Potter, C. and Sukanna, T., 2024. Remote sensing of damage inflicted on coastal wetlands of southern Louisiana from tropical storms. Journal of Coastal Research, 40(2), 235–245. Charlotte (North Carolina), ISSN 0749-0208.

Shoreline and wetland loss in Louisiana threatens the future of the state's economy, which is heavily dependent on coastal activities. This study builds on previous satellite remote sensing studies over the Mississippi Delta region to make increasingly detailed assessments of damage inflicted on coastal wetlands of southern Louisiana from tropical storms of different categories. To begin to identify and characterize coastal wetland damage from Hurricanes Katrina (Category 5 in 2005) and Gustav (Category 2 in 2008), Potter and Amer (2020) used a multiband-subtraction methodology developed by Amer, Kolker, and Muscietta (2017) that calculates a Normalized Difference Water Index (NDWI) from Landsat Operational Land Imager images. Analysis of biweekly Landsat NDWI images between the years 2000 and 2011 for the Mississippi River Delta study region suggested that there have been increases in water coverage (and corresponding losses of wetland coverage) over most of the marsh shorelines facing the Gulf of Mexico across the Barataria Basin. The extensive erosion of marshland edges in northern Barataria Bay has continued from 2013 to 2022. Oiling from the Deepwater Horizon spill event in 2010 has contributed to high erosion rates observed after recent tropical storms in Barataria Bay. The combination of Landsat NDWI trend mapping with high-resolution image segmentation of marshland edges and interior features indicates that different types of biophysical damage inflicted on coastal wetlands of southeastern Louisiana from tropical storms can be characterized using this combination of satellite and aerial remote sensing.

Matheen, N. and Kench, P.S., 2024. Morphological response of coral reef islands to the 2019 extreme positive Indian Ocean Dipole event. Journal of Coastal Research, 40(2), 246–256. Charlotte (North Carolina), ISSN 0749-0208.

The influence of the Indian Ocean Dipole (IOD) on winds, waves, and water levels has been studied in considerable detail, but the effect of these anomalous IOD-induced metocean conditions on coastal zones has so far received limited attention. This study analyses the impact of IOD events on the morphological response of coral reef islands by undertaking a case study of five islands in the Maldivian archipelago during the 2019 extreme positive IOD (pIOD) event. A 6-year dataset of shorelines before, during, and after the pIOD event was analysed to establish the magnitude of year-on-year variability and seasonal oscillation trends in the shorelines and thereby identify variability induced by the pIOD event. The results indicate a departure in the shorelines beyond the magnitude of the year-on-year variability during the mature phase of the pIOD event (September–November 2019) and a substantial change in the morphodynamics of the shoreline in the months immediately following the end of the pIOD event (November 2019–April 2020). It was identified that the anomalous metocean conditions during the pIOD event caused a change in the seasonally oscillating shoreline buffer around the island, with potential implications on medium-term island change and overall stability for the vegetated island core. The results showed that it took up to 2 years after the end of the pIOD event for the shorelines to return to their pre-pIOD state.

Torres, J.G.; Botero, C.M., and Jaramillo-Velez, A., 2024. A comparison of beach profile methods from technical, operational, and economical dimensions. Journal of Coastal Research, 40(2), 257–267. Charlotte (North Carolina), ISSN 0749-0208.

Beach profiles provide evidence of the spatiotemporal variability of the coastal surface. Despite being a popular parameter, few references compare a large number of available methods, which would be relevant at both scientific and management levels. This research comparatively analyzed 15 methods for measuring beach profiles, according to three basic criteria: technical, operational, and economic. The comparison was carried out on two beaches in the Gulf of Urabá (Colombia) with different morphological and sedimentary characteristics (dissipative profile with medium sands and reflective profile with pebbles) and on a concrete profile that served as a control. The methods were classified as manual or technological according to their nature and complexity. The total station method was used as a reference method to perform the statistical analysis with the other methods, because it presented less variation compared with other high-precision methods in a control profile. Using the analytical hierarchical process technique, it was found that the manual methods dominated the technological methods. The Puleo method obtained the best result when weighing the three evaluation criteria. As for the economic factors, the manual methods presented a marked difference over the technological ones, and the Emery method was the most economical. These results reject the postulate that insufficient beach profiling data are caused by a lack of budget, because they show that equipment costing just tens of dollars and operated by unqualified personnel are sufficiently reliable and provide consistent results for coastal management.

