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61,005 resultsShowing papers similar to Integrating land cover, point source pollution, and watershed hydrologic processes data to understand the distribution of microplastics in riverbed sediments
ClearAbundance, 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.
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.
Influential factors on microplastics occurrence in river sediments
A Bayesian network analysis of river sediment data found that microplastic type is more strongly influenced by catchment land use and population than by sediment particle size, while microplastic concentration showed a positive relationship with clay content. The study improves understanding of which landscape factors drive microplastic accumulation in river sediments.
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.
Population density and agricultural land cover influence microplastic concentrations in river sediments
Researchers measured microplastic concentrations in river sediments across nine Mid-Atlantic US watersheds and compared findings from 18 countries, finding no consistent longitudinal trend from headwaters to downstream reaches, but identifying population density and agricultural land cover as significant positive predictors of MP accumulation at a global scale.
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.
Microplastic distribution in a meandering river bed and its sedimentary predictors
Researchers investigated microplastic distribution patterns within a meandering riverbed and identified sedimentary predictors of microplastic accumulation, advancing understanding of within-channel spatial variability that affects large-scale pollution quantification. The study found that specific geomorphological features of meandering channels are strong predictors of local microplastic hotspots in riverbed sediments.
Microplastic distribution and their abundance along rivers are determined by land uses and sediment granulometry
Researchers studied two river watersheds and found that microplastics were widespread in both water and sediment, with concentrations in water rising alongside increased urban land use. Interestingly, microplastics trapped in sediment were more influenced by the grain size of the riverbed than by human activity. The findings suggest that both human factors and natural river characteristics work together to shape where microplastics end up in freshwater systems.
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.
Hydro-geomorphological features govern the distribution, storage, and transport processes of riverbed microplastics
This study examined how river channel shape, water flow, and sediment dynamics control where microplastics accumulate, travel, and are stored in riverbeds. Identifying these hydro-geomorphological drivers is important for predicting microplastic transport to downstream ecosystems and the ocean.
Hydro-geomorphological features govern the distribution, storage, and transport processes of riverbed microplastics
This study examined how river channel shape, water flow, and sediment dynamics control where microplastics accumulate, travel, and are stored in riverbeds. Identifying these hydro-geomorphological drivers is important for predicting microplastic transport to downstream ecosystems and the ocean.
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.
Microplastic fluxes among environmental compartments in an urban watershed
Researchers characterised microplastic sourcing and transport across atmosphere, water, sediment, and biota in the Deer Creek urban watershed near St. Louis, Missouri, sampling monthly at 10 sites over a full year and capturing flood events and weekly atmospheric deposition. Results showed that at baseflow, approximately 80% of microplastics were retained within the watershed, with floods representing major mobilisation events.
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.
Identifying Environmental Factors Influencing the Concentration, Fluxes and Spatial Distribution of Microplastic Pollution in an Urban River: A Case Study of the Klip River, South Africa
Environmental factors such as precipitation, temperature, and land cover were analyzed to identify which variables most strongly control microplastic concentrations in a study ecosystem. Pinpointing these drivers helps predict spatial and seasonal patterns of microplastic pollution for monitoring and management purposes.
Relative contributions of different local sources to riverborne microplastic in a mixed landuse area within a tropical catchment
Researchers quantified the relative contributions of different land-use sources to riverborne microplastics in a tropical catchment, providing data to help prioritize pollution reduction measures for protecting human and ecological health.
Microplastic fluxes among environmental compartments in an urban watershed
Researchers characterized microplastic sourcing and transport within the Deer Creek urban watershed near St. Louis, Missouri by sampling atmosphere, water, sediment, and bivalves monthly across 10 sites from November 2021 to October 2022, with additional flood and atmospheric deposition samples. They found that microplastics partition dynamically among watershed compartments depending on season and flow conditions, with floods playing a significant role in redistributing microplastic loads.
Mud and organic content are strongly correlated with microplastic contamination in a meandering riverbed
Researchers found that microplastic concentration in river sediments is strongly correlated with mud and organic content, with riverbank areas showing concentrations about ten times higher than the main channel. The study suggests that sediment composition and river flow dynamics play a key role in where microplastics accumulate within riverbeds.
Effects of anthropogenic discharge and hydraulic deposition on the distribution and accumulation of microplastics in surface sediments of a typical seagoing river: The Haihe River
Researchers used a generalised additive model to quantify the effects of anthropogenic discharge and hydraulic deposition on microplastic distribution in surface sediments of the Haihe River in northern China, finding high abundances of 4,980 items per kg dry weight dominated by small polyethylene particles. The model revealed that multiple factors including discharge locations and river hydraulics together determine microplastic accumulation hotspots in seagoing rivers.
Modelling land use influence on polymer-specific microplastics abundance and transportation from terrestrial to aquatic environments
Researchers developed a model to understand how land use patterns influence the abundance and transport of specific microplastic polymers from land into waterways. The study found that different land uses contribute distinct polymer types to the environment, providing evidence that targeted land management strategies could help reduce microplastic pollution in aquatic systems.
Microplastic distribution and characteristics across a large river basin: Insights from the Neuse River in North Carolina, USA
Researchers characterized microplastic distribution across the Neuse River Basin in North Carolina, finding microplastics in both water and sediment at all sampling locations, with concentrations influenced by land use and proximity to urban areas.
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.
Modeling spatiotemporal patterns of microplastic pollution in the lupit river using multilinear regression
Researchers modelled spatiotemporal patterns of microplastic pollution in the Lupit River using multiple linear regression with four predictors — population, seasonality, macroplastic frequency, and volumetric flow rate — finding widespread contamination across rural, residential, informal settlement, and commercial zones.
Prevailing impacts of river management on microplastic transport in contrasting US streams: Rethinking global microplastic flux estimations
Researchers compared microplastic transport in managed versus unmanaged US streams, finding that river management practices like channelization and damming significantly alter MP distribution patterns, suggesting global microplastic budgets need to account for river infrastructure.