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Morphological Forecast of the Grand-Bassam Shoreline by the Kalman Filter Model (Ivory Coast)

This study presents a high spatial resolution morphodynamic numerical simulation of the Grand-Bassam shoreline, located est of Abidjan. Indeed, for several years, this area has been confronted with receding coastlines causing significant material damage and flooding, which has made it possible to consider investigations in this area. However, these investigations have not always made it possible to accurately predict the morphological dynamics of the future shoreline of this area. This explains the use of MultiSpectral Instrument (MSI) 2A sentinel images from 2015 to 2020 (spatial resolution is 10m) to extract the shorelines. Digital processing was performed using the Digital Shoreline Analysis System (DSAS), compatible with ArcGis 10.5 software. The End Point Rate (EPR) and Linear Regression Rate (LRR) methods were used to calculate the statistical evolution of the Grand-Bassam shorelines between 2015 and 2020. To improve the forecast, including updating the rate and uncertainties, the Kalman filter approach is initialized with the linear regression rate calculated by DSAS. The treatments allowed to generate 9758 transects (4853 transects west of the mouth, 2550 east of the mouth and 2355 transects after Asséoufoué) for 2 m steps. During the period indicated, the Grand-Bassam shoreline has receded by -0.47 m /year. The west areas of the mouth and after Asséoufoué show negative balances with erosion rates of -0.97 m per and -0.22 m/year respectively. On the other hand, the eastern sector of the mouth presents a positive balance with a rate of 0.24 m/year. The simulations made on the evolution of the future dynamics of the coastline show a fattening of 21.49 m or 2.15 m/year in 2030 and a fattening of 30.4 m or 1.53 m/year in 2040.

Sentinel Image, Shoreline, DSAS, Kalman Filter, Forecast, Grand-Bassam

APA Style

Jacques André Tiemele, Mamadou Soumahoro, Jean-Baptiste Kassi. (2022). Morphological Forecast of the Grand-Bassam Shoreline by the Kalman Filter Model (Ivory Coast). International Journal of Atmospheric and Oceanic Sciences, 6(2), 35-43. https://doi.org/10.11648/j.ijaos.20220602.11

ACS Style

Jacques André Tiemele; Mamadou Soumahoro; Jean-Baptiste Kassi. Morphological Forecast of the Grand-Bassam Shoreline by the Kalman Filter Model (Ivory Coast). Int. J. Atmos. Oceanic Sci. 2022, 6(2), 35-43. doi: 10.11648/j.ijaos.20220602.11

AMA Style

Jacques André Tiemele, Mamadou Soumahoro, Jean-Baptiste Kassi. Morphological Forecast of the Grand-Bassam Shoreline by the Kalman Filter Model (Ivory Coast). Int J Atmos Oceanic Sci. 2022;6(2):35-43. doi: 10.11648/j.ijaos.20220602.11

Copyright © 2022 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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