Anthropocene Coasts最新文献_第7页

Seasonal regulation of river discharge by the cascade reservoirs in the Lancang River and its effect on downstream freshwater and estuarine saltwater intrusion 澜沧江梯级水库流量的季节性调节及其对下游淡水和河口盐水入侵的影响

Anthropocene Coasts Pub Date : 2023-03-20 DOI: 10.1139/anc-2021-0007

Jianrong Zhu, Wei Qiu, Chuanmin Tang, Xinyue Cheng

{"title":"Seasonal regulation of river discharge by the cascade reservoirs in the Lancang River and its effect on downstream freshwater and estuarine saltwater intrusion","authors":"Jianrong Zhu, Wei Qiu, Chuanmin Tang, Xinyue Cheng","doi":"10.1139/anc-2021-0007","DOIUrl":"10.1139/anc-2021-0007","url":null,"abstract":"This study assesses the seasonal regulation of river discharge by hydropower dam-induced cascade reservoirs in the Lancang River and its effect on downstream freshwater and estuarine saltwater intrusion. There are eight main reservoirs in the Lancang River, with a total regulation capacity of 25.67 billion m3, which regulates river discharge by conserving water in the flood season and releasing water in the dry season. River discharge during the dry season from 1960 to 2009 accounted for 21% of the annual discharge before the cascade reservoirs were constructed and increased to 33% from 2010 to 2015 after the cascade reservoirs were constructed at the Jinghong hydrological station, which is the lowermost station in the Lancang River. During the 2016 extreme drought in the lower Mekong River basin, the river discharge increased by 550, 367, 1283, 969, and 524 m3/s in January, February, March, April, and May, respectively, regulated by the cascade reservoirs at the Jinghong hydrological station. Considering runoff, tides, wind, and continental shelf currents, a high-resolution three-dimensional numerical model was used to simulate the effect of regulation of river discharge by the cascade reservoirs in the Lancang River on the saltwater intrusion in the Mekong River Delta (MRD). The simulation results show that the seasonal regulation of river discharge by the cascade reservoirs in the Lancang River weakens estuarine saltwater intrusion during the dry season, especially in the sand bar areas, which is much more significant in the extreme dry season of 2016. The seasonal regulation of river discharge by the reservoirs in the Lancang River makes the seasonal distribution of downstream river discharge more uniform, favoring downstream freshwater utilization and alleviating flood disasters and saltwater intrusion in the MRD.","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"4 1","pages":"233 - 250"},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910204","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}

引用次数: 0

A DSAS-based study of central shoreline change in Jiangsu over 45 years 基于DSAS的江苏中部海岸线45年变化研究

Anthropocene Coasts Pub Date : 2023-03-20 DOI: 10.1139/anc-2020-0001

Yuan Song, Yongming Shen, Ruofan Xie, Jialin Li

{"title":"A DSAS-based study of central shoreline change in Jiangsu over 45 years","authors":"Yuan Song, Yongming Shen, Ruofan Xie, Jialin Li","doi":"10.1139/anc-2020-0001","DOIUrl":"10.1139/anc-2020-0001","url":null,"abstract":"<div><p>A large-scale sand ridge group is distributed in the central Jiangsu coastal area, and a deposition muddy sea bank was developed in the nearshore area. Quantitative monitoring of coastline changes is of great significance for tidal beach development and protection. The shorelines of the central coast of Jiangsu within six periods (1973–2018) were extracted in this study, and their length changes over the years were analyzed. The Digital Shoreline Analysis System (DSAS) was employed to generate a cross section perpendicular to the baseline and calculate the linear regression rate (LRR) of the shoreline, changes in end point rate (EPR), and net shoreline movement (NSM), based on which the shoreline change features were analyzed. The DSAS results indicated that the shorelines in the study area maintained fluctuating growth and presented a continuous advancing trend towards the sea. From the changes in shoreline evolution distance during 1973–2018, the advancing shorelines in the study area accounted for over 50% of the total shorelines and presented first rising and then declining trends with the period of 2003–2013 taken as the time boundary. The average shoreline change rate was 207 m/year, and the periods with the highest change degrees were 1983–1993 and 1993–2013. The shoreline change tended to be stable during 2013–2018, and only a few estuaries and ports underwent obvious erosion and sedimentation.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"4 1","pages":"115 - 128"},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910101","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}

引用次数: 3

Correction: Modulation of sediment load recovery downstream of Three Gorges Dam in the Yangtze River 修正:长江三峡大坝下游泥沙负荷恢复的调节

