due to the effects of tidal dynamics, density-driven residual circulation and deposition/erosion of fine sediments. Even though tropical river estuaries contribute proportionally more to the sediment supply of coastal areas, the ET...
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doaj-1ead2ab5d2624c8b9e54efe7e2fc724c2020-11-25T03:04:31ZengMDPI AGRemote Sensing2072-42922020-07-01122173217310.3390/rs12132173Dynamics of the Estuarine Turbidity Maximum Zone from Landsat-8 Data: The Case of the Maroni River Estuary, French GuianaNoelia Abascal-Zorrilla0Vincent Vantrepotte1Nicolas Huybrechts2Dat Dinh Ngoc3Edward J. Anthony4Antoine Gardel5. Centre National de la Recherche Scientifique-CNRS, UG, IFREMER (LEEISA URS 3456), Centre de recherche de Montabo, 97334 Cayenne, French GuianaLaboratoire d’Océanologie et de Géosciences, Université du Littoral-Côte-d’Opale, CNRS, Université de Lille, 32 Avenue Foch, 62930 Wimereux, FranceCerema, HA Research Team, 134 rue de Beauvais, 60280 Margny-lès-Compiègne, FranceSpace Technology Institute, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi Vietnam. Centre National de la Recherche Scientifique-CNRS, UG, IFREMER (LEEISA URS 3456), Centre de recherche de Montabo, 97334 Cayenne, French Guiana. Centre National de la Recherche Scientifique-CNRS, UG, IFREMER (LEEISA URS 3456), Centre de recherche de Montabo, 97334 Cayenne, French GuianaThe estuarine turbidity maximum (ETM) zone occurs in river estuaries due to the effects of tidal dynamics, density-driven residual circulation and deposition/erosion of fine sediments. Even though tropical river estuaries contribute proportionally more to the sediment supply of coastal areas, the ETM in them has been hardly studied. In this study, surface suspended particulate matter (SPM) determined from OLI (Operational Land Imager)-Landsat 8images was used to gain a better understanding of the spatio-temporal dynamics of the ETM of the tropical Maroni estuary (located on the Guianas coast, South America). A method to estimate the remotely-sensed ETM location and its spatiotemporal evolution between 2013 and 2019 was developed. Each ETM was defined from an envelope of normalized SPM values > 0.6 calculated from images of the estuary. The results show the influence of the well-marked seasonal river discharge and of tides, especially during the dry season. The ETM is located in the middle estuary during low river-flow conditions, whereas it shifts towards the mouth during high river flow. Neap–spring tidal cycles result in a push of the ETM closer to the mouth under spring-tide conditions or even outside the mouth during the rainy season. An increase in SPM, especially since 2017, coincident with an extension of the ETM, is shown to reflect the periodic influence of mud banks originating from the mouth of the Amazon and migrating along the coast towards the Orinoco (Venezuela). These results demonstrate the advantages of ocean color data in an exploratory study of the spatio-temporal dynamics of the ETM of a tropical estuary, such as that of the Maroni.https://www.mdpi.com/2072-4292/12/13/2173Estuarine turbidity maximumLandsat-8tropical estuarymud banksFrench Guiana |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Noelia Abascal-Zorrilla Vincent Vantrepotte Nicolas Huybrechts Dat Dinh Ngoc Edward J. Anthony Antoine Gardel |
spellingShingle |
Noelia Abascal-Zorrilla Vincent Vantrepotte Nicolas Huybrechts Dat Dinh Ngoc Edward J. Anthony Antoine Gardel Dynamics of the Estuarine Turbidity Maximum Zone from Landsat-8 Data: The Case of the Maroni River Estuary, French Guiana Remote Sensing Estuarine turbidity maximum Landsat-8 tropical estuary mud banks French Guiana |
author_facet |
Noelia Abascal-Zorrilla Vincent Vantrepotte Nicolas Huybrechts Dat Dinh Ngoc Edward J. Anthony Antoine Gardel |
author_sort |
Noelia Abascal-Zorrilla |
title |
Dynamics of the Estuarine Turbidity Maximum Zone from Landsat-8 Data: The Case of the Maroni River Estuary, French Guiana |
title_short |
Dynamics of the Estuarine Turbidity Maximum Zone from Landsat-8 Data: The Case of the Maroni River Estuary, French Guiana |
title_full |
Dynamics of the Estuarine Turbidity Maximum Zone from Landsat-8 Data: The Case of the Maroni River Estuary, French Guiana |
title_fullStr |
Dynamics of the Estuarine Turbidity Maximum Zone from Landsat-8 Data: The Case of the Maroni River Estuary, French Guiana |
title_full_unstemmed |
Dynamics of the Estuarine Turbidity Maximum Zone from Landsat-8 Data: The Case of the Maroni River Estuary, French Guiana |
title_sort |
dynamics of the estuarine turbidity maximum zone from landsat-8 data: the case of the maroni river estuary, french guiana |
publisher |
MDPI AG |
series |
Remote Sensing |
issn |
2072-4292 |
publishDate |
2020-07-01 |
description |
The estuarine turbidity maximum (ETM) zone occurs in river estuaries due to the effects of tidal dynamics, density-driven residual circulation and deposition/erosion of fine sediments. Even though tropical river estuaries contribute proportionally more to the sediment supply of coastal areas, the ETM in them has been hardly studied. In this study, surface suspended particulate matter (SPM) determined from OLI (Operational Land Imager)-Landsat 8images was used to gain a better understanding of the spatio-temporal dynamics of the ETM of the tropical Maroni estuary (located on the Guianas coast, South America). A method to estimate the remotely-sensed ETM location and its spatiotemporal evolution between 2013 and 2019 was developed. Each ETM was defined from an envelope of normalized SPM values > 0.6 calculated from images of the estuary. The results show the influence of the well-marked seasonal river discharge and of tides, especially during the dry season. The ETM is located in the middle estuary during low river-flow conditions, whereas it shifts towards the mouth during high river flow. Neap–spring tidal cycles result in a push of the ETM closer to the mouth under spring-tide conditions or even outside the mouth during the rainy season. An increase in SPM, especially since 2017, coincident with an extension of the ETM, is shown to reflect the periodic influence of mud banks originating from the mouth of the Amazon and migrating along the coast towards the Orinoco (Venezuela). These results demonstrate the advantages of ocean color data in an exploratory study of the spatio-temporal dynamics of the ETM of a tropical estuary, such as that of the Maroni. |
topic |
Estuarine turbidity maximum Landsat-8 tropical estuary mud banks French Guiana |
url |
https://www.mdpi.com/2072-4292/12/13/2173 |
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