| Near shore area plays a strategic role in the development of economy for one country. The study on modeling environment and application is very significant. The first object of the paper is to establish current-sediment-biological model for the near shore area. Another one is to applied the environment model to the Jiaozhou bay. The paper have two parts, in the first part, the modeling was studied. In the second one, the environment model was applied to Jiaozhou bay.Significant result has been achieved in the following aspects.1.on the base of ECOM-SI model, a NPZD ecological dynamical module, a sediment module and a wave module with the ECOMSED are coupled. A dry-wet three-dimensional physical-sediment-ecological model has been established, which is a useful tool for the ocean environment management and planning. Some current advanced ocean numerical modules have been integrated. Using the model, the tidal field, sediment concentration, nutrient concentration and the biomass of the phytoplankton have been simulated. The simulation results conform to the observed data.2.In order to meet the need of the near shore area, the mass transport model has been improved by adopting the Euler-Lagrange scheme to the advection term. Through the application to Jiaozhou bay, the numerical results are well. The improvement is more value to the modeling environment of near shore area.3.On the base of simulation of tidal current, the impacts of Qianwan bay marine reclamation land on the hydrodynamic was studied. Some meaningful conclusion has been obtained in the following. The effect on the tide bulge system is very little. The variation range of the amplitude or the phase is less than 1%. As to the effect on the tidal and residual current, the influence is very large in Qianwan bay and the local round the engineering. After sea-filling the tidal current decrease 16.9%~55.7%,and the residual current decrease 29.0~70.1%. in the other sea area the effect is little, the...
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