Abstract
As an attempt on the estimation of the permissible load to enclosed coastal sea, we showed the difference in the characteristics of the eutrophication on each bay and the estimation of the permissible load of TN and TP by using the correlation figure of the loads of TN and TP per unit area and the product of the average water depth and the renewal rate. These results of the study can contribute to the proposition of the water quality improvement plan accoding to the characteristics of the bay.
