Environmental Impact Study on the Residual Chlorine Diffusion during the Intake-Outlet Project of LNG Wharf

Abstract

Taking the intake-outlet project of Zhoushan LNG wharf as background, using a 2-D numerical model to simulate the tidal current field around the project, then predict the residual chlorine concentration distribution based on advection-diffusion equation, after calculate the residual chlorine diffusion scope, environmental impact caused by the intake-oulet project was analyzed, especially the impact on the reserve areas nearby. Research results show that: the influence aboved is very little, residual chlorine diffusion mainly concentrated around the outlet, the diffusion area with residual chlorine concentration more than 0.02mg/l and more than 0.1mg/l are respectively less than 0.2 km2 and 0.05km2, although it does have a little influence to the border area of the East China Sea Hairtail Reserve during Case B, but the residual chlorine concentration is less than 0.03mg/l, and the influence distance is only within 50m.