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Reply for Comment on “Modeling the settling and resuspension of microplastics in rivers: Effect of particle properties and flow conditions”, published by Akdogan and Guven [Water Research 260 (2024) 121900]”
Summary
Researchers responded to peer comments on their microplastic settling and resuspension model for rivers, clarifying their use of Prandtl mixing length theory in estimating settling velocities and defending the formulation of mass-balance equations for microplastic transport across river compartments.
This reply addresses the comments by Deng et al. (2025), who raised concerns about the application of Prandtl's mixing length theory in estimating microplastic settling velocity and the formulation of mass-balance equations for microplastic transport amongst the river compartments. We clarify the relevant points from the original article to prevent potential misunderstandings by readers.