海口港新海港区配套用地施工溢油漂移扩散研究

Study on the Drift and Diffusion of Oil Spill During Construction for Land Supporting in the Xinhai Port District of Haikou Port, Hainan Province

填海造陆施工溢油问题是海洋工程环境影响评价内容之一,海口港新海港区配套用地位于琼州海峡澄迈湾东海岸。研究首先采用DELFT3D软件技术建立了工程海区水动力数学模型,在模拟验证成果与天然实测资料达到精度要求后,对琼州海峡及工程近区潮流特征进行了模拟分析。然后基于"拉格朗日"水流运动理论,建立了"油粒子"溢油漂移扩散模型。依据海洋工程环境影响评价技术导则要求,对海区夏季主导风、冬季主导风作用下和溢油点位置潮流东流、西流初始时刻组成的四工况进行溢油漂移扩散模拟,给出溢油扩散轨迹和扫海面积,为项目建设海洋环境影响评价及溢油事故应急治理提供了技术支撑。

In marine engineering environmental impact assessment, the oil spill problem during construction and sea reclamation is an important content. The Xinhai Port District of Haikou Port is located at the east coast of Chengmai Bay in the Qiongzhou Strait. Firstly, the mathematical model of hydrodynamics is established for the engineering sea area with the Delft3d software. After the calculated result of the model is consistent with the nature data, the tide velocity is simulated and analyzed for the Qiongzhou Strait and the district near the engineering sea area. Then the drift and diffusion model of oil particles is established based on Lagrange＇s tlow theory. In line with the technical guidelines for environmental impact assessment on marine engineering, four oil spill situations are simulated lander the dominant wind in summer or in winter combined with initial time of tidal currents flowing eastward or westward at the location of oil spill. The drift paths and swept areas are described, and the results provide a technical support for marine environmental impact assessment on project construction and emergency management of oil spill.