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61,005 resultsShowing papers similar to Estimating microplastic flows across rural-urban gradients in a French catchment
ClearEstimating microplastic flows across rural-urban gradients in a French catchment
Researchers estimated microplastic flows along rural-to-urban gradients within a French catchment, quantifying how land use transitions influence MP loading and transport dynamics in surface waters. The study provides spatially resolved flux estimates that reveal how urbanization amplifies microplastic contributions to downstream receiving environments.
Spatio and temporal dynamics of microplastic fluxes within the watercourses of a peri-urban watershed
Researchers tracked the spatiotemporal dynamics of microplastic fluxes within a river catchment over time, linking plastic transport patterns to land use activities. The study found that land use type is a key driver of when and how much microplastic enters and moves through watercourses.
The urban microplastic footprint: investigating the distribution and transport
Researchers investigated the distribution and transport of microplastics within an urban environment, mapping the 'urban microplastic footprint' to understand how city infrastructure and land use patterns drive the spatial distribution and downstream export of plastic particles to receiving water bodies.
Spatio and temporal dynamics of microplastic fluxes within the watercourses of a peri-urban watershed
Researchers tracked spatial and temporal microplastic flux dynamics in the watercourses of a small peri-urban catchment, examining how different land use types within the watershed contribute to plastic loading in connected streams. Land use strongly influenced microplastic flux, with urbanized and agricultural sub-catchments contributing proportionally more plastic particles to the waterway network.
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.
Urbanization and hydrological conditions drive the spatial and temporal variability of microplastic pollution in the Garonne River
Researchers quantified microplastic concentrations across 14 sites in the Garonne River catchment in France, finding that urbanization drives spatial variation while seasonal hydrology shapes temporal patterns—with higher concentrations and smaller particles in warm, low-flow periods—and polyethylene, polystyrene, and polypropylene dominating polymer composition.
Microplastic pollution in sophisticated urban river systems: Combined influence of land-use types and physicochemical characteristics
This study assessed microplastic pollution across an urban river network in China, finding that land-use type and water physicochemical properties jointly influence microplastic distribution, with industrial and residential areas contributing highest loads.
Microplastic contamination in an urban area: a case study in Greater Paris
Researchers investigated microplastic contamination across Greater Paris, finding that urban areas generate and accumulate substantial microplastic pollution through multiple pathways including stormwater, atmospheric deposition, and river transport.
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.
Microplastic pollution in streams spanning an urbanisation gradient
Researchers sampled microplastics in small streams across an urbanization gradient and found contamination at all sites, with concentrations comparable to those in larger rivers and lakes. Fragments and small particles between 63 and 500 micrometers were the most common forms detected. Surprisingly, catchment-scale factors like population density and stormwater overflows did not predict microplastic levels well, suggesting that local-scale sources may be more important for pollution in small streams.
Abundance, Distribution and Drivers of Microplastic Contaminant in Urban River Environments
Researchers surveyed microplastic distribution in urban river environments and identified key drivers of accumulation hotspots, finding that land use, hydrology, and infrastructure factors concentrated microplastics at predictable locations that could inform targeted management interventions.
Soil contamination by microplastics in a small French agricultural watershed
Researchers characterized microplastic contamination in agricultural soils across a small French watershed, examining how various farming practices influence microplastic sources, distribution, and fate in soil environments outside of previously studied regions like China.
Quantifying microplastic stocks and flows in the urban agglomeration based on the mass balance model and source-pathway-receptor framework: Revealing the role of pollution sources, weather patterns, and environmental management practices
Researchers developed a mass balance model using a source-pathway-receptor framework to quantify microplastic stocks and flows in an urban agglomeration, revealing how pollution sources, weather patterns, and environmental management practices collectively determine the transport of microplastics to receiving water bodies.
Microplastics and microfibers in urban runoff from a suburban catchment of Greater Paris
Researchers collected stormwater runoff samples from a suburban catchment in Greater Paris across multiple rain events and found significant concentrations of microplastics and microfibers, with concentrations varying substantially between events and correlating with rainfall intensity and catchment dry-weather duration.
Abundance, composition and fluxes of plastic debris and other macrolitter in urban runoff in a suburban catchment of Greater Paris
Researchers quantified plastic debris composition and fluxes in stormwater runoff from a suburban Paris catchment, finding plastics comprised over 60% of macrolitter and estimating that separate sewer systems in the greater Paris area discharge 8–33 tons of plastic debris into the environment annually, establishing urban stormwater as a significant but poorly studied pathway for plastic pollution.
Microplastic pollution differences in freshwater river according to stream order: Insights from spatial distribution, annual load, and ecological assessment
Researchers compared microplastic pollution levels in a freshwater river across different land-use zones, finding higher concentrations near urban and agricultural areas than in forested regions. Fiber-type microplastics were predominant across all sampling locations.
Quantifying microplastic fluvial flux from a coastal watershed—A microplastic rating curve approach
Researchers quantified the flux of microplastics transported by rivers to the coast from a single watershed, providing a mass balance for how much plastic a defined catchment exports. Such flux estimates are essential building blocks for calculating global land-to-ocean plastic budgets.
The influence of flow on the amount, retention and loss of plastic pollution in an urban river
Researchers sampled both microplastics and macroplastics at four sites along an urban river in Ontario, Canada during normal flow and storm conditions. The study found that storm events significantly influence plastic transport dynamics, with flow conditions affecting how much plastic pollution is retained in or flushed through urban river systems toward downstream water bodies.
Design of model microplastics to study their transport in urban waters
Researchers designed model microplastic particles with controlled physical properties to systematically study their transport behavior in urban water systems. The work provides a foundation for understanding how microplastic size, density, and shape influence fate and transport in stormwater and urban drainage networks.
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.
Transport dynamics of microplastics from land to sea: the role of particle properties and stream morphology.
Researchers measured how particle properties including size, density, and polymer type interact with stream morphology to determine microplastic transport distances in 15 streams. Both plastic characteristics and stream structure independently influenced how far microplastics travel before settling, with implications for estimating fluxes to the ocean.
Influence of drainage infrastructure and land use on microplastic contamination in urban watersheds
This field study compared how different types of urban stormwater infrastructure — surface drains versus piped outfalls — contribute to microplastic contamination in streams across two watersheds with contrasting land uses (agricultural/forested versus residential/commercial). Microplastic concentrations and types differed between drainage types and land uses, with developed areas contributing more plastic particles overall. The findings point to stormwater infrastructure design as a lever for reducing the flow of microplastics from cities into freshwater ecosystems.
Multidisciplinary analysis of microplastic dynamics: from sources to environmental fate in urban rivers during floods
Researchers conducted a multidisciplinary investigation of microplastic dynamics in urban rivers, combining flume experiments on riparian vegetation, polymer-specific quantification using PLE-Py-GC/MS, and a catchment-scale connectivity model to map land-to-river microplastic transport within the Arno basin.
Impact of land cover on microplastics accumulation in freshwater sediments
Researchers tracked microplastic accumulation in freshwater sediments across sites with different land cover types, examining temporal trends to understand how land use affects plastic discharge into waterways. Land cover type was a significant predictor of sediment microplastic concentration, with urbanized and agricultural catchments showing higher accumulation.