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Journal articles on the topic 'Coastal hydrodynamics; Sediment dynamics'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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1

Vinh, Vu Duy, та Nguyen Minh Hai. "SO SÁNH MỘT SỐ ĐẶC ĐIỂM ĐỘNG LỰC VÀ TRẦM TÍCH VEN BỜ CHÂU THỔ SÔNG HỒNG VÀ DƯƠNG TỬ". Tạp chí Khoa học và Công nghệ biển 19, № 4 (2020): 449–61. http://dx.doi.org/10.15625/1859-3097/19/4/12651.

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The Red river delta coastal area (Vietnam) and Yangtze river delta coastal area (China) not only play an important role in developmental process of each country but also show typical characteristics of hydrodynamics and sediment dynamics of estuaries and delta coastal areas. Based on previous studied results of hydro-sediment dynamics in two delta coastal zones that were published, this paper gives a comparison of hydrodynamics and sediment dynamics of the coastal zones of Red river and Yangtze river. The results showed that there are some similar features of these two regions such as riverine

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Horrillo-Caraballo, Jose M., Iain Fairley, Harshinie Karunarathna, Ian Masters, and Dominic E. Reeve. "MODELLING THE EFFECTS OF A TIDAL LAGOON ON THE MORPHOLOGY OF SWANSEA BAY, WALES, UK." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 52. http://dx.doi.org/10.9753/icce.v36.sediment.52.

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The Severn Estuary (west coast of UK) is a highly dynamic environment and thus understanding of sediment transport under both natural and man-made changes is vital to the sustainable use of the coastal area in this region. The area is likely to be the site of the worldâ€™s first tidal energy lagoon. The construction and operation of the lagoon will result in some localised changes to hydrodynamic processes, leading to some potential changes in sediment transport and depositional processes at identified receptors within Swansea Bay (Fairley et al., 2014, Fairley et al., 2016, TLSB, 2016). There

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Amoudry, Laurent, and Alejandro Souza. "INFLUENCE OF TURBULENCE CLOSURE ON ESTUARINE SEDIMENT DYNAMICS AND MORPHODYNAMICS." Coastal Engineering Proceedings 1, no. 32 (2011): 78. http://dx.doi.org/10.9753/icce.v32.sediment.78.

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Turbulence significantly impacts hydrodynamics, mixing and sediment dynamics in coastal environments. We employ a three-dimensional model, the Proudman Oceanographic Laboratory Coastal Ocean Modeling System (POLCOMS), to investigate the effects of implementing various turbulence closure schemes on sediment dynamics and morphodynamics. This model is applied to an idealized estuary, which is represented by a straight rectangular basin. A simple tidal flow is forced at one end and a constant river flow is imposed at the other. Most of the turbulence closure schemes employed are implemented via co

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Guimarães, André, Carlos Coelho, Fernando Veloso-Gomes, and Paulo A. Silva. "3D Physical Modeling of an Artificial Beach Nourishment: Laboratory Procedures and Nourishment Performance." Journal of Marine Science and Engineering 9, no. 6 (2021): 613. http://dx.doi.org/10.3390/jmse9060613.

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Beach nourishment represents a type of coastal defense intervention, keeping the beach as a natural coastal defense system. Altering the cross-shore profile geometry, due to the introduction of new sediments, induces a non-equilibrium situation regarding the local wave dynamics. This work aims to increase our knowledge concerning 3D movable bed physical modeling and beach nourishment impacts on the hydrodynamics, sediment transport, and morphodynamics. A set of experiments with an artificial beach nourishment movable bed model was prepared. Hydrodynamic, sediment transport, and morphological v

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Fitri, Arniza, Roslan Hashim, Soroush Abolfathi, and Khairul Nizam Abdul Maulud. "Dynamics of Sediment Transport and Erosion-Deposition Patterns in the Locality of a Detached Low-Crested Breakwater on a Cohesive Coast." Water 11, no. 8 (2019): 1721. http://dx.doi.org/10.3390/w11081721.

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Understanding the dynamics of sediment transport and erosion-deposition patterns in the locality of a coastal structure is vital to evaluating the performance of coastal structures and predicting the changes in coastal dynamics caused by a specific structure. The nearshore hydro-morphodynamic responses to coastal structures vary widely, as these responses are complex functions with numerous parameters, including structural design, sediment and wave dynamics, angle of approach, slope of the coast and the materials making up the beach and structures. This study investigated the sediment transpor

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Woszczyk, Michał, Wojciech Tylmann, Jan Jędrasik, et al. "Recent sedimentation dynamics in a shallow coastal lake (Lake Sarbsko, northern Poland): driving factors, processes and effects." Marine and Freshwater Research 65, no. 12 (2014): 1102. http://dx.doi.org/10.1071/mf13336.

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Despite the fact that sediment dynamics in shallow coastal lakes strongly influences lake water quality and is crucial for preserving good quality paleo-records from coastal zones, the depositional processes in coastal lakes have not been thoroughly recognised so far. The present study aims at investigating the relationship between lake water circulation and the distribution of surface sediments, identifying the postdepositional physical mechanisms affecting lake deposits, and estimating the intensity of sediment mixing in a coastal lake on the Baltic coast. Our approach includes analyses of s

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Liu, Ke, Qin Chen, and Kelin Hu. "THE IMPACT OF BARRIER ISLAND DEGRADATION ON HURRICANE-INDUCED SEDIMENT TRANSPORT." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 49. http://dx.doi.org/10.9753/icce.v36.papers.49.