Anthropocene Coasts Pub Date : 2023-03-20 DOI: 10.1007/s44218-023-00021-x

Chunyan Zhu, Yuning Zhang, Dirk Sebastiaan van Maren, Weiming Xie, Leicheng Guo, Xianye Wang, Qing He

引用次数: 0

The vulnerability of tidal flats and multi-channel estuaries to dredging and disposal 滩涂和多通道河口易受疏浚和处置的影响

Anthropocene Coasts Pub Date : 2023-03-20 DOI: 10.1139/anc-2020-0006

Wout M. van Dijk, Jana R. Cox, Jasper R. F. W. Leuven, Jelmer Cleveringa, Marcel Taal, Matthew R. Hiatt, Willem Sonke, Kevin Verbeek, Bettina Speckmann, Maarten G. Kleinhans

{"title":"The vulnerability of tidal flats and multi-channel estuaries to dredging and disposal","authors":"Wout M. van Dijk, Jana R. Cox, Jasper R. F. W. Leuven, Jelmer Cleveringa, Marcel Taal, Matthew R. Hiatt, Willem Sonke, Kevin Verbeek, Bettina Speckmann, Maarten G. Kleinhans","doi":"10.1139/anc-2020-0006","DOIUrl":"10.1139/anc-2020-0006","url":null,"abstract":"<div><p>Shipping fairways in estuaries are continuously dredged to maintain access for large vessels to major ports. However, several estuaries worldwide show adverse side effects to dredging activities, in particular affecting morphology and ecologically valuable habitats. We used physical scale experiments, field assessments of the Western Scheldt estuary (the Netherlands), and morphodynamic model runs to analyse the effects of dredging and future stresses (climate and sediment management) on a multi-channel system and its ecologically valuable intertidal flats. All methods indicate that dredging and disposal strategies are unfavourable to long-term morphology because dredging creates and propagates the imbalance between shallow and deeper parts of the estuary, causing a loss of valuable connecting channels and fixation of the tidal flats and main channel positions, while countering adverse effects by disposal strategy has limited effectiveness. Changing the disposal strategy towards main channel scour disposal can be economically and ecologically beneficial for the preservation of the multi-channel system. Further channel deepening will accelerate the adverse side effects, whereas future sea-level rise may revive the multi-channel system.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"4 1","pages":"36 - 60"},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910203","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}

引用次数: 18

Correction: Modulation of sediment load recovery downstream of Three Gorges Dam in the Yangtze River 修正:长江三峡大坝下游泥沙负荷恢复的调节

Anthropocene Coasts Pub Date : 2023-03-20 DOI: 10.1007/s44218-023-00021-x

Chunyan Zhu, Yuning Zhang, D. V. van Maren, W. Xie, Leicheng Guo, Xianye Wang, Qing He

引用次数: 0

Geochemistry, spatial distribution, and sources of trace element pollution in the surface sediments of Port Hacking, southern Sydney, Australia 澳大利亚悉尼南部哈金港表层沉积物中微量元素污染的地球化学、空间分布和来源

Anthropocene Coasts Pub Date : 2023-03-20 DOI: 10.1139/anc-2020-0005

Yasir M. Alyazichi, Amin K. Qasim, Brian G. Jones, Errol McLean, Jindy Murad, Ahmed Aljawi

引用次数: 3

The status and future of tidal marshes in New Jersey faced with sea level rise 面对海平面上升，新泽西州潮汐沼泽的现状和未来

Anthropocene Coasts Pub Date : 2023-03-20 DOI: 10.1139/anc-2020-0020

Judith S. Weis, Elizabeth Burke Watson, Beth Ravit, Charles Harman, Metthea Yepsen

{"title":"The status and future of tidal marshes in New Jersey faced with sea level rise","authors":"Judith S. Weis, Elizabeth Burke Watson, Beth Ravit, Charles Harman, Metthea Yepsen","doi":"10.1139/anc-2020-0020","DOIUrl":"10.1139/anc-2020-0020","url":null,"abstract":"<div><p>Salt marshes are key coastal ecosystems that provide habitats for wildlife, including invertebrates, fishes, and birds. They provide ecosystem services such as protection from storm surges and waves, attenuation of flooding, sequestration of pollutants (e.g., blue carbon), and nutrient removal. They are currently under great threat from sea level rise (SLR). We collected information about trends in the horizontal extent (acreage) of New Jersey salt marshes and recent elevation changes compared with the current local rate of SLR in New Jersey, which is between 5 and 6 mm year<sup>−1</sup>. We found pervasive, although variable, rates of marsh loss that resulted from both anthropogenic disturbance as well as edge erosion and interior ponding expected from SLR. Elevation trends suggest that the current rates of SLR exceed most marsh elevation gains, although some <i>Phragmites</i>-dominated marshes keep pace with SLR. Four potential remedies to address current coastal trends of marsh loss were described in the context of New Jersey’s regulatory and management environment: protection of marsh inland migration pathways, altered management of <i>Phragmites</i>, thin layer sediment placement, and living shoreline installations. Proactive steps are necessary if coastal wetland ecosystems are to be maintained over the next few decades.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"4 1","pages":"168 - 192"},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910199","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}

