Environmental assessment of the Water Exchange ability of Shuidong Bay, China based on numerical simulations

摘要

Based on numerical simulations on the hydrodynamics and dissolved tracer transport, the water exchange ability of the Shuidong Bay, China was simulated, and the regulation effects of different scenarios are evaluated. Through analysis, at present the water exchange ability of the Shuidong Bay is poor with monthly exchange rate only 65%. If the bay was dredged to bottom elevation -3.0m, the monthly exchange rate could be greatly enhanced to 88%. If a new western tidal inlet was constructed, its contribution to the exchange rate is not significant, and the monthly exchange rate is 67%. After comprehensive comparisons, the scenario of proper dredging the Shuidong Bay is suggested.