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Hurricanes are recognized as a strong forcing in changing coastal morphology by redistributing sediments. Barrier islands protect estuaries from storm surge and severe waves and confine water and sediment discharge into estuaries during a hurricane event. In this study, we developed a three-dimensional, fully coupled storm surge, waves, and sediment transport model. The impacts of barrier islands degradation on hurricane hydrodynamics and sediment dynamics were evaluated by comparing a hypothetical model configuration for four major barrier islands in Terrebonne Bay and Barataria Bay against a

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Donatelli, Carmine, Xiaohe Zhang, Neil K. Ganju, Alfredo L. Aretxabaleta, Sergio Fagherazzi, and Nicoletta Leonardi. "A nonlinear relationship between marsh size and sediment trapping capacity compromises salt marshes’ stability." Geology 48, no. 10 (2020): 966–70. http://dx.doi.org/10.1130/g47131.1.

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Abstract Global assessments predict the impact of sea-level rise on salt marshes with present-day levels of sediment supply from rivers and the coastal ocean. However, these assessments do not consider that variations in marsh extent and the related reconfiguration of intertidal area affect local sediment dynamics, ultimately controlling the fate of the marshes themselves. We conducted a meta-analysis of six bays along the United States East Coast to show that a reduction in the current salt marsh area decreases the sediment availability in estuarine systems through changes in regional-scale h

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Bilal, Ahmed, Qiancheng Xie, and Yanyan Zhai. "Flow, Sediment, and Morpho-Dynamics of River Confluence in Tidal and Non-Tidal Environments." Journal of Marine Science and Engineering 8, no. 8 (2020): 591. http://dx.doi.org/10.3390/jmse8080591.

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River confluences are the key features of the drainage basins, as their hydrological, geomorphological, and ecological nature strongly influences the downstream river characteristics. The river reaches near the coastal zones, which also makes them under the influence of tidal currents in addition to their runoff. This causes a bi-directional flow and makes the study of confluences more interesting and complex in these areas. There is a reciprocal adjustment of flow, sediment, and morphology at a confluence, and its behaviors, differ greatly in tidal and non-tidal environments. Existing studies

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Spaulding, Malcolm, Tatsusaburo Isaji, and Katherine Jayko. "AN OIL SPILL MODEL SYSTEM FOR ARCTIC WATERS." International Oil Spill Conference Proceedings 1989, no. 1 (1989): 517–23. http://dx.doi.org/10.7901/2169-3358-1989-1-517.

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ABSTRACT An Arctic coastal sea model system, consisting of submodels for weather, hydrodynamics, waves, suspended sediment, ice cover, oil spill trajectory and fates, and ecosystem dynamics is presented. The structure and operation of each sub-model and linkages among the various model components are briefly described. The weather, hydrodynamic, ice, and oil spill fates components of the model system are applied to predict hydrodynamics and oil spill trajectories from selected release points in the Bering Sea. Trajectory data are analyzed to describe the percent of trajectories affecting land

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Borsje, Bas, Maurits Kruijt, Jebbe Van der Werf, Suzanne Hulscher, and Peter Herman. "MODELING BIOGEOMORPHOLOGICAL INTERACTIONS IN UNDERWATER NOURISHMENTS." Coastal Engineering Proceedings 1, no. 32 (2011): 104. http://dx.doi.org/10.9753/icce.v32.sediment.104.

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To prevent sandy coastlines from further erosion, nourishments are executed in which sand is usually put underwater at the foreshore. Waves and currents transport the sand on the beach and in this way stabilize the coastal profile. Little is known about the interactions of these so-called shoreface nourishments with the benthic populations inhabiting the coastal strip. Benthos is affected by the nourishments, but benthic populations could in turn affect the morphological evolution of the nourished coast. Monitoring has shown that the benthic community will mainly recovery after ca. 1 year. How

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Dissanayake, Pushpa, Marissa L. Yates, Serge Suanez, France Floc’h, and Knut Krämer. "Climate Change Impacts on Coastal Wave Dynamics at Vougot Beach, France." Journal of Marine Science and Engineering 9, no. 9 (2021): 1009. http://dx.doi.org/10.3390/jmse9091009.

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Wave dynamics contribute significantly to coastal hazards and were thus investigated at Vougot Beach by simulating both historical and projected future waves considering climate change impacts. The historical period included a major storm event. This period was projected to the future using three globally averaged sea level rise (SLR) scenarios for 2100, and combined SLR and wave climate scenarios for A1B, A2, and B1 emissions paths of the IPCC. The B1 wave climate predicts an increase in the occurrence of storm events. The simulated waves in all scenarios showed larger relative changes at the

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Athanasiou, Panagiotis, Wiebe De Boer, Pieter Koen Tonnon, et al. "LONG-TERM BAR DYNAMICS USING SATELLITE IMAGERY: A CASE STUDY AT ANMOK BEACH, SOUTH KOREA." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 91. http://dx.doi.org/10.9753/icce.v36.sediment.91.

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Nearshore sandbar patterns can affect the hydrodynamics and, as a result, the beach morphodynamics in the nearshore zone. Hence, spatial and temporal variability in the sandbars can influence beach accretion and erosion. Understanding the variability of the sandbar system can therefore be crucial for informed coastal zone management. So far, the methods to study sandbar dynamics mainly include datasets of video observations or occasional bathymetric surveys. However, at most locations around the world, these types of data are not or only scarcely available. In this paper we present an alternat

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Balke, T., T. J. Bouma, P. M. J. Herman, E. M. Horstman, C. Sudtongkong, and E. L. Webb. "Cross-shore gradients of physical disturbance in mangroves: implications for seedling establishment." Biogeosciences 10, no. 8 (2013): 5411–19. http://dx.doi.org/10.5194/bg-10-5411-2013.

