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61,005 resultsShowing papers similar to Study on the Impact of the Coastline Changes on Hydrodynamics in Xiangshan Bay
ClearTide-driven microplastics transport in an elongated semi-closed bay: A case study in Xiangshan Bay, China
Researchers combined field sampling and numerical tidal flow modeling to study microplastic transport in Xiangshan Bay, China, finding that tidal currents play a significant role in redistributing microplastics within this semi-closed coastal bay before they reach the open ocean.
Tidal responses of the semi-enclosed Bohai Sea to the long-term expansion of the Yellow River Delta
Despite its title referencing tidal responses and river delta expansion, this paper studies how the growth of the Yellow River Delta into the Bohai Sea has altered tidal patterns and resonance over the past 170 years — not microplastic pollution. It examines hydrodynamic modeling of coastal geomorphology and is not relevant to microplastics or human health.
Marine macro debris transport based on hydrodynamic model before and after reclamation in Jakarta Bay, Indonesia
This hydrodynamic modeling study predicted how marine debris would move in Jakarta Bay before and after planned land reclamation, finding that the new island configuration would alter debris transport patterns. The study is relevant to understanding how coastal development affects the distribution of plastic waste.
Transport mechanism of microplastics from a still water system to a dynamic estuarine system: A case study in Macao SAR
A study in Macao's Pearl River Estuary traced microplastics from still-water ecosystems into the dynamic estuarine system, revealing how hydrodynamic forces transport microplastics from inland reservoirs and ponds to coastal waters and ultimately the South China Sea.
Enhanced Transport Induced by Tropical Cyclone and River Discharge in Hangzhou Bay
Despite its title referencing transport and particle movement, this paper uses ocean circulation modeling to study how tropical cyclones and river discharge affect sediment transport in Hangzhou Bay, China — not microplastic pollution. It examines physical oceanography and storm impacts on particle movement and is not relevant to microplastics or human health.
Coastal ocean dynamics reduce the export of microplastics to the open ocean
Researchers used coupled numerical ocean circulation modeling to investigate the fate of microplastics in the East China Seas, finding that coastal dynamics — including upwelling, eddies, and shelf circulation — significantly reduce the export of microplastics from coastal zones to the open ocean. The study suggests that coastal retention processes may explain some of the discrepancy between estimated plastic inputs and open-ocean inventories.
Hydrology Modulates the Microplastics Composition and Transport Flux Across the River–Sea Interface in Zhanjiang Bay, China
Researchers measured how tides and seasonal rainfall affect the movement of microplastics through an estuary in southern China. They found that microplastic levels rose during low tides and dropped during high tides, with an estimated 1.6 billion particles flowing from river to sea each year. The findings provide a framework for understanding how water flow patterns drive microplastic transport into coastal environments.
Factors influencing the occurrence and distribution of microplastics in coastal sediments: From source to sink
Researchers sampled microplastics from sediments of two semi-enclosed bays and two coastal open zones in China, finding that proximity to human activity and reduced hydrodynamic energy were the primary drivers of higher microplastic abundance, with Jinghai Bay showing the greatest contamination due to its enclosed geometry and adjacent urban inputs.
Langmuir turbulence in a depth-varying coastal channel: Insights from large eddy simulations
Scientists studied how ocean waves create spinning water currents in coastal areas like bays and rivers, which help mix pollution and tiny plastic particles throughout the water. These wave-driven currents are much stronger than previously thought and significantly change how pollutants like microplastics spread through coastal waters where people swim, fish, and get drinking water. Understanding these mixing patterns is important for predicting where ocean pollution ends up and how it might affect human health.
Microplastic in three urban estuaries, China
Researchers surveyed three urban estuaries in China and found microplastics throughout, with concentrations and types reflecting the combined influence of surrounding city density, stormwater runoff, and tidal mixing.
Influence of estuarine physical processes in the transport of microplastics: a modelling study in the Gironde estuary
Researchers developed a hydrodynamic model to investigate how estuarine physical processes in the Gironde estuary influence the transport and distribution of microplastics, examining the role of tidal currents, salinity gradients, and fluvial discharge on particle fate. The modelling study provides insight into the mechanisms controlling microplastic accumulation and export in estuarine environments.
Can microplastics in offshore waters reflect plastic emissions from coastal regions?
Researchers found a significant negative correlation between coastal plastic discharge amounts and offshore microplastic abundance in Chinese waters, indicating that hydrodynamic conditions rather than proximity to pollution sources primarily determine microplastic distribution.
Identification of Microplastic Accumulation Zones in a Tidal River: A Case Study of the Fraser River, British Columbia, Canada
Researchers used a 3D hydrodynamic model coupled with a Lagrangian particle tracking model to simulate microplastic transport and identify accumulation zones in the tidal Fraser River in British Columbia. The modelling identified specific depositional hotspots linked to flow velocity gradients, providing a framework for targeted monitoring and remediation.
