未来大规模海岸工程对渤海湾潮动力环境影响的模拟研究

Simulation study on the impact of future large-scale reclamation projects on tidal hydrodynamic environment in the Bohai Bay

利用FVCOM海洋数值模型,建立渤海湾,尤其针对天津近海的水动力和水交换模型,经潮汐和潮流实测资料验证,模拟结果可信。通过模拟,研究了海岸工程对渤海湾内潮动力环境和水交换能力的影响,模拟显示,未来海岸工程建设后,天津近海最大局部海域流速变化可达0.25 m/s,纳潮量减少3.2×10~8m^3。水体半交换周期延长10天,建议在未来的海岸工程建设时,事先考虑其对水动力环境和水体交换能力的影响,避免造成不可逆转的后果。

Model-FVCOM was used to establish the Bohai Bay water exchange and hydrodynamic numerical model, then the observed tide and ocean currents data were applied to validate the numerical results. Simulation of impact of future largescale reclamation projects on tidal hydrodynamic environment in the Bohai Bay was then conducted through the model.Result showed that after the construction of the reclamation project in the future, the maximum local sea speed variation in the Bohai Bay was up to 0.25 m/s, and the tidal capacity decreased by 3.2 ×10^8 m^3. The half exchange cycle of water was extended for 10 days. It is suggested that the impact of reclamation on the water environment needs to be taken into account in order to avoid the irreversible consequences of human factors.