Granulometric Indices Mapping in Relation to Hydrodynamic Factors for Beach Characterization and Monitoring with Very High Spatial Resolution
Main Article Content
The objective of this article is the spatiotemporal monitoring of coastline and beaches in relation to hydrodynamics and sediment dynamics. Since the study area is local, it is important to carry out a very high spatial resolution study. To achieve our goal we used satellite images with a spatial resolution of 0.2 m on the one hand and the high-resolution SWAN model on the other hand. We have transformed satellite images into coastlines. For the diachronic study we used ArcGIS to create a mosaic of images, to rectify these mosaics and to calculate the distances separating the coastlines taken on different dates. We observed the presence of erosion/accretion on several beaches. This evolution can be explained by the effect of the maritime structures and the contributions of the wadis. Wave energies are distributed unevenly along the coast due to the bathymetry of the area and the orientation of the coastline. The study of the sedimentary dynamics based on the granulometric study of the surface sediments and the extrapolation of the different granulometric indices under ArcGIS allowed us to show the distribution of different sedimentary facies on the surfaces of the studied beaches. We noticed a concordance between the distribution of wave energies and the evolution of the coastline. On the other hand, the combination of the results obtained and the granulometric analysis allowed us to explain the distribution of sedimentary classes.
 D. B. Scott, “Coastal changes, rapid. In: Schwartz, M.L. (Ed.), Encyclopedia of Coastal Sciences.,” Springer, The Netherlands, p. 253e255, 2005.
 M. E. U. R. É. C, D. P. Eboudt, H. H. Eurtefeux, F. F. Lanquart, M. V Orel, and R. S. Oussel, “Vers une stratégie de gestion à long terme de l ’ érosion côtière : l ’ apport de l ’ évaluation de la vulnérabilité,” pp. 1–5, 2006.
 J.-C. Dionne, “Paskoff, Roland (1994) Les littoraux. Impact des aménagements sur leur évolution. Paris, Masson, 2e édition, 256 p. (ISBN 2-225-84324-4),” Cah. Geogr. Que., vol. 39, no. 106, p. 129, 2012.
 K. Remmache, N. E. I. Bachari, and F. Houma, “Very high resolution remote sensing for the diachronic study of beaches in the central Algerian region,” in Proceedings Book ICONDATA International Conference on Data Science and Application 3-6 October Edrimit Balikesir Turquie., 2019, pp. 205–214.
 E. R. Thieler, E. A. Himmelstoss, J. L. Zichichi, and A. Ergul, “The Digital Shoreline Analysis System (DSAS) Version 4.0 - An ArcGIS extension for calculating shoreline change,” Open-File Rep., 2009.
 F. Ramade, Dictionnaire encyclopédique des sciences de l’eau., Paris : Ed. Science, 1998.
 B. Corinne, “Développement de bioessais sur sédiments et applications à l ’ étude , en laboratoire , de la toxicité de sédiments dulçaquicoles contaminés Remerciements,” 2000.
 A. Rivière, Méthodes granulo-métriques, techniques et interprétation, Paris,. Masson, 1977.
 S. J. Blott and K. Pye, “Preface,” Dev. Water Sci., vol. 26, no. C, pp. 1237–1248, 1986.
 J. Bougis, “Les houles périodiques simples,” 1993.
 S. Shin, K. Lee, D. Kim, K. Kim, and K. Hong, “A study on the optimal shape of wave energy conversion system using an oscillating water column,” no. 65, pp. 1663–1668, 2013.
 K. Amarouche, A. Akpınar, N. E. I. Bachari, R. E. Çakmak, and F. Houma, “Evaluation of a high-resolution wave hindcast model SWAN for the West Mediterranean basin,” Appl. Ocean Res., vol. 84, no. December 2018, pp. 225–241, 2019.
 K. Amarouche, A. Akpınar, N. El, I. Bachari, and H. Fouzia, “Wave energy resource assessment along the Algerian coast based on 39-year wave hindcast,” Renew. Energy, 2020.
 K. Amarouche, N. I. Bachari, F. Houma, and A. Boughrira, “Development of a numerical code to simulate the hydrodynamic energy potential, applied at Bou Ismail bay,” Rev. des Energies Renouvelables, vol. Vol. 20, no. N°3, pp. 377–388, 2017.
 C. Verpoorter, “Télédétection hyperspectrale et cartographie des faciès sedimentaires en zone intertidale : application à la Baie de Bourgneuf,” 2009.
 R. L. Folk and W. C. Ward, “brazos river bar : a study in the significance of grain size parameters c . w a r d bar also afforded an opportunity to study the reason for the peculiar , almost universal lack of s e d i m e n t a r y particles in th,” J. Sediment. Petrol., vol. 27, no. 1, pp. 3–26, 1957.
 Y. Balouin, E. Palvadeau, G. Bodere, and V. Hennequin, “Suivi de la dynamiqu