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Abstract. Mangroves may grow in an active sedimentary environment and are therefore closely linked to physical coastal processes. Seedlings colonize dynamic tidal flats, after which mangroves have the potential to change their physical environment by attenuating hydrodynamic energy and trapping sediments. Disturbance from hydrodynamic energy of waves or currents and the resulting sediment dynamics appear to be a critical bottleneck for seedling establishment on tidal flats and at the forest fringe. However, knowledge about the mechanisms at the single plant level and the spatial pattern of dis

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Balke, T., T. J. Bouma, P. M. J. Herman, E. M. Horstman, C. Sudtongkong, and E. L. Webb. "Cross-shore gradients of physical disturbance in mangroves: implications for seedling establishment." Biogeosciences Discussions 10, no. 3 (2013): 5361–83. http://dx.doi.org/10.5194/bgd-10-5361-2013.

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Abstract. Mangroves grow in an active sedimentary environment and are therefore closely linked to physical coastal processes. Seedlings colonize dynamic tidal flats, after which mangroves have the potential to change their physical environment by attenuating hydrodynamic energy and trapping sediments. Disturbance from hydrodynamic energy of waves or currents and the resulting sediment dynamics appear to be a critical bottleneck for seedling establishment on tidal flats and at the forest fringe. However, knowledge about the mechanisms at the single plant level and the spatial pattern of disturb

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Xu, Kehui, P. Ansley Wren, and Yanxia Ma. "Tidal and Storm Impacts on Hydrodynamics and Sediment Dynamics in an Energetic Ebb Tidal Delta." Journal of Marine Science and Engineering 8, no. 10 (2020): 810. http://dx.doi.org/10.3390/jmse8100810.

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Bottom-mounted instrumentation was deployed at two sites on a large sandy shoal of an ebb tidal delta offshore of the Port Royal Sound of South Carolina of USA to collect hydrodynamics and sediment dynamics data. One site (“borrow site”) was 2 km offshore in a dredge pit for nearby beach nourishment and the other site (“reference site”) was 10 km offshore. In situ time-series data were collected during two periods after the dredging: 15 March–12 June (spring) and 18 August–18 November (fall) of 2012. Data at the reference site indicated active migrating bedforms from centimeters to decimeters

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Murtiaji, Cahyarsi, Mardi Wibowo, M. Ifrani, Buddin Al Hakim, and Gugum Gumbira. "KONSEP POLA SPASIAL PENGEMBANGAN KONEKTIVITAS DAN INFRASTRUKTUR PANTAI SERTA KAJIAN ASPEK DINAMIKA PANTAI UNTUK PENANGANAN PERMASALAHAN DI TELUK SEMARANG = CONCEPT OF SPATIAL PATTERN OF CONNECTIVITY AND INFRASTRUCTURE DEVELOPMENT AND STUDY OF ASPECTS OF COASTAL DYNAMICS OF THE BEACH FOR HANDLING PROBLEMS IN BAY OF SEMARANG." Majalah Ilmiah Pengkajian Industri 9, no. 1 (2015): 27–40. http://dx.doi.org/10.29122/mipi.v9i1.93.

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AbstractSemarang Gulf coast is currently experiencing rapid growth as a major economicÂ growth in Central Java. On the other hand, the current Gulf coast Semarang alsoÂ experiencing very complex issues, such as tidal flooding, land subsidence, asÂ well as damage due to coastal erosion and sedimentation. In accordance withÂ the duties, functions and competence as well as one of the BPDP BPPT roles,Â namely assessment and solutions in the field of technology, the Research CenterÂ for Coastal Dynamics (BPDP)- BPPT conduct a study to produce a concept ofÂ spatial patterns of connectivity and infra

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Pedan, G. S., S. V. Kadurin, K. P. Andreeva, and O. V. Dragomyretska. "LITHOLOGY AND HYDRODYNAMICS OF THE BLACK SEA ODESSA COAST UNDERWATER PART." Odesa National University Herald. Geography and Geology 26, no. 1(38) (2021): 220–32. http://dx.doi.org/10.18524/2303-9914.2021.1(38).234714.

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Problem Statement and Purpose. The results of lithological studies, including granulometric analysis, are needed to identify the conditions of sedimentation and distribution of rock fragments by size. They are an indicator of the sedimentation processes dynamic structure peculiarities. The study of the sediment regime is important for the development of measures related to the protection of shores from erosion. The aim of the work is to identify the lithological features of the bottom sediment types distribution on the protected section of the Odessa coast near Cape Maly Fontan. Data & Met

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Van Veelen, Thomas J., Harshinie Karunarathna, Tom P. Fairchild, William G. Bennett, John Griffin, and Dominic E. Reeve. "IMPROVING PREDICTIVE MODELLING OF COASTAL PROTECTION BY SALT MARSHES." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 95. http://dx.doi.org/10.9753/icce.v36.risk.95.