Shu, Q.; Du, Y.; Chen, Z.; Zhang, A., and Ye, H., 2024. Factors influencing carbon burial in Holocene sediments of the coastal zone of Subei Basin (eastern China). Journal of Coastal Research, 40(2), 268–277. Charlotte (North Carolina), ISSN 0749-0208.

Coastal zone sediments are effective recorders of carbon burial changes in coastal areas under different sedimentary environments. Based on analysis of age, grain size, total carbon (TC), total organic carbon (TOC), total inorganic carbon (TIC), in situ density, and other sediment indicators in the Gangxi (GX) profile of Jianhu County in the Subei Basin, eastern China, the burial fluxes of various carbon components were calculated, and potential factors influencing the carbon content and carbon burial fluxes were examined. The study results showed that the changes in carbon content in the GX profile were closely related to the depositional environment, and the TOC content was higher in the deep freshwater depositional environment. The TIC content was higher in tidal flats and shallow-sea depositional environments. The carbon burial fluxes in the GX profile sediments were affected by factors such as deposition rate and in situ density. The deposition rate was significantly positively correlated with the TC, TOC, and TIC burial fluxes (0.760, 0.59, and 0.86, respectively). The in situ density was significantly negatively correlated with the TC and TOC burial fluxes (–0.62, and –0.71, respectively); however, the negative correlation with TIC was not significant (–0.11). Regional comparisons show that the TOC contents and burial fluxes recorded in the GX profile sediments were lower than those in the modern coastal tidal flat sediments, coastal wetlands, and lakes in eastern China, possibly due to the long burial time of the sediments in the GX profile. During the burial process, part of the organic carbon was mineralized and decomposed through the action of microorganisms. The burial fluxes of organic carbon in the coastal sediments were relatively high, and they represent an effective carbon sequestration sink.

Freitas, A.S.; Pompermayer, L.L.O.; Santos, A.D.O.; Nascimento, M.T.L.; Félix, L.C.; Bila, D.M.; Neto, J.A.B., and Fonseca, E.M., 2024. Sediment toxicity assessment using marine organism bioassays from an urban coastal lagoon (Padre Lagoon, southeastern Brazil). Journal of Coastal Research, 40(2), 278–288. Charlotte (North Carolina), ISSN 0749-0208.

This study aimed to evaluate the environmental quality of Padre Lagoon, an urban coastal lagoon, by using ecotoxicological fossil organisms (dinoflagellate cysts) for biomarker analysis associated with ¹⁴C radiocarbon dating. This is the first toxicity study in this anthropogenic coastal lagoon. A total of 15 surface sediment samples and a sediment core were analysed by radiocarbon dating, grain size, dinoflagellate cysts, and acute toxicity bioassays to assess the influence of land use changes in accelerated urban development in recent decades. Sediments varied between coarse sand and mud at different proportions. Radiocarbon dating placed the oldest age at 470–314 calibrated YBP in the sediment core base according to ¹⁴C radiocarbon dating. Artemia sp. showed high toxicity in both surface and core sediment samples. Vibrio fischeri showed a toxicity gradient in the sediment core and high toxicity in several surface samples. A major dinoflagellate cyst occurrence was observed in the sediment core; however, the highest accumulation was observed in the surface sediments. The data obtained in this study revealed high toxicity in the analysed sediment samples and the need for greater monitoring of this coastal lagoon.

Khonde, N.; Katange, K.; Singh, G.; Kumar, A.; Maurya, D.M.; Giosan, L., and Ghosh, T., 2024. Recent sedimentation across Kori Creek in the western Great Rann of Kachchh Basin: Insights from tidal network changes, sedimentological, clay mineralogical, and rare earth element studies. Journal of Coastal Research, 40(2), 289–302. Charlotte (North Carolina), ISSN 0749-0208.

Kori Creek is one of the most important creeks along the coastline of the Kachchh basin and forms a connecting passage between the Arabian Sea and the Great Rann of Kachchh (GRK) basin. Historically, this region has supported maritime activities between the Kachchh region and Sindh (now part of Pakistan) and witnessed significant landscape changes in the past few centuries. This study demonstrates tidal network changes that occurred over the past four decades (from 1984 to 2020) using satellite data in the Kori Creek region and western GRK basin. The results show that Kori Creek extended more than 30 km landward during the past four decades on account of ongoing tectonic adjustment and headward erosion of tidal channels in the GRK. Short sediment cores collected across the Kori creek in a transect provided evidence of the establishment, extension of tidal channels, and changing dominance of tidal flooding and channel influences on the sediment distribution. The clay mineralogical composition of the Kori Creek region shows the dominance of illite and chlorite over smectite and kaolinite minerals in general. However, from north to south (KC-1 to KC-5), clay compositions show a relative increase in smectite, indicating an increasing contribution due to sediment redistribution from the Indus delta, probably through coastal currents in modern time. The Rare Earth Element composition of the Kori Creek sediments is consistent and shows homogenised sediments that were dominantly sourced from the felsic rocks in the hinterland. Presently, the Kori Creek sediments do not receive significant sediments from rivers in the terrestrial part, the mineralogical composition, and chemical signatures suggest the Indus and the GRK as secondary sources for the Kori Creek modern sediments.

