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61,005 resultsShowing papers similar to Toward a Harmonized Approach for Monitoring of Riverine Floating Macro Litter Inputs to the Marine Environment
ClearA Methodology to Characterize Riverine Macroplastic Emission Into the Ocean
This paper presents a standardized methodology for measuring and characterizing macroplastic emissions from rivers into the ocean, addressing a major data gap in global plastic budget estimates. Consistent measurement frameworks are essential for understanding how much plastic enters the ocean from land-based sources via rivers.
Evaluation of riverine macro- and mesoplastic monitoring approaches.
This review evaluated and compared existing monitoring approaches for riverine macro- and mesoplastics, identifying key methodological inconsistencies that limit cross-study comparisons and calling for standardization to improve understanding of plastic transport and accumulation in freshwater river systems.
Controlling Factors of Microplastic Riverine Flux and Implications for Reliable Monitoring Strategy
This review examines the controlling factors that determine microplastic flux from rivers to the sea, identifying hydrology, land use, river morphology, and sampling methodology as key variables, and arguing for standardized monitoring approaches to enable reliable riverine flux estimates.
An evaluation of the River-OSPAR method for quantifying macrolitter on Dutch riverbanks
This study evaluated the River-OSPAR method — a standardized litter monitoring protocol — for quantifying debris on Dutch riverbanks. Accurate monitoring methods are necessary to track plastic litter reduction efforts in river systems that ultimately transport litter to the ocean.
Knowledge about Microplastic in Mediterranean Tributary River Ecosystems: Lack of Data and Research Needs on Such a Crucial Marine Pollution Source
This review surveys the limited literature on microplastic pollution in freshwater rivers feeding the Mediterranean Sea, finding major gaps in data and inconsistent methods. The authors call for standardized monitoring protocols to better understand how rivers transport microplastics from land to the ocean.
Visual Observation to Detect Macroplastic Object in River: A Review of Current Knowledge
This review examines visual observation methods for detecting macroplastic objects in rivers, using a systematic approach to assess current research trends, methodologies, and future directions in riverine plastic monitoring. Researchers found that visual observation is a widely used and adaptable method for measuring plastic quantity, composition, and distribution, though standardization gaps limit cross-study comparisons and effective mitigation strategy design.
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.
Modelling floating riverine litter in the south-eastern Bay of Biscay: a regional distribution from a seasonal perspective
Researchers modeled the seasonal behavior of floating litter released by rivers into the south-eastern Bay of Biscay using riverine litter characterization data, surface drifters, high-frequency radar observations, and Lagrangian simulations, providing a regional seasonal distribution analysis of floating marine litter transport from riverine sources.
Floating Riverine Litter Flux to the White Sea: Seasonal Changes in Abundance and Composition
Researchers conducted the first assessment of floating macro litter entering the White Sea from two Arctic rivers, documenting seasonal changes in abundance and composition from May to November 2021 and establishing a baseline for litter flux in this understudied Arctic region.
On the quantity and composition of floating plastic debris entering and leaving the Tamar Estuary, Southwest England
Researchers estimated the quantity and composition of floating plastic entering and leaving the North Sea, using measurements and modeling to track how much plastic crosses the sea's boundaries through oceanic and atmospheric pathways.
A Field Guide for Monitoring Riverine Macroplastic Entrapment in Water Hyacinths
Researchers developed a field guide for monitoring macroplastic entrapment in water hyacinths in rivers, providing standardized methods to quantify how floating aquatic vegetation aggregates and transports plastic debris — an understudied pathway in river plastic budgets.
Rapid Assessment of Floating Macroplastic Transport in the Rhine
Researchers developed a rapid assessment methodology to quantify floating macroplastic transport in the Rhine River using visual counting from bridges combined with flow velocity data, demonstrating the feasibility of low-cost monitoring approaches for riverine plastic flux. The study contributes to better understanding of how rivers function as pathways delivering plastic pollution to the ocean.