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Salt marshes are vegetated tidal wetlands, which can typically be found at sheltered coastal areas in moderate climate zones. Their potential as natural coastal protection by wave attenuation (MÃ¶ller et al, 2014), reduction of flood-surge propagation (Stark et al., 2016) and shoreline stabilization (Bouma et al, 2014) has been increasingly recognized among scientists and engineers, but it comes with risks. Our understanding of the biogeomorphological dynamics between salt marsh vegetation, hydrodynamics and sediment is limited, while these are essential to identify the protective value of mar

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Silva, P. D., P. V. Lisboa, and E. H. Fernandes. "Changes on the fine sediment dynamics after the Port of Rio Grande expansion." Advances in Geosciences 39 (January 14, 2015): 123–27. http://dx.doi.org/10.5194/adgeo-39-123-2015.

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Abstract. The Patos Lagoon estuary is a reservoir of fine sediments derived from the continental basin, which is exported to the coastal area through a narrow channel with average discharge of 2000 m3 s−1. The Port of Rio Grande is located in this connection channel between the Patos Lagoon and the Atlantic Ocean, and recently received investments from the Brazilian Government to expand its draft and modify the configuration of the breakwaters located at the mouth. The objective of this study is to investigate changes in the fine sediment dynamics in the estuarine and coastal region, after the

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Elias, Edwin P. L., and Ad J. F. van der Spek. "Dynamic preservation of Texel Inlet, the Netherlands: understanding the interaction of an ebb-tidal delta with its adjacent coast." Netherlands Journal of Geosciences 96, no. 4 (2017): 293–317. http://dx.doi.org/10.1017/njg.2017.34.

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AbstractTidal inlets and the associated ebb-tidal deltas can significantly impact the coastal sediment budget due to their ability to store or release large quantities of sand. Nearly 300 million m3(mcm) of sediments were eroded from Texel Inlet's ebb-tidal delta and the adjacent coasts following the closure of the Zuiderzee in 1932. This erosion continues even today as a net loss of 77 mcm was observed between 1986 and 2015. To compensate, over 30 mcm of sand has been placed on the adjacent coastlines since 1990, making maintenance of these beaches the most intensive of the entire Dutch coast

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Fernandes, Elisa, Pablo da Silva, Glauber Gonçalves, and Osmar Möller. "Dispersion Plumes in Open Ocean Disposal Sites of Dredged Sediment." Water 13, no. 6 (2021): 808. http://dx.doi.org/10.3390/w13060808.

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Management of estuarine systems under anthropogenic pressures related to port settlement and development requires thorough understanding about the long-term sediment dynamics in the area. In an era of growing shipping traffic and of ever larger ships; millions of tons of bottom sediments are dredged annually all over the world and the major question concerning dredging operations is not whether they should be done, because it is obvious that they are extremely important and necessary, but where the dredged sediments can be disposed of with the least possible ecological impact. The present stud

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Сухинов, А. И., А. Е. Чистяков, Е. А. Проценко, В. В. Сидорякина, and C. B. Проценко. "Parallel algorithms for solving the problem of coastal bottom relief dynamics." Numerical Methods and Programming (Vychislitel'nye Metody i Programmirovanie), no. 3 (July 12, 2020): 196–206. http://dx.doi.org/10.26089/nummet.v21r318.

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Предложена нестационарная 2D-модель транспорта донных отложений в прибрежной зоне мелководных водоемов, дополненная уравнениями Навье–Стокса, неразрывности и состояния водной среды. Дискретная модель транспорта наносов получена в результате аппроксимации соответствующей линеаризованной непрерывной модели. Поскольку задачи прогнозирования транспорта наносов требуют решения в реальном или ускоренном масштабах времени, на сетках, включающих 106–109 узлов, необходима разработка параллельных алгоритмов задач гидродинамики на системах с массовым параллелизмом. Представлены результаты работы созданно

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Alves Martins, Maria Virgínia, Márcia Andréia Da Silva Nunes, Marcio Inacio Alves, et al. "GEOCHEMICAL NORMALIZERS APPLIED TO THE STUDY OF THE PROVENANCE OF LITHOGENIC MATERIALS DEPOSITED AT THE ENTRANCE OF A COASTAL LAGOON. A CASE STUDY IN AVEIRO LAGOON (PORTUGAL) / NORMALIZADORES GEOQUÍMICOS APLICADOS AO ESTUDO DE PROVENIÊNCIA DE MATERIAIS LITOGÉNICOS DEPOSITADOS NA ENTRADA DE UMA LAGUNA COSTEIRA. UM ESTUDO DE CASO NA LAGUNA DE AVEIRO (PORTUGAL)." Journal of Sedimentary Environments 3, no. 2 (2018): 74–92. http://dx.doi.org/10.12957/jse.2018.34815.

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The use of geochemical normalizers has been applied in sedimentological studies in several study contexts, such as pollution, diagenetic and provenance assessment. Selected textural and mineralogical data of 137 surface sediment samples were compared by statistical analyses with geogenic elements concentrations normalized by the Al, Be, Ce, Fe, Fe+Al, Li, Rb and Sc aiming to identify the best normalizer to trace different sources of bottom sediments for the Aveiro Lagoon entrance (NW of Portugal). The study area is heterogenous in terms of hydrodynamics and sedimentary processes.The most commo

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Latapy, Alexa, Arnaud Héquette, Nicolas Pouvreau, Nicolas Weber, and Jean-Baptiste Robin-Chanteloup. "Mesoscale Morphological Changes of Nearshore Sand Banks since the Early 19th Century, and Their Influence on Coastal Dynamics, Northern France." Journal of Marine Science and Engineering 7, no. 3 (2019): 73. http://dx.doi.org/10.3390/jmse7030073.

