Ocean & Coastal Management最新文献

{"title":"Unlocking sustainability in China's small-scale fisheries: A case study of livelihood analysis in the Bohai Region","authors":"Shu Su ,&nbsp;Chao Zhao ,&nbsp;Yong Chen ,&nbsp;Yi Tang","doi":"10.1016/j.ocecoaman.2024.107405","DOIUrl":"10.1016/j.ocecoaman.2024.107405","url":null,"abstract":"<div><div>Small-scale fisheries (SSF) are a vital component of the global fisheries sector, significantly contributing to food security, livelihoods, and cultural heritage. In China, the SSF sub-sector is substantial, yet it is often overshadowed by large-scale fisheries (LSF), resulting in limited understanding and targeted management measures for SSF. This study uses the Sustainable Livelihoods Framework (SLF) to compare the livelihoods of SSF and LSF in China's Bohai Region, aiming to identify the sustainability challenges faced by SSF and explore potential improvement pathways. The results indicate that the overall livelihood assets of SSF are significantly lower than those of LSF. The failure to differentiate between these two sub-sectors in fisheries management may exacerbate this disparity, further marginalizing SSF. We recommend that China undertake immediate fisheries reforms and outreach efforts aimed at promoting the sustainability of SSF communities. Key strategies include strengthening property rights governance, establishing inclusive decision-making processes for SSF fishers, providing preferential policies and financial support for the most vulnerable SSF actors, and incorporating considerations of SSF's role within the broader socio-ecological system and its interactions with other components into management. Additionally, we suggest the development of a separate management plan for SSF to address their unique needs. This study enhances the understanding of China's SSFs, supports the implementation of SSF Guidelines in China, and offers insights into global SSF management.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"258 ","pages":"Article 107405"},"PeriodicalIF":4.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Seaflower Biosphere Reserve: Research advances on ocean and coastal processes and related hazards for the regional management","authors":"Juan David Osorio-Cano ,&nbsp;Juan Carlos Alcérreca-Huerta ,&nbsp;Brayan Andrés Navarro ,&nbsp;Oscar Álvarez-Silva","doi":"10.1016/j.ocecoaman.2024.107414","DOIUrl":"10.1016/j.ocecoaman.2024.107414","url":null,"abstract":"<div><div>The Seaflower Biosphere Reserve (SBR) stands as an exceptional marine region located in the western Caribbean Sea; this reserve comprises numerous volcanic islands such as the Archipelago of San Andrés, Providencia and Santa Catalina (ASAPSC), islets, cays, atolls, and coral reefs and encompasses a territorial jurisdiction shared among Colombia, Nicaragua, and Jamaica. It was designated as a UNESCO-protected biosphere reserve, given its remarkable biodiversity and endemism. Because of its location in the Caribbean Sea, the reserve is subject to complex regional and local climate patterns including the crossing of Atlantic tropical storms that have impacted the ASAPSC with substantial effects. The socioeconomic development of the inhabitants of this archipelago is intrinsically related to the marine environment. Therefore, studying ocean and coastal processes such as waves climate, oceanic circulation, sea level variability, extreme events intensity and frequency, and their effects on sediment transport, morphological dynamics, and coastal evolution are essential for preserving this valuable oceanic region. Despite its significance, the study of coastal and ocean processes in the SBR is still reduced. Thus, a review and synthesis of peer-reviewed studies is presented here aiming to highlight the advances in coastal processes and related hazards research in the SBR to set up the current knowledge baseline and recognize existing research gaps that might demand further investigation in the near future for the effective coastal management and social development in the SBR.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"258 ","pages":"Article 107414"},"PeriodicalIF":4.