抄録
Ise Bay and Mikawa Bay are typical semi-enclosedb ays. For this reason in both bays oxygen-deficientw ater mass is generated mainly during summer and has caused heavy damage to the sea area environment. It is important to reduce the generation of the oxygen deficient water mass to improve the sea area environment of both bays.
In this research, a field investigationw as conductedt o find out the behavioro f the oxygendeficienwt ater mass in Ise Bay and Mikawa Bay. As a result, it was confirmed that a physical process that forms isolated water mass at the bottom layer in the central part of the bay has caused the oxygen -deficient water mass in Ise Bay. On the other hand, it was found out that the stratification developed by the inflow of fresh water on the eastern side of the bay has generatedt he oxygen-deficienwt ater mass in Mikawa Bay.
