Numerical Simulation of Aquatic Eco-Environment for Coastal Water of Bohai Bay

Due to the rapid economic development along the coastal area of Bohai Bay, serious contamination and deterioration of the eco-environment has been manifested as a result of intensified exploitation activities. In this paper, the hydrodynamic characteristics of the water exchange and long-shore currents of Bohai Bay have been analyzed by numerical simulation. Field monitoring and Grey Relation Valuation Method were adopted to study the current situation of the aquatic system. The results implied a strong influence of land-source pollution. To determine the nutrient contribution of the bottom sediment to the water layer and to provide source data for the simulation of the dynamic of plankton ecology system, nutrient exchange fluxes between the water and bottom sediment interface was studied, which indicated the strong influence of the nutrient release from bottom sediment. The characteristics of the dynamics of the eco-system of Bohai Bay were simulated by using a 2D eco-hydrodynamic model, which consisting of a hydrodynamic sub-model and an eco-system sub-model. The results agreed with the measured data. By using numerical simulation, the impacts of coastal exploitation on the hydrodynamic and eco-dynamic processes in Bohai bay have been analyzed. The further development of numerical simulation of aquatic eco-environment for coastal water has been introduced.