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Examining the discrepancy and synergy between marine protected areas and fisheries management in the Bohai Sea, China","authors":"Yunzhou Li ,&nbsp;Jie Yin ,&nbsp;Ming Sun ,&nbsp;Kristin Kleisner ,&nbsp;Emilie Litsinger ,&nbsp;Shems Jud ,&nbsp;Yi Tang ,&nbsp;Yong Chen","doi":"10.1016/j.ocecoaman.2024.107409","DOIUrl":"10.1016/j.ocecoaman.2024.107409","url":null,"abstract":"<div><div>Marine protected areas (MPAs) and other area-based conservation measures used in conjunction with climate-smart fisheries management approaches are important for safeguarding ecosystem and fish population health. However, spatial management approaches are often implemented separately from non-spatial management interventions due to their distinct legislative processes, management priorities, and administrating agencies. As global ocean governance becomes increasingly spatial in compliance with the Kunming-Montreal Global Biodiversity Framework, it is imperative to examine the utility of MPAs as a wider ecosystem approach to complement traditional, single species fisheries management. In this study, we examine current policy and management transformations happening in the Bohai Sea in China and demonstrate the discrepancies and synergies between MPA governance and fisheries management. By evaluating their interactions in objective setting, area selection, and management regulations, we reveal the gaps in coordination and consultancy between the government agencies implementing fisheries and spatial conservation measures. In particular, there is ambiguity or lack of consideration of fisheries management objectives in the framing of conservation area objectives and regulations, and vice versa. In addition, the mismatch between stated objectives of MPAs and their geographic coverage of species distribution ranges suggests insufficient incorporation of fishery expertise in conservation planning. To strengthen the cooperation between fisheries and conservation authorities, we identify opportunities and actions for synergizing management goals and ecosystem-based approaches, improving the design of spatial restrictions, and better integrating spatial management interventions as a critical fisheries and ecosystem-based management approach. These proposed changes will necessitate the creation of processes for engaging the full spectrum of expertise and actors, enhancing collaborations at multiple scales and between different sectors. These findings offer practical insights into bridging the gap between fisheries management and MPAs and could inform further decisions on integrated management in the Bohai Sea and elsewhere.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"258 ","pages":"Article 107409"},"PeriodicalIF":4.8,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial-temporal evolution and drivers of ecological sustainability of coastal fisheries in China","authors":"Fanzhen Kong ,&nbsp;Wanglai Cui","doi":"10.1016/j.ocecoaman.2024.107403","DOIUrl":"10.1016/j.ocecoaman.2024.107403","url":null,"abstract":"<div><div>Marine fisheries are an important source for the survival and economic livelihood of the world's population. With coastal economic development, rapid population growth, and advances in fishing technology, oceans and coastal areas have been placed under greater environmental pressure. Therefore, the sustainability of coastal fisheries must be revisited. This study used the 3D ecological footprint (EF) model and partial least squares (PLS) to analyze the spatial-temporal evolution of the ecological sustainability of coastal fisheries in China, and discuss the direct and indirect impacts of drivers from economic, social, and technological perspectives. Results showed that the gap between per capita EF and per capita biocapacity (BC) of coastal fisheries narrowed until it stabilized from 2010 to 2020. Footprint depth and size wholly showed a fluctuating upward trend. In terms of spatial distribution, footprint depth was high in the north and low in the south, and footprint size was a relatively scattered. Consumption pull had the largest effect on the ecological sustainability of coastal fisheries in China, followed by the economy push, but the effect of technology suppression was not significant. Some policy recommendations for sustainable fisheries governance were proposed in terms of consumption structure transformation, fisheries industry upgrading, and ecosystem-based management. This study indicated that the current development of coastal fisheries in China is sustainable from an ecological supply and demand perspective. The findings provide information on effective coastal fisheries governance and broad coastal and ocean management, and have the potential to provide references for sustainable fisheries governance in other coastal countries with similar contexts.