The suspended sediment concentration and bottom sediments around Heini Bay were collected in winter, 2004. According to the information of suspended matter, bottom sediments and 2 remote sensing images, the distribution and diffusion characteristics of suspended sediment concentrations at surface and bottom layers were studied in the study area, the primary factors effecting the suspended sediment concentration distribution and the origin of them were analyzed. The result shows that the primary factors were wind and tidal flow. The suspended sediment concentration was great in shore in summer, gradually reduces seaward, and it is just contrary in winter. The main matter origins of suspended sediment concentration were from the erosion alongshore, gullied and transportation, resuspending of seabottom sediment.
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