Anthropocene Coasts最新文献

{"title":"Establishment and application of ecological health evaluation system for urban and rural rivers in Yangtze Estuary","authors":"Biaobiao Peng, B. Shi, Y. Wang, Jingjing Li, Xinmiao Zhang, Xiaoyu Liu, L. Mo, A. Shen, Y. Ding","doi":"10.1007/s44218-023-00024-8","DOIUrl":"https://doi.org/10.1007/s44218-023-00024-8","url":null,"abstract":"","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86481486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sedimentary records reveal two stages of evolution of the Abandoned Yellow River Delta from AD1128 to AD1855: vertical accretion and land-forming","authors":"Chengfeng Xue,&nbsp;Yang Yang,&nbsp;Chaoran Xu,&nbsp;Mengyao Wang,&nbsp;Jianhua Gao,&nbsp;Xibin Han,&nbsp;Jianjun Jia","doi":"10.1007/s44218-023-00023-9","DOIUrl":"10.1007/s44218-023-00023-9","url":null,"abstract":"<div><p>In AD1128, the Yellow River shifted its course from the Bohai Sea to the South Yellow Sea (SYS) due to anthropogenic dike excavation, starting the development of the Abandoned Yellow River Delta (AYRD) that lasted for more than 700 years (AD1128-1855). However, the sediment flux of the abandoned Yellow River into the sea is in a state of change due to human activities, and the growth process of the AYRD is not well understood. Here, we investigate the growth process of the AYRD and its sedimentary record characteristics over the last millennium based on three cores collected from the AYRD.</p><p>The results show that the main sediment types in the AYRD are silt, mud and sandy silt. After AD1128, the grain size components in the sediments of the AYRD showed significant stage changes with the sand content first starting to decrease. The clay content increased and remained at a high percentage in the middle to late 14th century, followed by a sharp increase from the mid-16th to the mid-17th century, due to a further increase in sediment flux from the abandoned Yellow River into the sea. A slight increase in the proportion of sand content during the final stage of the transition from subaqueous delta to terrestrial delta is a distinctive feature of the sedimentary record, and this change persists for 10 ~ 90 years in different core records.</p><p>This study further proposes a schematic model of the development of the AYRD: (a) before the 16th century, the sediments were deposited mainly in the estuary and nearshore, with rapid vertical accretion; (b) After the 16th century, the horizontal land formation was the main focus, and the rate of seaward extension increased rapidly. This model also reflects the following pattern: when the sediment flux from the river into the sea is certain, the rate of land formation is inversely proportional to the rate of vertical accretion. The dominant factors affecting the evolution of the AYRD are the sediment flux into the sea and initial submerged topography, with less influence from sea level changes. Hydrodynamic erosion by wave and tidal forces from the outer delta began to dominate after the interruption of sediment supply due to the Yellow River mouth northward to the Bohai Sea in AD1855. This study has important implications for understanding the growth and evolution of deltas under the influence of human activities.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sedimentary records reveal two stages of evolution of the Abandoned Yellow River Delta from AD1128 to AD1855: vertical accretion and land-forming","authors":"Chengfeng Xue, Yang Yang, Chaoran Xu, Mengyao Wang, J. Gao, Xibin Han, J. Jia","doi":"10.1007/s44218-023-00023-9","DOIUrl":"https://doi.org/10.1007/s44218-023-00023-9","url":null,"abstract":"","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75042377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing the Anthropocene coastal infrastructure sustainability using the approaches developed by the London Convention and Protocol","authors":"GiHoon Hong, C. Vivian, C. Vogt, F. Haag, F. Zuo, Kai Qin","doi":"10.1007/s44218-023-00022-w","DOIUrl":"https://doi.org/10.1007/s44218-023-00022-w","url":null,"abstract":"","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"90 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80395591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing the Anthropocene coastal infrastructure sustainability using the approaches developed by the London Convention and Protocol","authors":"GiHoon Hong,&nbsp;Christopher Vivian,&nbsp;Craig Vogt,&nbsp;Fredrik Haag,&nbsp;Fang Zuo,&nbsp;Kai Qin","doi":"10.1007/s44218-023-00022-w","DOIUrl":"10.1007/s44218-023-00022-w","url":null,"abstract":"<div><p>The water’s edge is a critically important and efficient location to trade with other partners by connecting inland water channels and sea lanes and to obtain food provisions from the biologically diverse and productive sea. Human civilization has built around the ports and harbors by constructing fixed structures to support waterborne transport and enhance or sustain city functions for millennia. These artificially