An equilibrium criterion for plastic debris fate in wave-driven transport DOI Creative Commons
Claudio Iuppa, Giovanni Passalacqua, Carla Faraci

et al.

Marine Pollution Bulletin, Journal Year: 2024, Volume and Issue: 206, P. 116758 - 116758

Published: Aug. 3, 2024

The nearshore zone turns out to be the area with higher concentration of plastic debris and, for this reason, it is important know processes that affect transport and fate type litter. This study focuses on investigating dynamics various types under several hydrodynamic conditions primarily induced by waves. 2D tests were carried at Hydraulic Laboratory University Messina reproducing main phenomena occurred during wave propagation a planar beach. More than 200 different tested changing characteristics, water depth, characteristics (density shape), roughness fixed bottom. In general, can observed reduction in particle displacement occurs due to: i) decrease steepness; ii) an increase depth; iii) size; iv) density. However, experimental investigation shows some bed roughness, even when hydraulically smooth, alter these results. data analysis identified criterion predicting short-term action. determine equilibrium conditions, based empirical relationship, takes into account slope, weight debris.

Language: Английский

Model-based estimation of seasonal transport of macro-plastics in a marine protected area DOI Creative Commons
Martina Stagnitti, Rosaria Ester Musumeci

Marine Pollution Bulletin, Journal Year: 2024, Volume and Issue: 201, P. 116191 - 116191

Published: Feb. 29, 2024

Management of plastic litter in Marine Protected Areas (MPAs) is expensive but crucial to avoid harms critical environments. In the present work, an open-source numerical modelling chain proposed estimate seasonal pathways and fates macro-plastics, hence support effective planning implementation sea beach cleaning operations. The approach applied nearshore region that includes MPA Capo Milazzo (Italy). A sensitivity analysis on influence tides, wind, waves river floods over year indicates seasonality only slightly affects location extension macro-plastic accumulation zones, operations should be performed autumn. Instead, rivers distribution for optimal interventions coastal area.

Language: Английский

Citations

5
Experimental study of buoyant macro- and mesoplastic trapping by Spartina maritima DOI Creative Commons
Paula Núñez,

Laura Pérez-García,

Seyed Meysam Rezaee

et al.

Marine Pollution Bulletin, Journal Year: 2025, Volume and Issue: 216, P. 118005 - 118005

Published: April 19, 2025

A set of laboratory experiments was conducted to assess the trapping efficiency buoyant plastic debris by estuarine vegetation Spartina maritima. Different hydrodynamic conditions typical salt marshes were simulated in a hydraulic flume. These included varying water levels between 40% and 90% stem height, wind speeds up 2 m/s, unidirectional current velocities 0.1 0.3 m/s. Moreover, three densities (small/medium/high) nine types shape (elongated/two-dimensional/three-dimensional) size (macro/meso) tested. The results indicate that maritima functions as natural trap. Specifically, study highlights lower surface velocities, higher densities, greater emergent heights, larger sizes significantly enhance efficiency. It also inferred for density comparable observed marshes, dominance velocity or effects on is primarily dependent shape. Consequently, has impact two-dimensional elements, whereas more significant three-dimensional elements. Finally, preliminary model developed integrate all aforementioned variables. This potential accuracy numerical predictions regarding transport fate using Lagrangian modeling, can be further refined incorporating additional data.

Language: Английский

Citations

0
Qualitative Study of the Transport of Microplastics in the Río de la Plata Estuary, Argentina, through Numerical Simulation DOI Creative Commons

Alejandra Elisei Schicchi,

Diego Moreira,

Patricia Eisenberg

et al.

Journal of Marine Science and Engineering, Journal Year: 2023, Volume and Issue: 11(12), P. 2317 - 2317

Published: Dec. 7, 2023

Information about the sources, sinks, dynamics, and how environmental variables affect transport of microplastics (MPs) from continental deposits to marine systems is still limited. Most knowledge distribution plastic in oceans comes use numerical models understand routes MPs moving aquatic systems. The Río de la Plata (RdP) an estuary located on eastern coast South America one most anthropized watercourses region. In this study, trajectory RdP was examined through implementation, for first time region, simulation models. impact estuary’s hydrodynamic characteristics, winds, MP morphological properties their investigated. simulations produced demonstrated a high correlation between hydrodynamics positively buoyant MPs. wind identified as significant driving force motion dynamics. Modifications size have more influence than morphology. results constitute initial step toward understanding dynamics these emerging pollutants America’s important basins.

Language: Английский

Citations

6
An equilibrium criterion for plastic debris fate in wave-driven transport DOI Creative Commons
Claudio Iuppa, Giovanni Passalacqua, Carla Faraci

et al.

Marine Pollution Bulletin, Journal Year: 2024, Volume and Issue: 206, P. 116758 - 116758

Published: Aug. 3, 2024

The nearshore zone turns out to be the area with higher concentration of plastic debris and, for this reason, it is important know processes that affect transport and fate type litter. This study focuses on investigating dynamics various types under several hydrodynamic conditions primarily induced by waves. 2D tests were carried at Hydraulic Laboratory University Messina reproducing main phenomena occurred during wave propagation a planar beach. More than 200 different tested changing characteristics, water depth, characteristics (density shape), roughness fixed bottom. In general, can observed reduction in particle displacement occurs due to: i) decrease steepness; ii) an increase depth; iii) size; iv) density. However, experimental investigation shows some bed roughness, even when hydraulically smooth, alter these results. data analysis identified criterion predicting short-term action. determine equilibrium conditions, based empirical relationship, takes into account slope, weight debris.

Language: Английский

Citations

1