Abstract
Roberts Bank tidal flat, which is located at the mouth of the Fraser River, has been wellknown as one of the world's largest tidal flats for migratory birds. In the previous studies, biofilm, which exists in a lower salinity region, is found to be significant source of nutrients. However, it has not been revealed how infiltration flow influences salinity inside of a tidal flat. We thus conducted field observations of salinity at the depth of 0.2 m from tidal flat surface. Additionally, in order to clarify horizontal distribution of salinity, two-dimensional salinity model was proposed in this study, which shows very good agreement with field observation results.