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Tidal sand banks are common along the coast of northern France facing the North Sea, where they form linear shore-parallel or slightly oblique sand bodies from shallow coastal areas to depths of tens of meters. Hydrographic surveys have been carried out since the 1830s for mapping the seabed of the coastal zone. An analysis of the bathymetry evolution shows significant morphological changes have occurred across the shoreface since the early 19th century, largely due to cross-shore and longshore sand bank migration. Our results show that nearshore sand banks mainly migrated onshore and gained s

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Peng, Yun, Qian Yu, Yunwei Wang, Qingguang Zhu, and Ya Ping Wang. "Sensitivities of Bottom Stress Estimation to Sediment Stratification in a Tidal Coastal Bottom Boundary Layer." Journal of Marine Science and Engineering 8, no. 4 (2020): 256. http://dx.doi.org/10.3390/jmse8040256.

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The bottom friction velocity (U*), which controls seabed erosion and deposition, plays a critical role in sediment transport in tidal coastal bottom boundary layers. Approaches have been proposed to calculate U*, including the log profile (LP) estimation, the direct covariance (COV) measurement, and the turbulent kinetic energy (TKE) method. However, the LP method assumes homogeneous flow and the effects of stratification need to be taken into account. Here, field investigations of hydrodynamics and sediment dynamics were carried out on the Jiangsu Coast, China. Two acoustic Doppler velocimete

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Karagiannis, Nikolaos, Theophanis Karambas, and Christopher Koutitas. "NUMERICAL SIMULATION OF BERM AND DUNE EROSION DUE TO WAVE OVERTOPPING AND SEDIMENT OVERWASH USING OPENFOAM." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 29. http://dx.doi.org/10.9753/icce.v36.sediment.29.

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The present work follows authorsâ€™ previous works, published and presented at ICCE 2016 and Coastal Dynamics 2017 conferences (Karagiannis et al. 2016, 2017) and concerns the numerical simulation of berm and dune cross-shore profile evolution due to wave overtopping and sediment overwash through an innovative repetitive approach of coupling a hydrodynamic model, synthesized on the OpenFoam platform with a morphodynamic one, whose origin code is developed in FORTRAN by the authors. The hydrodynamic model is used for the wave propagation, while the morphodynamic one gets the results of the firs

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Gao, Guan Dong, Xiao Hua Wang, Dehai Song, et al. "Effects of Wave–Current Interactions on Suspended-Sediment Dynamics during Strong Wave Events in Jiaozhou Bay, Qingdao, China." Journal of Physical Oceanography 48, no. 5 (2018): 1053–78. http://dx.doi.org/10.1175/jpo-d-17-0259.1.

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AbstractWave–current interactions are crucial to suspended-sediment dynamics, but the roles of the associated physical mechanisms, the depth-dependent wave radiation stress, Stokes drift velocity, vertical transfer of wave-generated pressure transfer to the mean momentum equation (form drag), wave dissipation as a source term in the turbulence kinetic energy equation, and mean current advection and refraction of wave energy, have not yet been fully understood. Therefore, in this study, a computationally fast wave model developed by Mellor et al., a Finite Volume Coastal Ocean Model (FVCOM) hyd

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Cham, D. D., N. T. Son, N. Q. Minh, N. T. Hung, and N. Tien Thanh. "Hydrodynamic Condition Modeling along the North-Central Coast of Vietnam." Engineering, Technology & Applied Science Research 10, no. 3 (2020): 5648–54. http://dx.doi.org/10.48084/etasr.3506.

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An extremely dynamic morphology of the estuary is observed in the coastal regions of Vietnam under the governing processes of tides, waves, and river system flows. The primary target of this paper is to provide insight into the governing processes and morphological behavior of the NhatLe estuary, located in the north-central coast of Vietnam. Based on measured data from field surveys and satellite images combined with numerical model simulations of MIKE and Delft3D, the influences of seasonal river flow, tides, and wave dynamics on the sediment transport and morphological changes are fully exa

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Ondara, Koko, Ruzana Dhiauddin, Ulung Jantama Wisha, and Guntur Adhi Rahmawan. "Hydrodynamics Features and Coastal Vulnerability of Sayung Sub-District, Demak, Central Java, Indonesia." Journal of Geoscience, Engineering, Environment, and Technology 5, no. 1 (2020): 32–39. http://dx.doi.org/10.25299/jgeet.2020.5.1.3996.

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The Sayung sub-district is an abrasion area in Demak Regency that is mostly affected by sea level rise. The purpose of this research is to determine the features of hydrodynamics and coastal dynamics occurrence in the sub-district of Sayung. Collecting field data/information and modeling approach (tides, waves, currents, weather and coastline changes) have been done in Sayung, Demak. The wave height in the eastern coast is the highest. The significant wave height in 2004 was greater than March 2016 showing that in 2004 the wind energy transfers were larger than 2016. The refraction coefficient

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Piton, Violaine, Marine Herrmann, Florent Lyard, et al. "Sensitivity study on the main tidal constituents of the Gulf of Tonkin by using the frequency-domain tidal solver in T-UGOm." Geoscientific Model Development 13, no. 3 (2020): 1583–607. http://dx.doi.org/10.5194/gmd-13-1583-2020.

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Abstract. Consequences of tidal dynamics on hydro-sedimentary processes are a recurrent issue in estuarine and coastal processes studies, and accurate tidal solutions are a prerequisite for modeling sediment transport, especially in macro-tidal regions. The motivation for the study presented in this publication is to implement and optimize a model configuration that will satisfy this prerequisite in the frame of a larger objective in order to study the sediment dynamics and fate from the Red River Delta to the Gulf of Tonkin from a numerical hydrodynamical–sediment coupled model. Therefore, we

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Szymczak, Ewa, and Maria Rucińska. "Characteristics of morphodynamic conditions in the shallows of Puck Bay (southern Baltic Sea)." Oceanological and Hydrobiological Studies 50, no. 2 (2021): 220–31. http://dx.doi.org/10.2478/oandhs-2021-0019.

