Located in the south of the western Mediterranean, in the central Algerian region, the eastern coast of Cherchell is characterized by its ecological, agricultural, tourist, cultural and patrimonial vocations and by its low topography in many places. It has participated over time in the economic development of the region (agriculture and beach tourism). In recent years, this coast, like all the world's coastlines, has been subject to several coastal hazards such as marine flooding. Flooding is the most frequent and most important threat in terms of induced impacts, and therefore any management plan needs to assess it, noting that no such study has been carried out in the region despite its economic importance. The objective of this paper is to assess the land area flooded by extreme sea levels. Therefore, by combining a high-resolution numerical terrain model with geographic information systems (GIS), the areas at risk of flooding were mapped. The results indicate that most of the flooded land is at the annual return period of extreme sea levels, which is explained by the low topography of the beaches (Hamdania and Bella) and the wadi plains (El Hachem and El Bellaa) near the coast, whereas the extreme marine levels of hundred-year return period do not really exacerbate the flooding risks, due to the mountainous topography of the region which becomes progressively higher when moving away from the coast and the wadi plains. These results represent a basic tool for local managers and decision-makers to adapt planning practices and policies for a better management of these vulnerable areas, and a good adaptation in case of risk.

切尔谢尔东海岸位于地中海西部南部，阿尔及利亚中部地区，以生态、农业、旅游、文化和世袭为特征，多处地势低洼。随着时间的推移，它参与了该地区的经济发展（农业和海滩旅游）。近年来，与世界上所有的海岸线一样，该海岸也遭受了多种海岸灾害，例如海洋洪水。就诱发影响而言，洪水是最常见和最重要的威胁，因此任何管理计划都需要对其进行评估，并指出尽管该地区具有经济重要性，但尚未在该地区开展此类研究。本文的目的是评估被极端海平面淹没的陆地面积。所以，通过将高分辨率数值地形模型与地理信息系统 (GIS) 相结合，绘制了面临洪水风险的区域。结果表明，大部分被淹没的土地处于极端海平面的年度重现期，这可以通过海滩（Hamdania 和 Bella）和靠近海岸的干河平原（El Hachem 和 El Bellaa）的低地势来解释，而百年重现期的极端海平面并没有真正加剧洪水风险，因为该地区的山区地形随着远离海岸和干河平原而逐渐升高。这些结果代表了地方管理者和决策者调整规划实践和政策以更好地管理这些脆弱地区以及在发生风险时进行良好适应​​的基本工具。