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"258 ","pages":"Article 107403"},"PeriodicalIF":4.8,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on factors affecting resilience behaviours of residents in coastal rural community management in response to typhoons","authors":"Yaying Chen ,&nbsp;Xiaolong Su","doi":"10.1016/j.ocecoaman.2024.107400","DOIUrl":"10.1016/j.ocecoaman.2024.107400","url":null,"abstract":"<div><div>Coastal rural areas are highly vulnerable to a variety of climate-related disasters, including severe typhoons, extreme temperatures, and other environmental changes, each significantly damaging their ecosystems, economies, and communities. To more effectively predict, respond to, and recover from adverse events, and to maintain community stability and prosperity in these areas, building community resilience has become a central objective in coastal management. A comprehensive understanding of residents' resilience behaviours is essential for bolstering community resilience. Existing research primarily focuses on the causes and intervention strategies associated with residents' resilience, yet it neglects the mechanisms underlying residents' resilience behaviours. This study focuses on typhoon disasters in coastal rural areas, applying the Rural Coastal Community Resilience framework for the first time to expand typhoon resilience behaviours among coastal rural residents from five dimensions. It utilizes the widely recognized Theory of Planned Behaviour model, incorporating three critical variables essential for resilience building-risk perception, trust in community agencies, and community support-to analyse the mechanisms of resilience behaviours. The findings indicate that perceived behavioural control is the foremost predictor of resilience behaviours during typhoons and contrary to traditional views, trust in community agencies did not impact behavioural intentions positively. Moreover, community support, acting as a moderating factor, significantly facilitated the transformation from intentions to behaviours, highlighting the importance of external support. These innovative findings provide valuable strategies and insights for resilience building in coastal rural areas.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"258 ","pages":"Article 107400"},"PeriodicalIF":4.8,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Atlantic Tarpon in Cuban fisheries: a historically exploited and very vulnerable species","authors":"Zenaida María Navarro-Martínez ,&nbsp;Dorka Cobián-Rojas ,&nbsp;Servando Valle ,&nbsp;Eddy García-Alfonso ,&nbsp;Aaron Adams ,&nbsp;Thomas K. Frazer ,&nbsp;Jorge Angulo-Valdés","doi":"10.1016/j.ocecoaman.2024.107386","DOIUrl":"10.1016/j.ocecoaman.2024.107386","url":null,"abstract":"<div><div>Atlantic Tarpon (<em>Megalops atlanticus</em>) is a well-known sport-fish species, but for most of the Cuban people it is best known for consumption. Currently, it is listed as vulnerable by Cuban fishery authorities, despite the lack of studies on its ecology and management. A critical knowledge gap is the characterization of the Atlantic Tarpon commercial fishery, including estimates of the fishery's distribution, catch yield, seasonality, historical trends, and size composition. Therefore, this contribution characterizes Cuban Atlantic Tarpon state and private commercial fisheries through the assessment of these factors. Firstly, we visited 42 Cuban fishing ports (and nearby areas) during 2016–2017 and recovered information from fishers about Atlantic Tarpon perceived abundance, seasonality, and incidence in fisheries. Secondly, we analyzed the Atlantic Tarpon captures from the state (1981–2021) and private (2014–2021) commercial fisheries in Cuba. Lastly, we analyzed captures from Villa Clara, where one of the enterprises with higher capture reports occurs (EPICAI), to assess Atlantic Tarpon size composition (2016–2022). Atlantic Tarpon is distributed and captured along all of Cuba's shelf, and the fishery is following a decreasing trend, similar to the Cuban total finfish fisheries. Site-specific dynamics were observed in historical trends and seasonality, with the northeastern and southeastern areas the most important in terms of Atlantic Tarpon captures. Villa Clara samples resulted in numerous Atlantic Tarpon smaller than both its minimum size at maturity (75% &lt; 880 mm) and its minimum legal size for Cuban fisheries (36.77% &lt; 430 mm). The sustainability of Atlantic Tarpon as a fishing resource is of huge concern since it is a very vulnerable species in Cuban fisheries, protected by minor and in some cases ineffective regulations (very small legal minimum size), with synergistic pressures occurring locally, and under the perspective of worse scenarios.