Abstract: The transport patterns of pollutants in natural bodies of water are closely correlated with deposition and resuspension processes of sediment,to which the pollutants attach,and yet the influences of sediment on the transport of pollutants have not been fully studied. We here used transport age to quantify the influences and applied these findings to the Xiyang Sea area of the radial sand ridges in the South Yellow Sea. The governing equations of transport age considering sediment's impacts were derived from sediment-pollutant interaction model. Numerical simulation resolving these equations was used to analyze the transport pattern discrepancy in the presence and absence of sediment and the influence of the partition coefficient of pollutants (K_D). The results show a significant trend of decreased pollutant concentration and corresponding increases in transport age,which indicates that sediment plays a role in weakening the dilution and diffusion processes of pollutants. The partition coefficient of pollutants,which is representative of adsorption capability of sediment,has a positive effect on the transport age. This effect tends to decline to zero when a value of 10³ L/g is achieved for the partition coefficient of pollutants,when the sediment adsorption capacity tends to be saturated.