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Abstract Puck Bay is an unusual and thus interesting coastal water region, as it combines two different environments – a lagoon and the sea. They differ from each other in their seabed morphology, salinity, dynamics and water exchange. Their common elements are the extensive shallows and the vicinity of the Hel Peninsula. The shallows of Puck Bay have developed at various stages of its evolution, which began several thousand years ago and continues to this day. They have been shaped by varying morphogenetic factors resulting from changes in sea level and accompanying evolution phases of sand b

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Ryabchuk, Daria, Alexander Sergeev, Evgeny Burnashev, et al. "Coastal processes in the Russian Baltic (eastern Gulf of Finland and Kaliningrad area)." Quarterly Journal of Engineering Geology and Hydrogeology 54, no. 1 (2020): qjegh2020–036. http://dx.doi.org/10.1144/qjegh2020-036.

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The results of both onshore and offshore monitoring of the coastal zone in the Russian Baltic reveal the high intensity and recent acceleration of coastal dynamics caused by an increasing frequency of extreme hydrodynamic events and anthropogenic impacts on the diverse geology. Stable coasts dominate in the eastern Gulf of Finland, but the local rate of shoreline recession is up to 2.0 m a−1, reaching 5 m in one extreme storm event. The coastal zone of the Kaliningrad area is diverse. The western coast of the Sambia Peninsula is controlled by anthropogenic influences linked to the exploitation

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van Prooijen, Bram C., Marion F. S. Tissier, Floris P. de Wit, et al. "Measurements of hydrodynamics, sediment, morphology and benthos on Ameland ebb-tidal delta and lower shoreface." Earth System Science Data 12, no. 4 (2020): 2775–86. http://dx.doi.org/10.5194/essd-12-2775-2020.

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Abstract. A large-scale field campaign was carried out on the ebb-tidal delta (ETD) of Ameland Inlet, a basin of the Wadden Sea in the Netherlands, as well as on three transects along the Dutch lower shoreface. The data have been obtained over the years 2017–2018. The most intensive campaign at the ETD of Ameland Inlet was in September 2017. With this campaign, as part of KustGenese2.0 (Coastal Genesis 2.0) and SEAWAD, we aim to gain new knowledge on the processes driving sediment transport and benthic species distribution in such a dynamic environment. These new insights will ultimately help

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Meire, L., K. E. R. Soetaert, and F. J. R. Meysman. "Impact of global change on coastal oxygen dynamics and risk of hypoxia." Biogeosciences 10, no. 4 (2013): 2633–53. http://dx.doi.org/10.5194/bg-10-2633-2013.

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Abstract. Climate change and changing nutrient loadings are the two main aspects of global change that are linked to the increase in the prevalence of coastal hypoxia – the depletion of oxygen in the bottom waters of coastal areas. However, it remains uncertain how strongly these two drivers will each increase the risk of hypoxia over the next decades. Through model simulations we have investigated the relative influence of climate change and nutrient run-off on the bottom water oxygen dynamics in the Oyster Grounds, an area in the central North Sea experiencing summer stratification. Simulati

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Tahvildari, Navid, Ramin Familkhalili, and Gangfeng Ma. "NONHYDROSTATIC MODELING OF FLOW INTERACTIONS WITH HIGHLY FLEXIBLE VEGETATION." Coastal Engineering Proceedings, no. 36v (December 28, 2020): 59. http://dx.doi.org/10.9753/icce.v36v.waves.59.

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Improving our understanding of the interactions between gravity waves, currents, and coastal vegetation, which are nonlinear in nature, enables coastal engineers and managers to better estimate hydrodynamic forces on coastal infrastructure and utilize natural elements to mitigate their impacts. Aquatic vegetation is ubiquitous in coastal waters and it is well-known that flow loses energy over vegetation. Computational modeling of wave-vegetation interaction has been the subject of numerous recent studies and many improvements have been achieved in reducing limitations applied on wave and veget

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Breda, Angelo, Patricia M. Saco, Steven G. Sandi, Neil Saintilan, Gerardo Riccardi, and José F. Rodríguez. "Accretion, retreat and transgression of coastal wetlands experiencing sea-level rise." Hydrology and Earth System Sciences 25, no. 2 (2021): 769–86. http://dx.doi.org/10.5194/hess-25-769-2021.

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Abstract. The vulnerability of coastal wetlands to future sea-level rise (SLR) has been extensively studied in recent years, and models of coastal wetland evolution have been developed to assess and quantify the expected impacts. Coastal wetlands respond to SLR by vertical accretion and landward migration. Wetlands accrete due to their capacity to trap sediments and to incorporate dead leaves, branches, stems and roots into the soil, and they migrate driven by the preferred inundation conditions in terms of salinity and oxygen availability. Accretion and migration strongly interact, and they b

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Yoo, Jeseon, Sungwon Shin, Ki-Cheon Jun, and Jae-Seol Shim. "FIELD OBSERVATIONS AND MODEL PREDICTIONS OF WAVE TRANSFORMATION ON A MACRO-TIDAL BEACH, KOREA." Coastal Engineering Proceedings 1, no. 33 (2012): 43. http://dx.doi.org/10.9753/icce.v33.waves.43.

