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Forecasting plastic mobilization during extreme hydrological events
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This study developed a modeling framework to forecast plastic mobilization from land during extreme hydrological events such as floods and heavy rainfall, finding that storm intensity and land use strongly influence plastic export to waterways. Researchers identified high-risk catchment areas where targeted interventions could reduce plastic loading to aquatic systems.
Plastic pollution of aquatic ecosystems is an emerging environmental risk. Land-based plastics are considered the main source of plastic litter in the world’s oceans. Quantifying the emission from rivers into the oceans is crucial to optimize prevention, mitigation and cleanup strategies. Although several studies have focused on estimating annual plastic emission based on average hydrology, the role of extreme events remains underexplored. Recent work has demonstrated that floods can mobilize additional plastics. For example, the 2015/2016 UK floods resulted in a 70% decrease of microplastic sediments in several catchments. In this project, the use of the Global Flood Awareness System (GloFAS) flood forecasting system to assess additional mobilization of plastic pollution will be explored.
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How flooding rivers deliver plastic to the ocean: A case study of microplastic and mesoplastic load–discharge relationships
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A field study tracked how a flooding river delivered plastic debris to the ocean, mapping the rapid transport of macroplastics and microplastics during a high-flow event. The research shows that floods are major episodic drivers of plastic export from land to sea, contributing disproportionately to ocean plastic budgets.
Catchment-scale mechanistic predictions of microplastic transport and distribution across land and water
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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.
Modelling land use influence on polymer-specific microplastics abundance and transportation from terrestrial to aquatic environments
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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.
Plastic in global rivers: are floods making it worse?
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Researchers combined global data on mismanaged plastic waste with river flood models to estimate how floods mobilize plastic pollution. They found that floods with a 10-year return period can increase plastic mobilization tenfold, with low- and middle-income countries disproportionately affected. The study suggests that climate-driven increases in flood frequency could significantly worsen riverine plastic pollution worldwide.
Microplastic dynamics at the outlet of a peri-urban catchment over a year of sampling: Effects of hydrological conditions, including an extreme flood event
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Researchers monitored microplastic dynamics at the outlet of a peri-urban catchment over one year, examining how hydrological conditions including an extreme flood event influenced MP concentrations and fluxes. The study found that hydrological variability, particularly high-flow events, significantly affected microplastic transport patterns from the catchment.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.