[ Contribution des extractions de sables marins à l’accélération de l’érosion côtière dans la région de San Pedro (Côte d’Ivoire) ]
Volume 41, Issue 3, January 2024, Pages 847–858
Lou Soholy Ange Claverie Lassey1, Bi Youzan Aimé Gbamble2, and Blandine Akissi Egoran3
1 UFR des Sciences De la Mer, Université de San Pedro, 01 BP V 1800, San Pedro, Côte d’Ivoire
2 UFR des Sciences De la Mer, Université de San Pedro, 01 BP V 1800, San Pedro, Côte d’Ivoire
3 UFR des Sciences De la Mer, Université de San Pedro, 01 BP V 1800, San Pedro, Côte d’Ivoire
Original language: French
Copyright © 2024 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The aim of this study, which focuses on beach sediment extraction, is to highlight the impact of these practices on the accelerated erosion of the San Pedro coastline. These practices, linked to the needs of the local population for construction materials, often have catastrophic repercussions. To carry out the work, data on marine sand production was collected, and systematic observation and interview surveys were carried out at the three marine sand quarries in the village of Digboué and at the mouth of San Pedro. This research revealed that both clandestine and official extractions were taking place on a daily basis in these areas. The annual volume of sediment extracted amounts to more than 15,000 m3, not counting clandestine extractions carried out by local villagers, for which the data remain undefined. These activities have disastrous consequences, such as the gradual depletion of sand stocks and a consequent shortage of sediment, which disrupts the equilibrium of the coastal system, causing the coast to retreat and endangering the environment being exploited. Accelerated flooding poses a real threat to the local population. Marine sand extraction causes a great deal of damage and contributes effectively to coastal erosion. It is essential to take defensive measures against this activity.
Author Keywords: Beach, sediment, quarry, coastline, sediment budget.
Volume 41, Issue 3, January 2024, Pages 847–858
Lou Soholy Ange Claverie Lassey1, Bi Youzan Aimé Gbamble2, and Blandine Akissi Egoran3
1 UFR des Sciences De la Mer, Université de San Pedro, 01 BP V 1800, San Pedro, Côte d’Ivoire
2 UFR des Sciences De la Mer, Université de San Pedro, 01 BP V 1800, San Pedro, Côte d’Ivoire
3 UFR des Sciences De la Mer, Université de San Pedro, 01 BP V 1800, San Pedro, Côte d’Ivoire
Original language: French
Copyright © 2024 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
The aim of this study, which focuses on beach sediment extraction, is to highlight the impact of these practices on the accelerated erosion of the San Pedro coastline. These practices, linked to the needs of the local population for construction materials, often have catastrophic repercussions. To carry out the work, data on marine sand production was collected, and systematic observation and interview surveys were carried out at the three marine sand quarries in the village of Digboué and at the mouth of San Pedro. This research revealed that both clandestine and official extractions were taking place on a daily basis in these areas. The annual volume of sediment extracted amounts to more than 15,000 m3, not counting clandestine extractions carried out by local villagers, for which the data remain undefined. These activities have disastrous consequences, such as the gradual depletion of sand stocks and a consequent shortage of sediment, which disrupts the equilibrium of the coastal system, causing the coast to retreat and endangering the environment being exploited. Accelerated flooding poses a real threat to the local population. Marine sand extraction causes a great deal of damage and contributes effectively to coastal erosion. It is essential to take defensive measures against this activity.
Author Keywords: Beach, sediment, quarry, coastline, sediment budget.
Abstract: (french)
Cette étude axée sur les extractions de sédiments de plages a pour objectif de mettre en exergue l’impact de ces pratiques dans l’érosion accélérée du littoral de San Pedro. Ces pratiques liées aux besoins usagers de la population riveraine à une forte demande de matériaux de construction, ont bien souvent des répercussions catastrophiques. Pour mener à bien le travail, des recueils de données relatives aux productions de sables marins ainsi que des enquêtes par observation et interviews systématiques ont été effectués sur les trois carrières de sables marins du village Digboué et celle de l’embouchure de San Pedro. Ces recherches ont permis de découvrir que journalièrement des extractions clandestines comme officielles s’opèrent sur ces zones. Le volume sédimentaire prélevé annuellement s’élève à plus de 15000 m3 sans compter les extractions clandestines dirigées par les villageois riverains dont les données restent indéfinies. Ces activités ont des conséquences désastreuses telles que l’épuisement progressif du stock de sables et donc une pénurie de sédiments ce qui entraîne une rupture de l’équilibre du système côtier, un recul des côtes et le péril du milieu exploité. L’avancée accélérée des eaux constitue une véritable menace pour la population riveraine. Les extractions de sables marins engendrent plusieurs dommages et contribuent efficacement à l’érosion côtière. Il s’avère indispensable que des mesures de défense soient prises contre cette activité.
Author Keywords: Plage, sédiment, carrière, littoral, budget sédimentaire.
How to Cite this Article
Lou Soholy Ange Claverie Lassey, Bi Youzan Aimé Gbamble, and Blandine Akissi Egoran, “Contribution of marine sand extraction to the acceleration of coastal erosion in the San Pedro region (Ivory Coast),” International Journal of Innovation and Applied Studies, vol. 41, no. 3, pp. 847–858, January 2024.