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Macro-tidal beach processes are influenced by complicated interactions of tide actions, coastal waves and morphological changes. Tidal cycles may be a primary forcing responsible for specific characteristics of hydrodynamic and morphological processes complicated on the intertidal flat in space and time. Macro-tidal sandy beaches are frequently developed in the west coast of Korea, experiencing seasonal variations of inter-tidal processes caused by a monsoonal climate in the Yellow Sea. Large winter waves tend to excite active beach morphological processes, inducing beach erosion and seaward-d

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Jiang, Long, Theo Gerkema, Déborah Idier, Aimée B. A. Slangen, and Karline Soetaert. "Effects of sea-level rise on tides and sediment dynamics in a Dutch tidal bay." Ocean Science 16, no. 2 (2020): 307–21. http://dx.doi.org/10.5194/os-16-307-2020.

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Abstract. Sea-level rise (SLR) not only increases the threat of coastal flooding, but may also change tidal regimes in estuaries and coastal bays. To investigate such nearshore tidal responses to SLR, a hydrodynamic model of the European Shelf is downscaled to a model of a Dutch coastal bay (the Oosterschelde, i.e., Eastern Scheldt) and forced by SLR scenarios ranging from 0 to 2 m. This way, the effect of SLR on tidal dynamics in the adjacent North Sea is taken into account as well. The model setup does not include meteorological forcing, gravitational circulation, and changes in bottom topog

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von Rönn, Gitta Ann, Knut Krämer, Markus Franz, Klaus Schwarzer, Hans-Christian Reimers, and Christian Winter. "Dynamics of Stone Habitats in Coastal Waters of the Southwestern Baltic Sea (Hohwacht Bay)." Geosciences 11, no. 4 (2021): 171. http://dx.doi.org/10.3390/geosciences11040171.

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Cobbles and boulders on the seafloor are of high ecological value in their function as habitats for a variety of benthic species, contributing to biodiversity and productivity in marine environments. We investigate the origin, physical shape, and structure of habitat-forming cobbles and boulders and reflect on their dynamics in coastal environments of the southwestern Baltic Sea. Stone habitats are not limited to lag deposits and cannot be sufficiently described as static environments, as different dynamic processes lead to changes within the physical habitat structure and create new habitats

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Raynal, Olivier, Frédéric Bouchette, Raphaël Certain, et al. "Holocene evolution of a Languedocian lagoonal environment controlled by inherited coastal morphology (northern Gulf of Lions, France)." Bulletin de la Société Géologique de France 181, no. 2 (2010): 211–24. http://dx.doi.org/10.2113/gssgfbull.181.2.211.

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Abstract The Maguelone shore extends along the northern coast of the Gulf of Lions margin, West of the Rhône delta and East of some high gradient coastal streams that have been providing most of the clastic sediments to the Gulf of Lions margin since the early Miocene. This 10 km wide area comprises an onshore small coastal watershed (15 km long) in low-lying carbonate hills, kilometer wide marshes, sandy beach and shoreface featuring local low sedimentation. Deposit architecture in such a coastal zone records dynamics of incised valley fill under the influence of rivers and wave/current hydr

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Zhu, Yafei, Andrew McCowan, and Perran L. M. Cook. "Effects of changes in nutrient loading and composition on hypoxia dynamics and internal nutrient cycling of a stratified coastal lagoon." Biogeosciences 14, no. 19 (2017): 4423–33. http://dx.doi.org/10.5194/bg-14-4423-2017.

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Abstract. The effects of changes in catchment nutrient loading and composition on the phytoplankton dynamics, development of hypoxia and internal nutrient dynamics in a stratified coastal lagoon system (the Gippsland Lakes) were investigated using a 3-D coupled hydrodynamic biogeochemical water quality model. The study showed that primary production was equally sensitive to changed dissolved inorganic and particulate organic nitrogen loads, highlighting the need for a better understanding of particulate organic matter bioavailability. Stratification and sediment carbon enrichment were the main

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White, Eric, Francesca Messina, Leland Moss, and Ehab Meselhe. "Salinity and Marine Mammal Dynamics in Barataria Basin: Historic Patterns and Modeled Diversion Scenarios." Water 10, no. 8 (2018): 1015. http://dx.doi.org/10.3390/w10081015.

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Understanding spatiotemporal patterns of salinity in Barataria Basin in coastal Louisiana is important to better understand and manage operations of existing and proposed freshwater and sediment diversions from the Mississippi River into the estuary. In this study, a comprehensive salinity dataset was compiled which covered the entire basin and included data from 1990 through 2015. The data were aggregated into daily mean salinity timeseries across Barataria Basin at a variety of spatial scales and used to analyze historic patterns. Simulations were conducted with two hydrodynamic models, the

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Van Oyen, Tomas, T. Suzuki, M. Zijlema, P. Rauwoens, and P. Troch. "DEVELOPMENT OF A FINITE-AMPLITUDE MORPHODYNAMIC MODEL FOR TIDAL SAND WAVES BASED ON SWASH." Coastal Engineering Proceedings 1, no. 33 (2012): 18. http://dx.doi.org/10.9753/icce.v33.posters.18.