Mohale, H.P.; Jawahar, P.; Jayakumar, N.; Oli, G. Arul; Ravikumar, T., and Bhosle, R., 2024. Ecomorphology of selected penaeid shrimp in the coastal marine waters of Tamil Nadu (southern India). Journal of Coastal Research, 40(2), 303–318. Charlotte (North Carolina), ISSN 0749-0208.

This study investigated how shrimp morphology is influenced by the environment by examining the effects of components like temperature, salinity, substrate type, and water currents; it exposed how these variables affect the development and expression of morphological traits in shrimp species by examining patterns of morphological variation within and between species to demonstrate the contributions of natural selection, genetic drift, and phenotypic plasticity to the diversification of shrimp morphology. The prevalence of shrimp species was: Penaeus indicus > Metapenaeus dobsoni > Metapenaeus brevicornis > Penaeus canaliculatus > Penaeus semisulcatus > Penaeus mergiuensis > Penaeus japonicas > Metapenaeus moyebi > Penaeus latisulcatus > Penaeus monodon. The study results showed negative correlations between biochemical oxygen demand and dissolved oxygen and a harmful effect on the morphological characteristics and growth of shrimp species. According to single factor and comprehensive pollution indices, the water bodies in this study were moderately polluted. P. semisulcatus had higher mean values for the ecomorphology parameters, indicating no adverse effects and a positive relationship. P. semisulcatus shrimp were also found to have decadal growth development and survivability. P. mergiuensis had the lowest growth rates. Results indicated detrimental effects and a bad association when evaluating decadal growth, development, and survival for most of the other shrimp species. This study enhances knowledge of the evolutionary processes that have shaped shrimp adaptations over time and highlights the challenges for sustainability of the biodiversity in the coastal marine waters of Tamil Nadu, India.

Gurung, D.P.; Chen, N.; Waguespack, Y.; Ishaque, A.B., and Chigbu, P., 2024. Assessment of alkaline phosphatase activity in the water column of Maryland Coastal Bays. Journal of Coastal Research, 40(2), 319–337. Charlotte (North Carolina), ISSN 0749-0208.

Understanding maximum alkaline phosphatase activity (V_max) is essential to understand the phosphorus (P) cycle in Maryland Coastal Bays (MCBs). The objectives of this study were to measure V_max in the samples collected from different locations in MCBs and to examine the relationship between V_max and dissolved reactive phosphorus (DRP) concentrations. Water samples were collected at 13 sites from 2014 to 2016, and V_max was measured in whole water by using 4-methylumbelliferyl phosphate as the fluorogenic substrate. Although the measured V_max was affected by multiple factors, P limitation events were recognized from spatial/temporal distributions in V_max values, which might not be reflected by DRP condition. Regression analysis did not yield a significant relationship between DRP and V_max, and monthly averages of DRP and V_max provide better evidence of the connection between DRP and V_max, including P limitation (high V_max) and alkaline phosphatase inhibition (low V_max). Results from this study support the view that V_max is a good indicator of availability of DRP in aquatic environments. More work is needed to further understand the relationship between V_max and DRP, in particular, when strong P limitation occurs in the Bays. Moderate to strong positive relationships were observed between V_max and chlorophyll a. Moderately negative relationships were observed between V_max and salinity and between V_max and pH, which may be attributed to freshwater inputs. Likewise, a moderate positive relationship was observed between V_max and temperature for only some months.

Andrade, H.A.A.; Rodrigues, F.C.G.; Fletcher, C.H.; Casey, G., and Giannini, P.C.F., 2024. Winter sedimentology and morphology of the Maçambaba beach–foredune system, SE Brazil. Journal of Coastal Research, 40(2), 338–352. Charlotte (North Carolina), ISSN 0749-0208.

