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61,005 resultsShowing papers similar to A novel Eulerian-Lagrangian numerical framework to investigate microplastic transport at surface water-sediment interfaces.
ClearAnalytical Modeling of Microplastic Transport in Rivers: Incorporating Sinking, Removal, and Multi-Phase Dynamics
Scientists developed better computer models to track how tiny plastic particles move through rivers on their way to the ocean. The new models show that many microplastics actually sink and get trapped in river sediments rather than flowing straight to the sea, which means we've been underestimating plastic pollution on river bottoms where fish and other wildlife live. This matters because it helps us better understand where microplastics accumulate in the environment and could eventually enter our food chain through seafood and drinking water.
A Lagrangian Model for Microplastics Transport in Rivers
Researchers developed a Lagrangian computational model to simulate how microplastics are transported through river systems, accounting for particle buoyancy, turbulence, and settling behavior. The model provides a tool for predicting microplastic fate and accumulation in freshwater environments.
Modelling the Fate of Microplastics in river bed sediments.
Researchers modeled the fate of microplastics deposited in river bed sediments, examining how hydrological conditions influence their distribution, burial, and potential for downstream transport. The models revealed that river bed sediments act as significant long-term reservoirs for microplastic pollution.
A numerical model of microplastic transport for fluvial systems
Researchers developed a reduced-complexity numerical model of microplastic erosion, transport, and deposition in fluvial systems, applying it to the river Têt in France and finding that a large proportion of microplastics become entrained in river sediments before reaching the ocean.
Modified Stochastic Model for Settling and Rising Microplastic Transport in Open Channel Flows
Scientists created a new computer model to better predict how tiny plastic particles move through rivers and streams. Unlike previous models that assumed all particles sink like dirt and sand, this new model accounts for the fact that some microplastics float upward because they're lighter than water. This better understanding of where microplastics end up in waterways could help protect drinking water sources and reduce human exposure to plastic pollution.
Longitudinal and Vertical Transport of Microplastic Within Sediment in Rivers and Transitional Water Environments
Researchers investigated the longitudinal and vertical transport of microplastics within sediments in rivers and transitional water environments, developing models to quantify how sediment presence affects microplastic mobility and their transport toward coastal areas.
Modeling microplastic dynamics in riverine systems: fate and transport analysis
Researchers developed a computer model to simulate how microplastics travel through river systems, accounting for how they enter from human activities and how they settle, resuspend, and deposit along riverbanks. The model was applied to the Tame River in the UK using four different scenarios based on plastic particle types like fibers, fragments, and pellets. The study provides a tool for predicting where microplastics accumulate in rivers, which could help target cleanup and monitoring efforts.
Bedload transport rates of microplastics on natural sediments under open channel flow: The role of exposure in acceleration
Researchers developed a new model for predicting how microplastics are transported as bedload in rivers, combining computational fluid dynamics with laboratory experiments. They found that exposed microplastics on the sediment surface move at higher transport rates than natural sediment particles of similar size, potentially spreading contamination over wider areas. The model provides a practical tool for engineers assessing how microplastic pollution disperses through waterway systems.
Modelling the Fate of Microplastics in river bed sediments.
Researchers modeled microplastic transport, deposition, and burial in river bed sediments under varying hydrological conditions. River bed sediments were found to act as long-term reservoirs for microplastics, with periodic high-flow events temporarily resuspending and redistributing particles.
A numerical model of microplastic erosion, transport, and deposition for fluvial systems
Researchers developed a numerical model of microplastic erosion, transport, and deposition in river systems, finding that rivers act as temporary sinks trapping significant fractions of MPs before they reach the ocean, with implications for estimating marine MP loading from terrestrial sources.
Making waves: Unraveling microplastic deposition in rivers through the lens of sedimentary processes
Researchers examined how sedimentary processes in rivers control where microplastics are deposited and how long they remain buried. They reviewed existing work on water-sediment exchange of microplastic particles and identified key gaps in understanding deposition dynamics. The study highlights that rivers serve as major pathways for transporting microplastics from land to oceans, and that sediment processes play a critical role in determining their fate.
Geometry-Driven Prediction of Microplastic Transport in Saturated Sediments: Fast and Memory-Efficient Pore-Scale Modeling
Scientists developed a new computer model that can predict how fast tiny plastic particles move through soil and sediment when water flows through them. This matters because microplastics can carry harmful chemicals like pesticides and heavy metals as they travel underground, potentially contaminating drinking water sources and groundwater. The model helps researchers understand where these plastic pollutants might end up and how quickly they could reach water supplies that people depend on.
