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61,005 resultsShowing papers similar to A numerical model of microplastic erosion, transport, and deposition for fluvial systems
ClearA 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.
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.
Reply to reviewer comments on egusphere-2024-2788
Researchers developed a reduced-complexity model of microplastic erosion, transport, and deposition in river systems based on sediment transport methods, applying it to the Tet River in France and finding that the model accurately captures observed microplastic flux at the outlet when assuming 1-10 ppm volume concentration of microplastic in the top 0.5 m of soil with 300 µm grain size particles settling at approximately 10^-4 m/sec.
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.
Comment on egusphere-2024-2788
Researchers developed a reduced-complexity model of microplastic erosion, transport, and deposition in river systems, building on established sediment transport methods to explore how fluvial processes trap and store microplastics as they move from terrestrial sources toward the marine environment, finding that rivers may represent an important global reservoir of microplastic pollution.
Rivers as Conduits: A Comprehensive Model of Microplastic Fate and Transport
This study developed a comprehensive model of microplastic fate and transport in rivers, integrating processes of erosion, resuspension, sedimentation, and burial to simulate how microplastics move through river networks toward the ocean.
Model-based analysis of erosion-induced microplastic delivery from arable land to the stream network of a mesoscale catchment
Researchers developed the first catchment-scale model estimating how much microplastic is transported from farmland soils into stream networks through soil erosion. The study found that erosion can be a significant pathway for moving microplastics from agricultural fields into rivers, with implications for downstream water quality.
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.
Catchment-scale mechanistic predictions of microplastic transport and distribution across land and water
Researchers developed the first catchment-scale model successfully predicting microplastic transport from land to water, validated against field data, revealing how soil accumulation, runoff dynamics, and in-stream transport interact to determine where microplastics concentrate before reaching the ocean.
Simulating microplastics temporal dynamics, driving mechanisms and giving insights on sources
Researchers developed a watershed-scale model to simulate temporal dynamics of microplastic concentrations across air, soil, and water compartments, incorporating land use, hydrology, and seasonal variation. The model reproduced observed patterns in a French river catchment and identified agricultural soils as the dominant terrestrial source to receiving waters.
Transport processes of microplastic particles in the fluvial environment : erosion, transport and deposition
This thesis examines how microplastics are eroded, transported, and deposited in river systems, tracing their movement from land sources to the ocean. The research fills an important gap in understanding how rivers act as conduits for microplastic pollution and what processes determine where plastic particles accumulate in freshwater environments.
Model-based analysis of erosion-induced microplastic delivery from arable land to the stream network of a mesoscale catchment
Researchers applied a model-based analysis to quantify how erosion transports microplastics from agricultural land to the stream network of a mesoscale catchment, finding that surface runoff and soil erosion are significant pathways for microplastic delivery to inland waters.
Quantifying the impact of biofouling on microplastic transport: a modeling study
Researchers developed a modeling study to quantify how biofouling -- the attachment of microorganisms to microplastic surfaces -- affects microplastic transport in river systems by altering particle size, shape, density, and settling velocity, using quantified data to simulate transport dynamics.
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 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.
Modelling Microplastic Transport in River Systems Using the SWAT Hydrological Model
Researchers developed a novel modelling approach using the SWAT hydrological model to simulate microplastic transport through river basin systems, integrating hydrological and physical plastic properties. The model provides a tool for understanding the spatial and temporal dynamics of freshwater microplastic pollution to support mitigation planning.
Leveraging Sedimentary Process Insights to Enhance Understanding of Microplastic Deposition in Rivers
This review leverages insights from fluvial sediment transport research to improve understanding of how microplastics deposit and are buried in river networks, identifying knowledge gaps in water-sediment exchange processes and highlighting that current MP deposition estimates are biased by incomplete understanding of flow-sediment-particle interactions.
Estimating microplastic flows across rural-urban gradients in a French catchment
Researchers estimated microplastic flows across rural-urban gradients in a French catchment, examining how land use and urbanization influence the transport and distribution of microplastic particles through the watershed system.
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.
Plastic drift : Mapping the course of microplastic transport in turbulent riverine flows.
Researchers conducted laboratory experiments tracking the 3D trajectories of 24 negatively buoyant microplastic particles spanning a range of sizes, shapes, and densities in turbulent open channel flow, generating 720 trajectories to evaluate how well conventional sediment transport models apply to microplastics. Results revealed that the inherent variability in microplastic physical properties challenges direct application of sediment transport concepts to microplastic fate prediction in rivers.
A theoretical assessment of microplastic transport in river catchments and their retention by soils and river sediments
Researchers developed a mathematical model to theoretically assess how microplastics move through river systems, from agricultural soils where sewage sludge is applied to rivers and eventually the sea. The model predicted that 16 to 38 percent of heavier-than-water microplastics added to soils would remain stored locally, while smaller and lighter particles would be transported downstream. The study provides a framework for understanding microplastic pathways through landscapes, even as real-world monitoring data remain scarce.
Microplastic transport in European river networks
Researchers estimated the average annual load of microplastics transported to seas and oceans from 125 European catchments by coupling a mass balance model with a graph-theory river network model incorporating wastewater treatment plant effluents, surface runoff, and combined sewer overflows.
Limited role of discharge in global river plastic transport
A new modeling framework proposes that riverine plastic transport is driven primarily by plastic availability in the catchment rather than river discharge, challenging the assumption that high-flow events are the main driver of plastic export to the ocean.
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.