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"258 ","pages":"Article 107386"},"PeriodicalIF":4.8,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fishery status of the green tiger shrimp (Penaeus semisulcatus) in Palk Bay, in the southeast coast of India: Local and global perspectives","authors":"Rajkumar Muthusamy ,&nbsp;Saraswathy Lakshmi Pillai ,&nbsp;Saravanan Raju ,&nbsp;Ranjith Lakshmanan ,&nbsp;Kavitha Mookaiah ,&nbsp;Shoba Joe Kizhakudan","doi":"10.1016/j.ocecoaman.2024.107395","DOIUrl":"10.1016/j.ocecoaman.2024.107395","url":null,"abstract":"<div><div>The green tiger shrimp (<em>Penaeus semisulcatus</em> De Haan<em>,</em> 1844), traded as Mandapam flower shrimp internationally, is large-sized shrimp and landed on the coast of Palk Bay, India. This work aimed to describe the status of its fishery and identify challenges for the better management of these resources. The estimated fishery landings of <em>P. semisulcatus</em> in 2022 were 7658 t, with an annual average of 6493 t from 2020 to 2022, contributing to the total penaeid shrimp landings in Palk Bay at 57.6%. The economic value of this fishery was estimated to be around $53 million USDs annually (1 USD = 83.16 INR). Between 2007 and 2022, there was a significant difference between green tiger shrimp and total penaeid shrimp landings in Palk Bay across gears and years. All shrimp from Palk Bay have export markets to Japan, the USA, China, and European countries. The average annual export of <em>P. semisulcatus</em> (2015-16 to 2022–23) was 3532 t ($30.9 million USDs). In 2022–23, the USA was the biggest importer of frozen shrimp, followed by China, the European countries, Southeast Asia, Japan, and the Middle-East countries. We formulated a policy guidelines framework for the management and co-management of the green tiger shrimp fishery in Palk Bay based on a precautionary approach.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"258 ","pages":"Article 107395"},"PeriodicalIF":4.8,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the adaptive capacity of a fisheries social-ecological system to global change","authors":"Vanessa Stelzenmüller ,&nbsp;Jonas Letschert ,&nbsp;Benjamin Blanz ,&nbsp;Alexandra M. Blöcker ,&nbsp;Joachim Claudet ,&nbsp;Roland Cormier ,&nbsp;Kira Gee ,&nbsp;Hermann Held ,&nbsp;Andreas Kannen ,&nbsp;Maren Kruse ,&nbsp;Henrike Rambo ,&nbsp;Jürgen Schaper ,&nbsp;Camilla Sguotti ,&nbsp;Nicole Stollberg ,&nbsp;Emily Quiroga ,&nbsp;Christian Möllmann","doi":"10.1016/j.ocecoaman.2024.107391","DOIUrl":"10.1016/j.ocecoaman.2024.107391","url":null,"abstract":"<div><div>Global change challenges coupled natural-human systems such as fisheries social-ecological systems (SES) because they are confined by spatial and functional ecosystem boundaries. Understanding the capacity of an SES to adapt to changing environmental or socio-economic conditions is complex and entails an analysis of the system's properties such as resilience, resistance, vulnerability, and adaptive capacity. We used a modified Ostrom framework to structure our analyses and to define the SES components, attributes and indicators of the German mixed demersal fishery SES operating in the southern North Sea. Combining analyses of 20-year time series of environmental and socio-economic data with network analysis and semi-structured interviews allowed for a detailed description of past SES adaptations. Hence, our analysis revealed autonomous adaptations of the SES to environmental and socio-economic change, which entailed a shift in target species, fishing strategies as well as a distinct decrease in number of actors. We found that the adaptive capacity of the SES has declined over time, and that the SES is now on the brink of being unable to withstand future environmental and socio-economic change. It is therefore captured in an undesirable state, reflecting a social-ecological trap where social and environmental feedbacks negatively reinforce each other. The main barriers to the adaptive capacity of the SES are related to fishing cultures, economic structures, policy frameworks and increasing conflicts over the use of marine space. An in-depth understanding of the linkages between the identified key SES components and related indicators is a prerequisite for developing future management approaches to enhance the adaptive capacity of SES to global change. Our findings highlight the need for tailored and context-specific co-management approaches for all decision-making processes affecting SES.