Residence time of sea water in Tokyo Bay at 2002 and reproducing residence time with multi-box vertical one dimensional model

Abstract

The aims of this paper are to estimate the residence time of sea water in Tokyo Bay from field observation results and to apply the multi-box vertical one dimensional model (MEL1D-MB) to reproduce the salinity distribution. The field observation was carried out at 27 points inside of Tokyo Bay one or two times per month from July 2002 to June 2003. The residence time of sea water was obtained by using the salinity from the field observations and the estimated fresh water which flows into Tokyo Bay. The residence time is found to be 45-60 days in winter and 15-35 days in summer, respectively. The application of the MEL1D-MB was carried out and the reproduced salinity distribution comparatively agreed with the observational results. The residence time obtained from the MEL1D-MB also agreed with the residence time from the field observations.