The Maçambaba Holocene coastal barrier and dune system in Rio de Janeiro state, Brazil, is located immediately west of an abrupt orientation change from SW-NE to W-E on the SE Brazilian coastline. The eolian deposits are formed by winds from the SW, associated with polar air masses advancing in austral winter, and winds from the NE, associated with summer monsoon and upwelling intensification. The active beach–foredune system consists of intermediate reflective beaches and ramp incipient foredunes in the western (km 0–km 14) and central (km 15–km 35) sectors of the barrier and intermediate to dissipative beaches with more common ridge incipient foredunes in the eastern sector (km 36–km 48). This pattern from W to E indicates a change in the beach–foredune system from a more erosional regime with lower sand supply in the west to a more depositional setting in the east. Measured at the swash line, winter mean grain size fines and granulometric sorting increases from W to E, evidence of a net longshore drift in this direction. The increase in eolian sand supply toward the east favors sand reworking by SW (onshore) winds in the winter; consequently, coastal dunes are well developed in this sector. Overwash processes frequently develop where eolian deflation favors marine inundation during winter swell events. After their formation, washover fans are typically reworked by reverse winds from the NE (offshore) in austral summer. Throughout the entire barrier system, seasonal shifts in both swell orientation and wind direction are dominant climatic factors determining the development of washover fans, blowouts, and parabolic dunes with opposing migration directions. Investigating the effect of this climatic seasonality on the beach–foredune system is critical to understanding coastal response to storm events and climatic variations on longer timescales.

A barreira costeira holocênica de Maçambaba localiza-se no estado do Rio de Janeiro, Sudeste do Brasil, imediatamente a oeste de uma mudança abrupta de orientação na costa, de sudoeste-nordeste para oeste-leste. Os depósitos eólicos são formados pelos ventos de sudoeste, associados às massas de ar polar que avançam no inverno austral, e pelos ventos de nordeste, associados à monção de verão e à intensificação da ressurgência. Nos setores central e oeste da barreira, o sistema praia-duna ativo consiste em praias intermediárias refletivas e dunas frontais incipientes em rampa. No setor leste, ele é composto por praias intermediárias dissipativas e dunas frontais incipientes em cordão. A passagem de dunas frontais em rampa, na parte oeste da barreira, para dunas frontais dominantemente em cordão, na parte leste, indicam que o aporte de areia eólica é maior a leste que a oeste. Nas amostras coletadas no espraiamento, a seleção granulométrica melhora e o tamanho médio de grão diminui de oeste para leste, o que é sugestivo de transporte longitudinal de sedimentos nesse rumo. O crescimento do aporte sedimentar para leste aumenta o retrabalhamento eólico pelos ventos de sudoeste (onshore) no inverno, e consequentemente as dunas costeiras são melhor desenvolvidas no setor leste, incluindo a formação de rupturas de deflação (blowouts). Neste setor, processos de sobrelavagem costeira frequentemente se desenvolvem onde a deflação eólica favorece a inundação marinha durante eventos de swell no inverno. Após sua formação, os leques de sobrelavagem são geralmente retrabalhados pelos ventos reversos de nordeste (offshore) no verão austral. Na barreira como todo, mudanças sazonais na orientação do swell e na direção do vento são fatores climáticos dominantes que determinam o desenvolvimento e deposição de leques de sobrelavagem, blowouts e dunas parabólicas com direções de migração opostas. Investigar o efeito dessa sazonalidade climática no sistema praia-duna ativo é fundamental para entender a resposta costeira a eventos de tempestade e variações climáticas em escalas de tempo mais longas.

Nose, T.; Babanin, A., and Ewans, K., 2024. Directional characteristics of infragravity waves during storms in the nearshore coastal region. Journal of Coastal Research, 40(2), 353–365. Charlotte (North Carolina), ISSN 0749-0208.

Presented is an infragravity wave analysis of field observations that were made using acoustic Doppler wave gauges for nearshore waters with depths typically less than 10 m. The study found a correlation between total infragravity wave energy with the wind-generated waves and the relative depth, which was robust for high waves during storms. Directional distributions of nearshore infragravity waves were derived from Acoustics Doppler gauges (Acoustic Waves and Currents (AWACs)); it was found that bimodal directional peaks emerged during storms. Previous infragravity wave studies suggest dominant energy is in the propagation sector outward from the coast, i.e. reflected waves, but the analysis here showed that the dominant infragravity wave energy was in the propagation sector incident to the coast. A numerical model that models free infragravity wave evolution from the bound infragravity wave liberation was used to reproduce the observed bimodal peaks during several storm events; however, in contrast to the observations, the dominant energy of the modelled infragravity waves is in the propagation sector outward from the coast. The AWAC directional analysis and its comparison with the model indicate that the breakpoint generation mechanism may contribute to the shoreward propagating infragravity wave energy during storm events. Using the correlation obtained from the AWAC data between the total infragravity wave energy and the relative depth parameter, an empirical model was developed to simulate the directionally discretised infragravity wave heights. The feasibility was demonstrated with reasonable skill values for the total and reflected model infragravity wave heights, which may be a computationally inexpensive tool to provide bulk infragravity wave statistics for preliminary engineering designs. This study demonstrated that AWAC data are useful for infragravity wave studies in nearshore coastal waters.