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Tidal sand waves are prominent bed forms occurring in coastal seas characterized by non-cohesive sediment deposits and relatively strong tidal currents (0.3 - 1.0 m/s). These bed features have a crest-to-crest distance between 100 and 500 m and are oriented approximately orthogonal to the main direction of the tidal current. Typical amplitudes are of the order of 1 to 10 m. Due to the ability of the bed forms to migrate, tidal sand waves pose serious hazards to many coastal structures such as pipe lines, monopiles and shipping lanes. Insight in the dynamics of these bed forms therefore is cruc

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Ning, Wenxin, Jing Tang, and Helena L. Filipsson. "Long-term coastal openness variation and its impact on sediment grain-size distribution: a case study from the Baltic Sea." Earth Surface Dynamics 4, no. 4 (2016): 773–80. http://dx.doi.org/10.5194/esurf-4-773-2016.

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Abstract. We analysed the long-term variations in grain-size distribution in sediments from Gåsfjärden, a fjord-like inlet in the southwestern Baltic Sea, and explored potential drivers of the recorded changes in the sediment grain-size data. Over the last 5.4 thousand years (ky) in the study region, the relative sea level decreased 17 m, which was caused by isostatic land uplift. As a consequence, Gåsfjärden was transformed from an open coastal setting to a semi-closed inlet surrounded by numerous small islands on the seaward side. To quantitatively estimate the morphological changes in Gåsfj

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Asplund, Maria E., Martin Dahl, Rashid O. Ismail, et al. "Dynamics and fate of blue carbon in a mangrove–seagrass seascape: influence of landscape configuration and land-use change." Landscape Ecology 36, no. 5 (2021): 1489–509. http://dx.doi.org/10.1007/s10980-021-01216-8.

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Abstract Context Seagrass meadows act as efficient natural carbon sinks by sequestering atmospheric CO2 and through trapping of allochthonous organic material, thereby preserving organic carbon (Corg) in their sediments. Less understood is the influence of landscape configuration and transformation (land-use change) on carbon sequestration dynamics in coastal seascapes across the land–sea interface. Objectives We explored the influence of landscape configuration and degradation of adjacent mangroves on the dynamics and fate of Corg in seagrass habitats. Methods Through predictive modelling, we

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Kalra, Tarandeep S., Alfredo Aretxabaleta, Pranay Seshadri, Neil K. Ganju, and Alexis Beudin. "Sensitivity analysis of a coupled hydrodynamic-vegetation model using the effectively subsampled quadratures method (ESQM v5.2)." Geoscientific Model Development 10, no. 12 (2017): 4511–23. http://dx.doi.org/10.5194/gmd-10-4511-2017.

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Abstract. Coastal hydrodynamics can be greatly affected by the presence of submerged aquatic vegetation. The effect of vegetation has been incorporated into the Coupled Ocean–Atmosphere–Wave–Sediment Transport (COAWST) modeling system. The vegetation implementation includes the plant-induced three-dimensional drag, in-canopy wave-induced streaming, and the production of turbulent kinetic energy by the presence of vegetation. In this study, we evaluate the sensitivity of the flow and wave dynamics to vegetation parameters using Sobol' indices and a least squares polynomial approach referred to

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Mariotti, Giulio, and Shamim Murshid. "A 2D Tide-Averaged Model for the Long-Term Evolution of an Idealized Tidal Basin-Inlet-Delta System." Journal of Marine Science and Engineering 6, no. 4 (2018): 154. http://dx.doi.org/10.3390/jmse6040154.

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We present a model for the morphodynamics of tidal basin-inlet-delta systems at the centennial time scales. Tidal flow is calculated through a friction dominated model, with a semi-empirical correction to account for the advection of momentum. Transport of non-cohesive sediment (sand) is simulated through tidal dispersion, i.e., without explicitly resolving sediment advection. Sediment is also transported downslope through a bed elevation diffusion process. The model is compared to a high-resolution tide-resolving model (Delft3D) with good agreement for different hydrodynamic and sedimentary s

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Darsan, Junior. "Beach Morphological Dynamics at Cocos Bay (Manzanilla), Trinidad." Atlantic Geology 49 (November 15, 2013): 151. http://dx.doi.org/10.4138/atlgeol.2013.008.

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The Manzanillabeach in Cocos Bay, Trinidad is a barrier beach that protects the freshwaterNariva Swamp from the marine environment of the Atlantic. The Manzanilla beachis a very dynamic system owing to the open bay morphology, and its exposure tothe Atlantic Ocean. This study evaluated thespatial and temporal morphological and sedimentological characteristics,alongside hydrodynamic conditions operating on the beach. This studyinvestigates the beach’s response to tidal cycles diurnally, from spring toneap tide, and seasonally. Data from nine sites during the period December 2005to September 200

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Moshchenko, A. V., T. A. Belan, T. S. Lishavskaya, A. V. Sevastianov, and B. M. Borisov. "Longterm dynamics of prior pollutants concentration and total level of chemical contamination in the coastal areas at Vladivostok (Peter the Great Bay, Japan Sea)." Izvestiya TINRO 200, no. 2 (2020): 377–400. http://dx.doi.org/10.26428/1606-9919-2020-200-377-400.

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Contents of hydrocarbons, phenols, DDT and its metabolites, Cu, Pb, DDD/DDE and DDD+DDE/DDT ratios, and total level of chemical contamination (TPF index) in bottom sediments are traced for 16 stations in the coastal areas at Vladivostok in 1982−2018. The content of DDT, Cu and Pb, DDD/DDE ratio, and TPF had increased until the early 1990s and then had some stabilizing; the concentration of hydrocarbons was high and relatively stable until the middle 1990s, then dropped sharply and had new gradual growth since the early 2000s; the values of phenols concentration and (DDD+DDE)/DDT ratio were low

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