Recently, it is feared that enclosed sea areas are contaminated by industrial and household drainages. For the purpose of the water quality improvement there is a method to accerate the seawater exchange between the bay and the open sea by using the cooling water intake and discharge of the steam power station in an enclosed sea area. In this paper, the effects of cooling water on the sea water exchange are studied experimentally and numerically. As a result, the contribution of cooling water on the sea water exchange is estimated quantitatively. And the adaptability of the 3D numerical model used to simulate a sea water exchange is evaluated by comparison of numerical results
