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In order to research the distribution of residual chlorine of LNG drainage in the ocean, further to formulate reasonable wastewater marine disposal scheme and provide scientific support to the protection of environment. According to the tidal current characteristics of the drainage and receiving waters in the LNG project and the design of the typical hydrological conditions of different seasons, a 2D hydrodynamic model was used to simulate the tidal current field of waters receiving residual chlorine in cold water discharge in the Radial sand ridge group of shallow sea area of Jiangsu maritime space. And as the hydrodynamic conditions in the simulation of the cold water mobility and transfer of two dimensional model of the transport and diffusion for the residual chlorine was established to predict the receiving waters residual chlorine concentration distribution and analyze its environmental impact in considering the residual chlorine in water body of attenuation effect at the same time. Finally, the scope of influence caused by the chlorine water drainage in the chlorine water's sphere was analyzed quantitatively according to the chronic toxicity threshold line of residual chlorine. Results show that the residual chlorine in LNG cold drainage less affected in the water environment.

Numerical simulation of the effects on residual chlorine water discharge from LNG on the ocean water environment