Dispersal and transport of microplastic particles under different flow conditions in riverine ecosystem
Researchers developed a particle-tracking model combined with hydrodynamic simulation to study how microplastics travel through river systems under different water flow conditions. They found that flow speed, turbulence, and river channel features significantly influence where microplastics accumulate and how far they travel. The study provides a useful tool for predicting microplastic transport patterns and identifying pollution hotspots in river ecosystems.
Modeling impacts of river hydrodynamics on fate and transport of microplastics in riverine environments
Researchers built a computer model to simulate how microplastics travel and transform in river systems, accounting for particle aggregation and breakage driven by water flow. They found that microplastics clump together significantly in the early stages after entering a river, which changes the size distribution of particles flowing downstream. The study suggests that river conditions play a major role in determining what size and form of microplastics eventually reach the ocean.
Assessing the Behavior of Microplastics in Fluvial Systems: Infiltration and Retention Dynamics in Streambed Sediments
Scientists used laboratory river-bed simulations to study how microplastics move from surface water down into streambed sediments. Smaller particles (1 micrometer) penetrated deeper into the sediment than larger ones, and higher water flow pushed more particles downward. This research helps explain how microplastics accumulate in river beds, which serve as both drinking water sources and habitats for aquatic organisms.
The transport behaviour of microplastics in longitudinal mixing and hyporheic exchange under varied flow conditions
Researchers studied how microplastics move through river systems, examining both downstream transport and how particles interact with riverbeds through hyporheic exchange. Understanding these transport behaviors helps predict where microplastics accumulate in river sediments.
Polymer-specific transfer and retention of microplastics at the river–sediment–groundwater interface
Scientists studied how tiny plastic particles move from rivers into underground water that could become drinking water. They found that different types of plastics behave differently - some float and stay in rivers, while heavier plastics like those from bottles and pipes sink into riverbeds and can travel into groundwater supplies. This research is important because it helps us understand how microplastics might contaminate the underground water sources we rely on for drinking water.
Exploring the Sensitivity of Microplastic Accumulation Zones in Rivers Using High-Performance Particle Transport Modelling
Researchers applied high-performance particle transport modelling to explore the sensitivity of microplastic accumulation zones in rivers, identifying key hydrodynamic factors that govern where microplastics concentrate. The modelling approach provides a tool for predicting hotspot areas of microplastic deposition in fluvial environments.
Microplastic Pathways: Investigating Vertical and Horizontal Movement from Riverine Environments to Oceans
Researchers investigated the vertical and horizontal movement of microplastics in riverine systems en route to the ocean, examining how physical MP characteristics and hydrodynamic conditions govern whether particles settle near riverbeds or float at the surface, and how both gravity-driven and flow-driven transport contribute to their ultimate fate.
A numerical framework for modeling fate and transport of microplastics in inland and coastal waters
Researchers developed a new three-dimensional numerical framework called CaMPSim-3D for predicting microplastic fate and transport in rivers, lakes, estuaries, and coastal waters. The model couples Lagrangian particle tracking with hydrodynamic modeling to help identify pollution sources and accumulation hotspots, providing a tool for informed decision-making on microplastic prevention and cleanup.
A numerical model of microplastic erosion, transport, and deposition for fluvial systems
Researchers developed a reduced-complexity numerical model of microplastic erosion, transport, and deposition in fluvial systems, building on sediment transport methods and applying it to the Têt River in France where outlet flux monitoring data were available. The model found that matching observed fluxes required 1-10 ppm volume concentration of microplastic in the top 0.5 meters of soil, and predicted that a large proportion of microplastics become trapped in river sediments rather than reaching the ocean.
A numerical model of microplastic transport for fluvial systems in the land-sea continuum
A reduced-complexity numerical model was developed to simulate how microplastics erode, transport, and deposit through river systems, applied to the Têt River in France. The model successfully reproduced observed microplastic fluxes and reveals that rivers likely act as significant reservoirs trapping plastic on its journey from land sources to the ocean, suggesting current estimates of marine microplastic inputs may be underestimates.
Sediment-Water Interfaces as Traps and Sources of Microplastic Fragments and Microfibers─Insights from Stream Flume Experiments
Researchers used controlled stream flume experiments to study how microplastic fibers and fragments settle into riverbed sediments. They found that lower water flow speeds caused faster deposition, with the effect being strongest for fibers, and that traditional settling equations significantly underestimate how microplastics actually behave near the streambed. The findings improve our understanding of where and how microplastics accumulate in rivers.
The role of pumping and turnover in controlling microplastics entrapment and release in sand-bed rivers
Researchers developed a mathematical framework to model how microplastics are trapped and released in sand-bed rivers through the combined effects of water flow and dune migration. The study found that dune movement substantially alters how microplastics are transported and buried in river sediments, with a nonlinear interplay between shallow rapid exchange and deep burial that depends on dune size and flow conditions.