Analyzing and understanding coastline variability and dynamics are important for scientists and policy-makers. This study investigates the long-term process of shoreline change along the Tetouan coast (44 km) for a 60-year period (1958–2018). The shoreline kinematics were analyzed by using high-resolution orthoimages and the Digital Shoreline Analysis System (DSAS). To achieve our objective, the study area was divided into ten beaches grouped into two sectors: (1) the northern sector contained Fnideq, Tres Piedras, Restinga, Smir Marina, Kabila and Golden beaches; (2) the southern sector contained Cabo Negro, Martil, Sidi Abdeslam and Azla beaches. From multi-date shoreline maps, the shoreline change rate was computed using the End Point Rate (EPR), the Linear Regression Rate (LRR) and the Weighted Linear Regression Rate (WLR). Furthermore, the shoreline was classified into eroding and accreting regions through GIS analysis. The accretion and erosion processes along the Tetouan coast were observed to be 94% and 6%, respectively. An analysis of the obtained results showed that the coast was progressive and regressive, at an average rate of 2.81 m/year and − 3.91 m/year, respectively. The overall surface area of the eroded land was approximately 4900,000 m². In addition, the combined action of the cumulative effects of natural processes and various anthropogenic activities (sand mining, tourism infrastructure, construction of marinas and dams) considerably reduced the sedimentary stock and had negative impacts on the coastal dynamics.

分析和理解海岸线的变化性和动态性对于科学家和政策制定者很重要。这项研究调查了60年期间（1958年至2018年）沿Tetouan海岸（44公里）海岸线的长期变化过程。通过使用高分辨率正射影像和数字海岸线分析系统（DSAS）分析了海岸线的运动学。为了实现我们的目标，研究区域分为十个海滩，分为两个部分：（1）北部部分包含Fnideq，Tres Piedras，Restinga，Smir Marina，Kabila和Golden海滩；（2）南部地区包括Cabo Negro，Martil，Sidi Abdeslam和Azla海滩。根据多日期海岸线图，使用终点率（EPR），线性回归率（LRR）和加权线性回归率（WLR）计算海岸线变化率。此外，通过GIS分析，将海岸线分为侵蚀区和增生区。观察到，得土安沿海地区的吸积和侵蚀过程分别为94％和6％。对获得的结果的分析表明，海岸是渐进的和渐退的，平均速率分别为2.81 m /年和− 3.91 m /年。侵蚀土地的总表面积约为4900,000 m²。此外，自然过程和各种人为活动（砂矿开采，旅游基础设施，码头和水坝建设）的累积影响的综合作用大大减少了沉积物储量，并对沿海动力产生了负面影响。