A New Monitoring Strategy of Large Micro-, Meso- and Macro-Litter: A Case Study on Sandy Beaches of Baltic Lagoons and Estuaries
Researchers developed and applied a new litter monitoring methodology for large micro- (2-5 mm), meso- (5-25 mm), and macro-litter (greater than 25 mm) at 23 sandy beaches of three Baltic Sea inner-coastal lagoons and estuaries, using two 40 m2 polygons for macro-litter and two 1 m2 squares for smaller fractions. They found that litter densities varied between lagoons and depended on river output intensity and retention capacity, with plastic pieces and construction materials among the most common items, indicating these coastal water bodies serve as sinks for land-based litter.
Same but different: A framework to design and compare riverbank plastic monitoring strategies
Researchers proposed a standardized framework for designing and comparing riverbank plastic monitoring strategies, identifying four common elements shared across existing methods to facilitate harmonization of data collection. The framework aims to help scientists and practitioners balance research objectives against available resources, improving cross-study comparability of macroplastic litter data.
Methods for sampling, processing, identification,and quantification of microplastics in the marine environment
This paper reviews and compares the various methods used to collect, process, identify, and quantify microplastics across different environmental samples. It highlights the lack of standardized protocols as a major obstacle to comparing results across studies and calls for methodological harmonization.
Terenowe metody badania zanieczyszczenia rzek makroplastikiem
This paper reviews field methods for measuring macroplastic pollution in rivers, discussing their environmental impacts on living organisms and the aesthetic degradation of riparian landscapes, as well as the downstream connection to microplastic generation.
The fate of plastic litter within estuarine compartments: An overview of current knowledge for the transboundary issue to guide future assessments
Researchers reviewed global knowledge on plastic fate within estuaries and found plastic concentrations reaching thousands of items per cubic meter in water and sediment, while identifying major methodological gaps — particularly that microfibers are consistently undersampled and that studies rarely account for ecological trophic gradients or the physicochemical dynamics driving plastic distribution and bioavailability.
Progress on microplastics pollution and its ecological effects in the coastal environment
This review systematically summarizes a decade of research on microplastic pollution and its ecological effects in coastal environments worldwide, identifying persistent technical challenges in sampling standardization, particle identification, and ecological impact assessment. Researchers highlight the need for unified methodologies to better understand the sources, fate, and biological consequences of coastal microplastic contamination.
Adapting Coastal Collection Methods for River Assessment to Increase Data on Global Plastic Pollution: Examples From India and Indonesia
This paper promotes adapting coastal debris survey methods to freshwater river systems to close the data gap on how much litter rivers carry to the ocean. Standardized river debris monitoring is essential for understanding the full pathway of plastic pollution from land to sea.
A comparative analysis of global models for riverine plastic input to the ocean
Researchers compared existing global models estimating riverine plastic input to the ocean, identifying key sources of divergence including the number of rivers modelled, item-to-mass conversion factors, and extrapolation methods from microplastic to macroplastic estimates. The comparative analysis highlighted that modelling choices lead to substantial uncertainty in global plastic flux estimates, underscoring the need for a standardised science-policy framework to evaluate plastic pollution mitigation.
Quantification of floating riverine macro-debris transport using an image processing approach
A new image-based algorithm was developed to measure how much floating debris is moving across a river surface, using color detection and template matching. This tool could help track macro-debris transport in rivers, which is the primary pathway for plastic litter reaching the ocean.
Monthly Year-Round Characteristics and Ocean Export of Riverine Organic Matter: Relationship with Microplastics
Researchers conducted year-round monthly sampling of a river system to characterize the quantity and composition of organic matter exported to the ocean, examining how microplastics contribute to allochthonous carbon fluxes and how their transport co-varies with seasonal changes in riverine organic matter dynamics.
Riverine Plastic Pollution: Field Sampling Protocol and Implementation in U.S. Rivers
This paper presents a standardized field sampling protocol for measuring plastic pollution in U.S. rivers. Consistent methodology is essential for comparing data across studies and is designed to capture both surface and submerged plastics including microplastics in riverine systems.
Improving monitoring, analysis and reporting to assess plastic pollution: a matter of comparability
This review examines two decades of microplastic monitoring in aquatic systems, identifying persistent challenges in harmonizing methodologies for sampling, analysis, and reporting that hinder data comparison, and proposing improvements to create comparable datasets for assessing plastic pollution from river basins to the ocean.