引用次数: 11

Impacts of the Qingcaosha Reservoir on saltwater intrusion in the Changjiang Estuary 青草沙水库对长江口海水入侵的影响

Anthropocene Coasts Pub Date : 2023-03-20 DOI: 10.1139/anc-2020-0015

Zhangliang Ding, Jianrong Zhu, Hanghang Lyu

{"title":"Impacts of the Qingcaosha Reservoir on saltwater intrusion in the Changjiang Estuary","authors":"Zhangliang Ding, Jianrong Zhu, Hanghang Lyu","doi":"10.1139/anc-2020-0015","DOIUrl":"10.1139/anc-2020-0015","url":null,"abstract":"<div><p>The massive Qingcaosha Reservoir (QCSR) is located in the Changjiang Estuary along the northwest coast of Changxing Island. The reservoir significantly narrowed the upper reaches of the North Channel and deepened the channel near the reservoir. These topographical changes inevitably influenced hydrodynamic processes and saltwater intrusion in the estuary. A well-validated model was employed to investigate the influence of the QCSR on saltwater intrusion in the Changjiang Estuary. The model results showed that the narrowed upper reaches of the North Channel decreased the water diversion ratio and thus increased salinity in the North Channel. During the moderate tide after neap tide, the salinity decreased at the water intake of the QCSR because saltwater intrusion was obstructed at flood slack at the surface, while the salinity increase during the moderate tide after spring tide was mainly due to the intensified saltwater intrusion during spring tide. The deepening of the channel near the QCSR resulted in an increased water diversion ratio, and the salinity in the Eastern Chongming Shoal decreased by more than 0.5 psu during spring tide; however, the saltwater intrusion was enhanced due to the strengthened baroclinic force, which is proportional to the water depth. During neap tide, the salinity in the entire North Channel decreased because of a 1.4% increase in the water diversion ratio of the North Channel and the relatively weak tide.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"4 1","pages":"17 - 35"},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910206","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}

引用次数: 2

Prototyping a collaborative data curation service for coastal science 沿海科学协同数据管理服务原型

Anthropocene Coasts Pub Date : 2023-03-20 DOI: 10.1139/anc-2021-0002

Evan B. Goldstein, Anna E. Braswell, Caitlin M. McShane

引用次数: 1

Learning from experience: what the emerging global marine assessment community can learn from the social processes of other global environmental assessments 从经验中学习：新兴的全球海洋评估界可以从其他全球环境评估的社会进程中学到什么

Anthropocene Coasts Pub Date : 2023-03-20 DOI: 10.1139/anc-2020-0018

Kyle Fawkes, Sebastian Ferse, Anja Scheffers, Valerie Cummins

{"title":"Learning from experience: what the emerging global marine assessment community can learn from the social processes of other global environmental assessments","authors":"Kyle Fawkes, Sebastian Ferse, Anja Scheffers, Valerie Cummins","doi":"10.1139/anc-2020-0018","DOIUrl":"10.1139/anc-2020-0018","url":null,"abstract":"<div><p>In recent decades, international assessments of the ocean have evolved from specialized, technical evaluations of the state of the marine environment to more integrated and thematically extensive science-policy platforms. As assessment programmes such as the UN Regular Process blossom on the global stage and subsume responsibility for tracking progress on sustainable development, there is a need to consider how their processes wield influence and effectively translate knowledge into action. In the present paper, we undertake a comprehensive review of the literature on global environmental assessments (GEAs) and extract key principles that can be applied to global assessments of the marine environment. We were particularly inspired to identify how social processes could be arranged to best distill, communicate, and produce actionable knowledge. While we look to the advice of experts in the literature, we highlight specific examples from the Intergovernmental Panel on Climate Change (IPCC), Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES), and the Global Environment Outlook (GEO). From this review, knowledge coproduction, multilevel collaboration, and futures thinking emerged as the dominant principles of influential and action-oriented assessments. We conclude the paper by contextualizing how these principles may be operationalized for Global Marine Assessments in the future.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"4 1","pages":"87 - 114"},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910102","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}

引用次数: 2