Hydrological Processes, Journal Year: 2025, Volume and Issue: 39(2)
Published: Feb. 1, 2025
ABSTRACT Environmental contamination by plastics has been receiving considerable attention from scientists, policymakers and the public over last few decades. Though some of models have succeeded in simulating transport fate plastic debris freshwater systems, a complete model is now being developed to clarify dynamic characteristics budget on continental scale. Recently, author linked two process‐based eco‐hydrology models, NICE (National Integrated Catchment‐based Eco‐hydrology) NICE‐BGC (BioGeochemical Cycle), that accounts for both (advection, dispersion, diffusion, settling, dissolution biochemical degradation light temperature), applied this new regional scale also global major rivers. The present study newly incorporated resuspension bedload extending author's previous investigations. simulated results showed large‐sized micro‐plastics were distributed more riverbeds than river water. Although small‐sized are suspended water settle riverbed under normal flow, floods disturb equilibrium completely resuspend Because percentage exported micro‐plastic load stored during flood periods relatively high rivers, amount deposited might be smaller lakes dams. riverine ocean revised was 1.218 ± 0.393 Tg/yr, with macro‐plastic flux 0.793 0.305 Tg/yr 0.426 0.248 within range values, is, 0.41–4.0 Tg/yr. These aid development solutions measures reduction input ocean, help quantify magnitude climate change.
Language: Английский