Accumulation of microplastics in a downstream area of a semi-enclosed bay: Implications of input from coastal currents
Researchers found that microplastic abundance in Haizhou Bay sediments ranged from 10.94 to 1,309 particles per kilogram, with intertidal zones containing more microplastics than supratidal areas and significant seasonal variation linked to coastal current dynamics. The findings highlight how semi-enclosed bay geometry concentrates microplastic accumulation downstream.
Modeling the fate of microplastics in the Sengkarang Estuary, Pekalongan City, Central Java, Indonesia
Researchers measured microplastic concentrations in water and sediment at the mouth of the Sengkarang River in Indonesia and built a hydrodynamic model to track how tidal currents, wind, and river flow distribute the particles. Microplastics were highest in coastal waters and mangrove sediments, with tides and currents driving horizontal transport and concentrating particles in biologically sensitive habitats. The modeling approach offers a practical framework for predicting where microplastics accumulate and informing pollution management in river-to-sea systems.
Coastal bays serve as reservoirs for microplastics from East China: insights from a mass budget model based on sedimentary findings
Researchers investigated sedimentary microplastics in three representative coastal bays of the Zhejiang Great Bay Area, China, and used a mass budget model to quantify sources and fluxes within each bay system. Riverine discharge accounted for 41.5%-96.7% of total microplastic input, with textile and fishing sources dominant in Hangzhou Bay, mariculture and tourism driving levels in Sanmen Bay, and packaging and agricultural sources prominent in Wenzhou Bay.
Dynamic signatures of microplastic distribution across the water column of Yangtze River Estuary: Complicated implication of tidal effects
Seasonal sampling of microplastic concentrations throughout the Yangtze River Estuary water column found tidal dynamics strongly influenced distribution, with researchers developing a model estimating 2154 tons per year of microplastic flux into the East China Sea and a tide impact factor index of 38-58%.
Sources and distribution of microplastics in the east China sea under a three-dimensional numerical modelling
Researchers used three-dimensional numerical modeling to investigate the sources and distribution of microplastics in the East China Sea, finding that riverine inputs from major Chinese rivers are the dominant source and that ocean currents drive accumulation patterns near the Zhoushan fishing ground.
Using hydrodynamic models to understand the impacts and risks of plastic pollution
This paper used hydrodynamic computer models to simulate the transport and accumulation of plastic pollution in estuarine and coastal environments. The approach helps predict where marine litter concentrates based on currents and geography, which is useful for targeting cleanup efforts and informing coastal management policies.
Ocean current modulation of the spatial distribution of microplastics in the surface sediments of the Beibu Gulf, China
Researchers conducted a large-scale survey of microplastics in seafloor sediments of the Beibu Gulf in China and found that ocean currents play a major role in where microplastics accumulate. The study provides important data on how water circulation patterns transport and concentrate microplastic pollution in coastal marine environments.
Trajectory of microplastic particles with 2-dimensional hydrodynamic modelling approach at Pekalongan waters, Central Java, Indonesia
Researchers used two-dimensional hydrodynamic modeling to track how microplastic particles move through the waters near Pekalongan, Central Java, Indonesia. They found that tidal currents and seasonal monsoon patterns significantly influence microplastic transport and accumulation near fishing grounds. The study provides a tool for predicting microplastic hotspots that could help guide marine debris management in the region.
Estuarine plastic dynamics: Analyzing export patterns from a typical semi-enclosed bay in Asia
Researchers mapped the distribution and export patterns of microplastics in Sanya Bay, a semi-enclosed bay in southern China. They found that low-density plastics like polypropylene accumulated near river mouths, while denser plastics settled near the bay's center, creating a dual-center distribution pattern. The study reveals how tidal dynamics and river discharge interact to determine where plastic pollution accumulates and exits these common coastal formations.
Impacts of changing ocean circulation on the distribution of marine microplastic litter
Researchers modelled the impact of changing ocean circulation on the distribution of marine microplastics, examining how projected shifts in current patterns may alter the accumulation zones and transport pathways of plastic particles measuring less than 5 mm.
Numerical simulation research of the transportation and distribution characteristics on sea surface of the microplastic released continuously for 12 years from China's coastal cities
Using ocean current modeling, this study simulated where microplastics released from Chinese coastal cities over 12 years actually end up. The majority (80%) wash back ashore or remain in nearby marginal seas, about 18% are carried into the Pacific via the Kuroshio Current, and a small fraction reaches Southeast Asia. The results show that proximity to source matters enormously for coastal microplastic accumulation and that China's coastal emissions create a regional, rather than purely global, pollution signature.