Raygoza-Alcantar, L.N.; Vázquez, G., and Rodríguez-Zaragoza, F.A., 2024. Spatiotemporal relationship between diatom diversity and environmental gradients at La Mancha coastal lagoon (Veracruz, Mexico). Journal of Coastal Research, 40(2), 366–381. Charlotte (North Carolina), ISSN 0749-0208.

This study analyzed the composition and distribution of diatoms in the La Mancha tropical coastal lagoon, Veracruz, Mexico, under different environmental conditions. Water samples were collected from the surface and bottom of the lagoon at five sites during the “nortes” (cold winter fronts), dry, and rainy seasons. The physical and chemical variables of the lagoon water were also analyzed. Diatom taxa were identified and quantified. Sixty-five taxa were determined and classified according to functional groups. Sites 1 and 2 were considered potential sources of nutrients and folin phenol active substances (FPAS). In addition, two horizontal gradients were observed. The first concerned nutrient concentration, which increased in the area of the mouth of the Caño Grande River and decreased towards the bar. The second was a salinity gradient characterized by high values in the area of the bar and decreasing values towards the river mouth. Diatom richness and diversity were higher in the areas influenced by the opening of the bar and the Caño Grande River discharges in the “nortes” season. Diatom composition varied across seasons, sites, and depth levels; functional groups only varied between sites (p ≤ 0.05). A redundancy analysis recorded the species that responded to the salinity and temperature gradients, including Paralia sulcata, Odontella spp., and Grammatophora oceanica. The species that responded to high nutrient concentrations, total phosphorus, and transparency were Aulacoseira granulata, Stephanocyclus meneghinianus, Ulnaria ulna, Gyrosigma acuminatum, Navicula subrhynchocephala, and Amphipleura pellucida in different seasons in the area close to the river mouth and mangrove swamp. The correlation between diatom density and FPAS indicates that Psammodictyon constrictum and Amphiprora pseudoduplex have optimal growth when the FPAS concentration increases.

Huang, W.; Li, S.; Lu, Y., and Zhang, R., 2024. Hydrodynamic characteristics of an ecological revetment cavity structure under the propagation of ship-generated waves in a restricted channel. Journal of Coastal Research, 40(2), 382–394. Charlotte (North Carolina), ISSN 0749-0208.

With the rapid development of inland waterway transportation and the rapid increase of ship traffic in restricted channels, the role of ship-generated waves on the restricted channel shore slope becomes increasingly significant. Some river bank protection projects use cavity structures to prevent bank slopes from being scoured and have achieved remarkable results. However, the hydrodynamic characteristics under the action of ship traveling waves inside and outside the cavity are not yet clear. Thus, this paper studies the time and frequency domain characteristics of ship-generated wave fluctuations, flow velocity distribution characteristics, and turbulence distribution characteristics in the cavity, under the action of ship-generated waves, by conducting self-propelled ship model flume tests using a new type of cavity shore protection structure applied to a restricted channel. This study investigates the application of such a structure to shallow water coastal areas with frequent ship traffic. The corresponding results demonstrate that during the ship traveling wave transfer to the cavity, the fluctuation frequency did not change significantly, and fluctuation energy concentrated in the frequency range of 0–1.5 Hz. The high-frequency (0.40–1.5 Hz) energy is concentrated in the secondary wave process, and the low-frequency (0–0.40 Hz) energy is observed throughout the fluctuation process. The cavity structure changes the flow velocity from low-frequency periodic flow to high-frequency oscillatory flow, and the frequency of flow velocity change tends to be uniformly distributed with significantly enhanced turbulence. The cavity's maximum wave height, flow velocity, and turbulence energy positively correlate with the self-propelled velocity of the vessel V_c. Moreover, the characteristic values increase slowly for V_c in the subcritical velocity region (Fr_h < 0.84), and the characteristic values increase sharply for V_c in the transcritical velocity region (0.84 < Fr_h < 1.12).

