<p>A new parameterization is proposed to characterize the impact of the flocculent layer on the resuspension process of fine-grained sediments in estuarine environments. This parameterization considers the effects of sediment consolidation and the temporal evolution of bottom shear stress on flocculent layer resuspension. It is implemented in a size-resolved sediment transport model and assessed through laboratory experiments conducted under a variety of conditions. Compared to traditional parameterizations, the new parameterization performs comparably in low turbidity situations and significantly reduces the mean absolute errors (MAE) of suspended sediment concentration (SSC) simulations by an average of 10.67% ~ 30.94% in various high turbidity situations. Further assessment in the Hudson River estuary demonstrates that the new parameterization leads to a significant reduction in MAE of SSC simulations by 16.52% ~ 46.22%. Sensitivity analyses of each parameter used in this parameterization further support its robustness. Overall, the new parameterization offers a more accurate representation of flocculent layer resuspension and holds potential for advancing fine-grained sediment modeling in estuarine environments.</p>