fixed structures are not in natural equilibrium with the environment (water and sediment). Access channels and the sea bottom adjacent to piers are often dredged to accommodate larger ships. Bottom sediment dredging is a part of port management. Where to place the dredged material is of primary concern for port authorities because of its sheer volume and the potential to be chemically contaminated. The London Convention and the London Protocol (LC/LP) are international treaties that provide a process in preventing pollution from dumping of contaminated material at sea, and finding sound alternatives such as confined disposal facilities, and using clean dredged material in wetland creation or beach nourishment, based on the precautionary approach. The Anthropocene (Anthropocene refers to the most recent period in Earth’s history when human activity started to impact significantly on the climate and ecosystems.) coast of ports, harbors, wetlands, shorelines, and beaches of the coastal megacities faces tremendous challenges in managing navigational and shoreline infrastructure in view of sea level rise and climate change. Dredged sediments are a resource and are a key to protection of shorelines. The benefits of being members of the LC/LP treaties are that there is a wealth of various national experiences on sediment management available via the network of LC/LP national experts and in the records of the LC/LP’s Meetings of Contracting Parties.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71909794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Erosion and accretion patterns on intertidal mudflats of the Yangtze River Estuary in response to storm conditions","authors":"Xiaoyu Liu, Fei Xing, B. Shi, Guoxiang Wu, J. Ge, Biaobiao Peng, Mingliang Li, Y. Wang","doi":"10.1007/s44218-023-00020-y","DOIUrl":"https://doi.org/10.1007/s44218-023-00020-y","url":null,"abstract":"","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84554494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Erosion and accretion patterns on intertidal mudflats of the Yangtze River Estuary in response to storm conditions","authors":"Xiaoyu Liu,&nbsp;Fei Xing,&nbsp;Benwei Shi,&nbsp;Guoxiang Wu,&nbsp;Jianzhong Ge,&nbsp;Biaobiao Peng,&nbsp;Mingliang Li,&nbsp;Ya Ping Wang","doi":"10.1007/s44218-023-00020-y","DOIUrl":"10.1007/s44218-023-00020-y","url":null,"abstract":"<div><p>Understanding of erosion and accretion patterns over intertidal mudflats during storm periods is vital for the management and sustainable development of coastal areas. This study aimed to investigate the effect of the 2014 storm Fung-wong on the erosion and accretion patterns of the Nanhui intertidal mudflats in the Yangtze estuary, China, based on field measurements and Delft3D numerical modeling. Results show that prolonged easterly winds during the storm enhance the flood velocity, weaken the ebb velocity, and even change the current direction. The current velocity, wave heights, and bed-level changes increased by 1–1.43 times, 2.40–3.88 times, and 2.28–2.70 times than those of normal weather, respectively. The mudflats show a spatial pattern of overall erosion but increasing erosion magnitude from the high (landward) mudflat to the low (seaward) mudflat during the storm. The magnitude of bed-level change increases with increasing wind speed, but the spatial pattern of erosion and accretion remains the same. The main reason for this pattern is the longer submersion duration of the low mudflat compared with the high mudflat, so the hydrodynamic process is longer and stronger, leading to an enhancement in bed shear stress and sediment transport rate. Wind speed increases the hydrodynamic intensity but does not affect on the submersion duration over each part of the intertidal mudflat. This study is helpful to improve the understanding of physical processes during storms on intertidal mudflats and provides a reference for their protection, utilization, and management, as well as for research in related disciplines.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Summer hypoxia in Bohai Sea caused by changes in phytoplankton community","authors":"Hao Wei,&nbsp;Liang Zhao,&nbsp;Haiyan Zhang,&nbsp;Youyu Lu,&nbsp;Wei Yang,&nbsp;Guisheng Song","doi":"10.1139/anc-2020-0017","DOIUrl":"10.1139/anc-2020-0017","url":null,"abstract":"<div><p>In the deep central part of the Bohai Sea off the coast of northern China, long-term observations show significantly lower dissolved oxygen (DO) concentration near the bottom in summer during 2006–2018 than during 1978–2005. The decrease in bottom DO is closely linked to changes in phytoplankton community driven by nutrient structure changes in the water column. From literature review, observations in the phytoplankton community structure indicate an increase in the abundant proportion of dinoflagellate to diatom and miniaturization since the 21st century. The new dominate species of dinoflagel-late and the pico- and nano-celled algae detritus, with slow sinking rate and long residence time, favor the efficient oxygen consumption in the water column and lead to oxygen depletion enhancement and DO concentration decrease after 2006. Analyses also suggest that water temperature, stratification, and resuspension of sediment play less significant roles in long-term variations of DO. The linkage of hypoxia formation to changes of phytoplankton community answers why hypoxia in the Bohai Sea started to occur in the recent decade while eutrophication began since the 1980s. The identified new mechanism of hypoxia formation may be applicable to other coastal seas where eutrophication has led to changes in the phytoplankton community, and should be considered in biogeochemical models.