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"258 ","pages":"Article 107391"},"PeriodicalIF":4.8,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-tier captive relations in the global value chain of tuna: The case of Fair Trade certification of small-scale tuna fishery in Indonesia","authors":"Puspi Eko Wiranthi,&nbsp;Hilde M. Toonen,&nbsp;Peter Oosterveer","doi":"10.1016/j.ocecoaman.2024.107398","DOIUrl":"10.1016/j.ocecoaman.2024.107398","url":null,"abstract":"<div><div>Voluntary sustainability standards have been used as a governance mechanism to ensure the sustainability of fisheries products traded from developing countries. Different standards have become market forces that actors along the value chain are expected to follow to access markets and remain competitive. Recent attention is also being paid to small-scale fisheries, but there is relatively little information about the efficacy of the translation of standards by all actors in the value chain. This study examines how a voluntary sustainability standard is translated from an international buyer down to the producer and the effectiveness of this on social and environmental sustainability. The global value chain (GVC) modular framework is applied to assess the implementation of and compliance with the standard. The analysis is done at the micro, meso, and macro levels. We use the first-ever Fair Trade USA certification for handline small-scale tuna fishery in Maluku, Indonesia, as our case study. The findings indicate that the captive forms of governance prevailing at the micro and meso levels of the value chain vary considerably. This adds a layer of complexity to the extent to which a sustainability standard changes the structure and governance of the value chain. The efficacy of such changes in promoting social and environmental sustainability is constrained by the unequal power dynamics among the various actors operating at the different levels. The findings from this study may contribute to optimizing the value chain for greater sustainability outcomes by involving local actors and accommodating various governance mechanisms to organize the value chain.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"258 ","pages":"Article 107398"},"PeriodicalIF":4.8,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sedimentation analysis of the maritime stretch after dredging activities for widening and deepening Santos’ Port Channel","authors":"Patrícia Dalsoglio Garcia,&nbsp;Daniel Muraro Matheus,&nbsp;Tiago Zenker Gireli","doi":"10.1016/j.ocecoaman.2024.107383","DOIUrl":"10.1016/j.ocecoaman.2024.107383","url":null,"abstract":"<div><div>Occupying a prominent position in the world ranking for container handling, the Port of Santos stands out as one of the largest and busiest port complexes globally. It holds the title of the largest port in the Southern Hemisphere and ranks second in Latin America, second only to the Port of Colón in Panama. In 2010, the port started an expansion process in its navigation channel, reaching a minimum width of 220 m and an average design depth of 15 m, allowing safe passage of ships with drafts up to 13.50 m with an additional increase in this measure up to 1 m at high tide. The adjustments made to the sedimentary dynamics of the estuarine channel had a twofold impact: an increase in the amount of maintenance dredging required to keep the channel navigable, and morphological changes in the Ponta da Praia region. Thus, this study seeks to evaluate the management of maintenance dredging in Santos’ Porto by examining the alterations in sediment dynamics in a section on the Porto Channel. For that, we calculated the rate of sedimentation in the channel after its expansion to a depth of −15.0 m, considering the space and temporal variability of these rates. To determine the sediment contribution, we compared of seabed elevation data from consecutive campaigns performed between 2014 and 2019 in the maritime area of the Porto Channel, considering dredged volumes in the sedimentary balance analysis. In addition, we divided the Channel access into 11 control areas to assess sedimentation rates during non-dredging periods. Therefore, over long periods and considering the entire area, the average sedimentation rate was 4.2 × 10⁶ m³/year, with a standard deviation of 1.7 × 10⁶ m³/year. We noted in short periods between surveys with higher rates, up to 1.57 × 10⁶ m³/month, with no correlation to extreme storm events. In addition, we observed a greater sedimentation rate in the curve stretch (areas 5 to 9) than in other control areas. Here, SPA-hired dredges cannot maintain the required depth with this sedimentation rate. The port authority must provide alternative solutions as the access channel deepens. It must intensify the frequency of dredging in the critical sedimentation areas (to the curved stretch of the channel and the entrance to the estuary) to maintain the target depth. When sedimentation rates are high, the efficiency of dredging operations decreases, rendering navigation with loaded vessels unfeasible.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"258 ","pages":"Article 107383"},"PeriodicalIF":4.8,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}