Morphodynamics and Evolution of Estuarine Sandspits along the Bight of Benin Coast, West Africa

It is well known that estuarine systems are significantly affected by hydrodynamic conditions such as river discharge, storm surges, waves and tidal conditions. In addition to this, human interferences through developmental projects have the capability of disrupting the natural morphological process...

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Autores principales:	Stephan Korblah Lawson, Hitoshi Tanaka, Keiko Udo, Nguyen Trong Hiep, Nguyen Xuan Tinh
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	estuarine systems river mouth tidal inlet longshore sediment transport morphodynamics satellite image analysis Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/5b7c9f4391004aaba4c867d3ffa23660
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spelling	oai:doaj.org-article:5b7c9f4391004aaba4c867d3ffa236602021-11-11T19:53:16ZMorphodynamics and Evolution of Estuarine Sandspits along the Bight of Benin Coast, West Africa10.3390/w132129772073-4441https://doaj.org/article/5b7c9f4391004aaba4c867d3ffa236602021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/21/2977https://doaj.org/toc/2073-4441It is well known that estuarine systems are significantly affected by hydrodynamic conditions such as river discharge, storm surges, waves and tidal conditions. In addition to this, human interferences through developmental projects have the capability of disrupting the natural morphological processes occurring at estuaries. In West Africa, the goal to improve standards of living through large-scale dam construction, offshore ports and coastal erosion countermeasures has triggered alarming changes in the morphodynamics of estuarine systems. The estuaries at the Volta River mouth (Ghana) and “Bouche du Roi” inlet (Benin), located along the Bight of Benin coast, West Africa, were selected as two case study sites to examine their long-term morphodynamics and sandspit evolution. In this study, we primarily analyzed estuarine morphology using remotely sensed images acquired from 1984 to 2020. We further estimated the longshore sediment transport for this region using results from the image analysis and the depth of active sediment motion. Our results reveal that the longshore sediment transport rates for this region are in the magnitude of 10<sup>5</sup>–10<sup>6</sup> m<sup>3</sup>/year. Comparative analysis with other estuaries and sandy coasts suggests that the longshore sediment transport along this coast has one of the largest rates estimated in the world.Stephan Korblah LawsonHitoshi TanakaKeiko UdoNguyen Trong HiepNguyen Xuan TinhMDPI AGarticleestuarine systemsriver mouthtidal inletlongshore sediment transportmorphodynamicssatellite image analysisHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 2977, p 2977 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	estuarine systems river mouth tidal inlet longshore sediment transport morphodynamics satellite image analysis Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	estuarine systems river mouth tidal inlet longshore sediment transport morphodynamics satellite image analysis Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Stephan Korblah Lawson Hitoshi Tanaka Keiko Udo Nguyen Trong Hiep Nguyen Xuan Tinh Morphodynamics and Evolution of Estuarine Sandspits along the Bight of Benin Coast, West Africa
description	It is well known that estuarine systems are significantly affected by hydrodynamic conditions such as river discharge, storm surges, waves and tidal conditions. In addition to this, human interferences through developmental projects have the capability of disrupting the natural morphological processes occurring at estuaries. In West Africa, the goal to improve standards of living through large-scale dam construction, offshore ports and coastal erosion countermeasures has triggered alarming changes in the morphodynamics of estuarine systems. The estuaries at the Volta River mouth (Ghana) and “Bouche du Roi” inlet (Benin), located along the Bight of Benin coast, West Africa, were selected as two case study sites to examine their long-term morphodynamics and sandspit evolution. In this study, we primarily analyzed estuarine morphology using remotely sensed images acquired from 1984 to 2020. We further estimated the longshore sediment transport for this region using results from the image analysis and the depth of active sediment motion. Our results reveal that the longshore sediment transport rates for this region are in the magnitude of 10<sup>5</sup>–10<sup>6</sup> m<sup>3</sup>/year. Comparative analysis with other estuaries and sandy coasts suggests that the longshore sediment transport along this coast has one of the largest rates estimated in the world.
format	article
author	Stephan Korblah Lawson Hitoshi Tanaka Keiko Udo Nguyen Trong Hiep Nguyen Xuan Tinh
author_facet	Stephan Korblah Lawson Hitoshi Tanaka Keiko Udo Nguyen Trong Hiep Nguyen Xuan Tinh
author_sort	Stephan Korblah Lawson
title	Morphodynamics and Evolution of Estuarine Sandspits along the Bight of Benin Coast, West Africa
title_short	Morphodynamics and Evolution of Estuarine Sandspits along the Bight of Benin Coast, West Africa
title_full	Morphodynamics and Evolution of Estuarine Sandspits along the Bight of Benin Coast, West Africa
title_fullStr	Morphodynamics and Evolution of Estuarine Sandspits along the Bight of Benin Coast, West Africa
title_full_unstemmed	Morphodynamics and Evolution of Estuarine Sandspits along the Bight of Benin Coast, West Africa
title_sort	morphodynamics and evolution of estuarine sandspits along the bight of benin coast, west africa
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5b7c9f4391004aaba4c867d3ffa23660
work_keys_str_mv	AT stephankorblahlawson morphodynamicsandevolutionofestuarinesandspitsalongthebightofbenincoastwestafrica AT hitoshitanaka morphodynamicsandevolutionofestuarinesandspitsalongthebightofbenincoastwestafrica AT keikoudo morphodynamicsandevolutionofestuarinesandspitsalongthebightofbenincoastwestafrica AT nguyentronghiep morphodynamicsandevolutionofestuarinesandspitsalongthebightofbenincoastwestafrica AT nguyenxuantinh morphodynamicsandevolutionofestuarinesandspitsalongthebightofbenincoastwestafrica
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Morphodynamics and Evolution of Estuarine Sandspits along the Bight of Benin Coast, West Africa

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