The complex dynamic structure formed by the nearshore topography is of great significance to the water transport and the layout of the project. In this paper, the mathematic model was established to simulate the
transportion of cooling water and the layout of the cooling water drainage port in Dayawan Bay. We also compared and analyzed the suitability of different arrangements such as south arrangement and north arrangement, south water intake and north water intake, deep arrangement and shallow arrangement. The results show that the shielding effect of the breakwater, the headland of the Hutoujiao and the Boshashan headland on the Yancongwan bay is the reason for the waste heat accumulating in the first scheme, and the temperature rise of the drainage scheme is 0.21 ℃ higher than that of the open channel. Bijia Port form two mouth topography and the two jet structure, which increase thermal pollution area in the first scheme, and is beneficial to the second scheme with temperature decrease of 0.2 ~ 0.3 ℃, and the coastline long - term planning in project zone area should take into account the drainage project layout.