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61,005 resultsShowing papers similar to Spatial Persistence of Water Chemistry Patterns Across Flow Conditions in a Mesoscale Agricultural Catchment
ClearDynamics of microplastics in urban rivers under varying hydrological regimes
Monitoring of urban rivers showed that microplastic concentrations fluctuate significantly with varying hydrological conditions such as storm events and seasonal flow changes. Understanding these dynamics is essential for accurately characterizing the river microplastic load and its variability over time.
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.
A case study investigating temporal factors that influence microplastic concentration in streams under different treatment regimes
Microplastic concentrations in streams fluctuate significantly over time, influenced by rainfall events and seasonal factors, which can make single-sample studies misleading. The study emphasizes the need for repeated, time-series sampling to accurately assess microplastic pollution in rivers.
Transport of (Micro)plastic Within a River Cross-Section—Spatio-Temporal Variations and Loads
This study measured the transport of micro- and macroplastics across a river cross-section over time, revealing how spatial position in the river, flow conditions, and seasonal variation influence plastic distribution. The findings inform more accurate monitoring protocols for river plastic load assessment.
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.
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.
The role of biofilm and hydrodynamics on the fate of microplastic particles in rivers: an experimental study
Researchers conducted experimental flume studies to investigate how biofilm formation and hydrodynamic conditions jointly govern microplastic particle fate in rivers, examining why some urbanized and industrialized river reaches show no significant upstream-to-downstream increase in microplastic concentration despite theoretical inputs.
Understanding the spatio-temporal behaviour of riverine plastic transport and its significance for flux determination: insights from direct measurements in the Austrian Danube River
This study analyzed the spatio-temporal behavior of plastic transport in rivers, examining how flow conditions, catchment characteristics, and seasonal variation influence plastic flux and retention within river systems.
The plastic fingerprint: Temporal and spatial variability in Flanders' riverine plastic pollution
Researchers investigated spatial and temporal variability in riverine plastic pollution across Flanders, Belgium, examining how local pollution sources, rainfall, and wind influence the distribution of micro- and mesoplastics in rivers and developing a fingerprinting approach to characterize the heterogeneous 'microplastome'.
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 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.
The plastic fingerprint: Temporal and spatial variability in Flanders' riverine plastic pollution
Researchers conducted coordinated monitoring of micro- and mesoplastic pollution across multiple rivers in Flanders, Belgium, to characterise spatial and temporal variability in the 'plastic fingerprint' - the polymer composition, particle size, and morphology profile - as influenced by local pollution sources and environmental factors like rainfall and wind. The study found that the plastic fingerprint varied significantly across sites and over time, indicating that local sources and hydrological conditions strongly shape riverine plastic contamination patterns.
Spatial and temporal variability in in-stream microplastic loads can impact downstream plastic export
This study demonstrated that microplastic loads in streams show significant spatial and temporal variability driven by storm events and seasonal patterns, and that these dynamics can strongly influence the total plastic export from river systems to downstream waters.
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.
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.
Study of the influence of fluvial dynamics on the distribution and transport of microplastics.
Researchers studied how fluvial dynamics, including water flow, turbulence, and river morphology, influence microplastic distribution and transport in a river system. The study found that hydrological conditions strongly control where microplastics deposit and how they move through the watershed.
Effects of seasonal variation and resuspension on microplastics in river sediments
Researchers measured microplastic concentrations in river sediments across multiple seasons and examined the role of resuspension events, finding that MP levels varied significantly by season and that high-flow events released previously deposited particles, redistributing contamination downstream.
Influence of land use class and configuration on water-sediment partitioning of heavy metals
Researchers analyzed how land use patterns and population density influence the partitioning of heavy metals between river water and sediment, finding that agricultural land discharges the highest dissolved metal fractions and that fragmenting anthropogenic land into smaller patches reduces water-column metal pollution.
Unseen riverine risk: Spatio-temporal shifts of microplastic pollution and its bioavailability in freshwater fish within the Ikopa River urban system
This study tracked spatio-temporal shifts in microplastic pollution concentrations in a river system, linking concentration changes to seasonal flow dynamics and identifying hot spots of accumulation that pose elevated risk to aquatic biota.
Study of the influence of fluvial dynamics on the distribution and transport of microplastics.
Researchers studied how fluvial dynamics including flow velocity, turbulence, and river geomorphology influence the distribution and transport of microplastics in river systems. River hydrodynamics were found to be major determinants of where microplastics accumulate and how far they travel, with implications for predicting contamination patterns in river catchments.
Microplastic Chemostasis and Homogeneity During a Historic Flood on the Mississippi River
During a historic 2019 Mississippi River flood, researchers found that microplastic concentrations and composition in the water column stayed surprisingly stable across flood and normal-flow conditions, with fibers consistently dominating. This suggests that microplastics in large rivers behave differently than expected — flood events do not appear to dramatically flush or concentrate them — which challenges assumptions used in models estimating how much plastic rivers deliver to the ocean.
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.
Spatio-temporal distribution of microplastics in a Mediterranean river catchment: The importance of wastewater as an environmental pathway
Microplastic concentrations were mapped across a Mediterranean river catchment in central Spain over multiple seasons, finding that wastewater treatment plant effluents were the dominant point source and that storm events transiently increased concentrations in downstream reaches by mobilizing accumulated particles from river beds and floodplains.
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.