Meenatchi, S.; Iburahim, S.A.; Nayak, B.B.; Rathinam, R.B.; Paul, T.N.; Seenivasan, P.; Ramteke, K.; Ramanan, S.S.; and Anantharaja, K., 2024. A meta-analysis of artemia global research over seven decades (1949–2021). Journal of Coastal Research, 40(2), 395–407. Charlotte (North Carolina), ISSN 0749-0208.

Brine shrimp are little planktonic crustaceans found all over the world in hypersaline habitats. Brine shrimp populations are found in numerous inland salt lakes and coastal salterns across the world. Scientometrics is a branch of statistics concerned with measuring and analyzing scholarly publications. The current study used a Web of Science database to thoroughly analyze and document the Artemia research output over the last seven decades. For this study, 9738 papers were examined using R software to evaluate the scientific productivity in this specified topic area. The global publishing share, rank, and evolution in terms of research and bibliometric indices, such as total citations, h index, and average number of citations per paper, were analyzed. The United States ranks first among the most productive nations in terms of total publications, accounting for 18.895%. India came in sixth place, accounting for 5.812% of total publications. The findings of the current study revealed the trend of artemia-related research studies published between 1949 and 2021. This study also highlighted the focal areas on this issue, about which future topics of research can be chosen for conservation and sustainable utilization of these vital resources.

Wang, Y. and Du, Y., 2024. Eutrophication evaluation assessment based on the multidimension cloud model and projection pursuit method. Journal of Coastal Research, 40(2), 408–417. Charlotte (North Carolina), ISSN 0749-0208.

Lake eutrophication evaluation is challenging because the evaluation process is uncertain and random and monitored data are usually inaccurate within a wide range. To deal with the uncertainty and randomness in evaluation eutrophication, the integration of multidimension cloud model (MDCM) and projection pursuit (PP) method were proposed, called the MDCM-PP method. The MDCM considers each evaluation factor as a one-dimension attribute, and the weights of evaluation factors were determined by PP method. In addition, the uncertainty and fuzziness of data was processed by triangular fuzzy numbers (TFNs). The combination of the MDCM-PP model and TFNs was applied to Dongting Lake in China to evaluated eutrophication statuses. The results indicated that the eutrophication levels in the East Dongting Lake were more serious than the South Dongting Lake and West Dongting Lake, which is in accordance with other research. The proposed method can consider fuzziness and randomness with the MDCM-PP model and TFNs in the eutrophication evaluation, which can also be applied to other evaluation processes with character of fuzziness and randomness.

Gharnate, A.; Taouali, O., and Mhammdi, N., 2024. Shoreline change assessment of the Moroccan Atlantic coastline using DSAS techniques. Journal of Coastal Research, 40(2), 418–435. Charlotte (North Carolina), ISSN 0749-0208.

Coastal zones are critical from a physical, social, and economic point of view; however, most of the world's coastal zones are highly vulnerable to coastal erosion because of high population density, tourist attractions, and developed economies. To support mitigation strategies, a coastal erosion vulnerability assessment is essential to generate accurate information on this significant phenomenon. This study presents an integrated approach to coastal erosion vulnerability using a geospatial assessment of coastal dynamics in the Moroccan Atlantic coastal region between Rabat and Casablanca. To contribute to current and future knowledge of the study area's coastline dynamics, a cartographical and statistical approach was used to calculate historical rates of coastline change using aerial photos and satellite images from 1969 to 2022. To accomplish this, the images have been followed by the digitalization of the coastlines, as contained in the images created by using software ArcGIS10.8. These digitalized shorelines were subsequently incorporated into the digital shoreline analysis system, which provided multidate maps with graphical end point–rate (EPR) values. The results for Oued Cherrat estuary and the adjacent sandy beach indicate a general phase of erosion, with the average overall EPR value having reached –2.00 m/y, with the notable exception of a small part of the sandy beach, where progradation manifested itself in the form of an EPR value of +0.10 m/y. The Oued Nfifikh estuary is showing more erosion than the Oued Cherrat estuary. The retreat has affected the greater part of the area, reaching a maximum EPR speed of –5.00 m/y, with the possible exception of a smaller portion that has seen the shoreline progress at an average speed equal to +0.75 m/y. The resulting data may be used by the appropriate authorities to help effectively protect coastlines from erosion and to mitigate its impact on the environment and coastal properties.