Research and application of Mike21 model in marine environmental impact assessment from fifth stage project of Beilun harbor

In this paper, water environment influence is simulated effectively from Beilun fifth stage engineering construction based on precise flow field of Beilun harbor. owing to piled wharf structure, engineering construction on non-pollution ecology hydrodynamic environment influence is small, only engineering local has certain influence; During the influence of suspended solids is primary, and affect scale is small through calculation, in addition influence has come to an end along with the project finished; Operating period, sewage discharge area is in category ii area, COD super category ii of regional influence on water environment affect scale is limited, so construction engineering feasible.