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"4 1","pages":"77 - 86"},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Swell wave progression in the English Channel: implications for coastal monitoring","authors":"Thomas Dhoop,&nbsp;Charlie Thompson","doi":"10.1139/anc-2021-0008","DOIUrl":"10.1139/anc-2021-0008","url":null,"abstract":"<div><p>Energetic swell waves, particularly when they coincide with high water levels, can present significant coastal hazards. To better understand and predict these risks, analysis of the sea levels and waves that generate these events and the resulting coastal impacts is essential. Two energetic swell events, neither of which were predicted by modelled flood forecasts, occurred in quick succession in the English Channel. The first event, on 30 January 2021, produced moderate significant wave heights at or just below the 0.25 year return period along the southwest English coast, but combined with significant swell caused overtopping at East Beach in West Bay and at Chesil Beach. The second event, on 1 February 2021, generated the highest wave energy periods measured at many locations along the southern English coastline and, at high water, caused waves to run up over the promenades at Poole Bay and Christchurch Bay and caused overtopping at Hayling Island. Both events are described in detail, and their spatial footprints are mapped through a joint return period analysis using a copula function. It is found that typical joint return period analysis of water level and significant wave height underestimates potential impacts, while a joint consideration of water level and wave power (<i>P</i>) describes the 31 January event better and a joint consideration of water level and energy period (<i>T</i>_e) best describes the 1 February event. Therefore, it is recommended that <i>T</i>_e and P are adopted for coastal monitoring purposes, and that future studies further explore the use of both parameters for swell monitoring.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"4 1","pages":"281 - 305"},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Climate change and human influences on sediment fluxes and the sediment budget of an urban delta: the example of the lower Rhine—Meuse delta distributary network","authors":"J. R. Cox,&nbsp;F. E. Dunn,&nbsp;J. H. Nienhuis,&nbsp;M. van der Perk,&nbsp;M. G. Kleinhans","doi":"10.1139/anc-2021-0003","DOIUrl":"10.1139/anc-2021-0003","url":null,"abstract":"<div><p>Deltas require sufficient sediment to maintain their land area and elevation in the face of relative sea-level rise. Understanding sediment budgets can help in managing and assessing delta resilience under future conditions. Here, we make a sediment budget for the distributary channel network of the Rhine—Meuse delta (RMD), the Netherlands, home to the Port of Rotterdam. We predict the future budget and distribution of suspended sediment to indicate the possible future state of the delta in 2050 and 2085. The influence of climate and anthropogenic effects on the fluvial and coastal boundaries was calculated for climate change scenarios, and the effects of future dredging on the budget were related to port development and accommodation of larger ships in inland ports. Suspended sediment rating curves and a 1D flow model were used to estimate the distribution of suspended sediment and projected erosion and sedimentation trends for branches. We forecast a negative sediment budget (net annual loss of sediment) for the delta as a whole, varying from −8 to −16 Mt/year in 2050 and −11 to −25 Mt/year by 2085, depending on the climate scenario and accumulated error. This sediment is unfavourably distributed: most will accrete in the northern part of the system and must consequently be removed by dredging for navigation. Meanwhile, vulnerable intertidal ecosystems will receive insufficient sediment to keep up with sea-level rise, and some channels will erode, endangering bank protection. Despite increased coastal import of sediment by estuarine processes and increased river sediment supply, extensive dredging for port development will cause a sediment deficit in the future.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"4 1","pages":"251 - 280"},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}