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20 resultsShowing papers similar to Comment on egusphere-2024-2788
ClearComment on egusphere-2024-2788
Researchers developed a reduced-complexity model to explore how microplastics are transported through fluvial systems from source to marine sink, investigating the potential for rivers to act as significant reservoirs of microplastic pollution. The study examines the trapping dynamics of microplastics within river systems, analogous to sediment transport, and assesses their global significance as microplastic stores.
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.
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.
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.
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.
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.
Comment on egusphere-2023-939
This comment paper proposes a framework for building river network models from geographic information system data to study environmental processes in rivers. Improved river modeling tools help predict how microplastics are transported and distributed through river networks to coastal ecosystems.
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.
Comment on egusphere-2023-882
This comment discusses a study estimating how much microplastic is transported from agricultural soils into rivers through erosion and surface runoff. The analysis highlights soil erosion as an important but often overlooked pathway by which microplastics move from land to freshwater systems.
River plastic transport and storage budget.
This global synthesis estimated the plastic transport and storage budget for rivers by measuring plastic in the water surface, water column, riverbanks, and floodplains — finding that far more plastic is stored within rivers than is transported to the ocean. The study challenges the assumption that rivers are primarily conduits and highlights them as major long-term plastic reservoirs.
On modeling the fate of microplastics along river networks
Researchers developed and applied a modeling framework to simulate the fate and transport of microplastics along river network systems, treating rivers as key conduits transferring land-based microplastic pollution to marine environments. The model accounted for particle ingestion risks to aquatic organisms and evaluated the long-term persistence and transport dynamics of microplastics across freshwater networks.
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.
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.
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.
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.
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.
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.
Macroplastic Storage and Remobilization in Rivers
Researchers developed a conceptual model of macroplastic debris transport through fluvial systems, dividing the pathway into input, transport, storage, remobilization, and output phases and hypothesizing that natural channel dynamics control whether river systems act as net sources or sinks of plastic pollution.
Modeling the transport of microplastics along river networks
Researchers built a mathematical model to predict how microplastics travel through river networks, combining water flow dynamics with estimates of human plastic inputs. They tested the model against real-world data from three river systems worldwide and found it reliably predicted microplastic concentrations. The tool could help identify pollution hotspots and guide cleanup priorities across entire river basins.