海域移动源溢油污染事件寻源搜索方法研究

Research on source search method for searching moving source of marine oil spill pollution accident

本文建立了基于水动力学模型潮流场模拟、风场数据及其求逆耦合的海域溢油污染事件寻源搜索数学模型。以海域水动力学模型模拟溢油油膜发现时刻前该海域的潮流场,并建立潮流场数据库;收集并建立溢油油膜发现时刻前该海域风场数据库;建立风、流场逆向耦合的溢油寻源搜索数学模型,并通过与研究海域电子海图的幕景叠置,反向递推搜索海域溢油污染事件源。以广西防城港海域溢油污染事件为例,验证方法的有效性:文中建立的溢油寻源搜索方法数学模型,以水动力学模型数值模拟、风场数据及其求逆耦合为基础,保证了方法的可靠性;同时采用保持原油膜包络范围的方式又为海域溢油污染事件进一步的精确定位提供合理的搜索空间。

A numerical model for source searching is presented for the marine oil spill pollution accident in this paper, based on the tidal current field simulation of hydrodynamics model, wind field data and their anti-direction coupling. The tidal current field before the found moment of oil spill is simulated by the hydrodynamics mode/. The tidal current field database is established. The marine wind field database is collected and set up before the oil spill found mo- ment. The numerical model for source searching is constructed with the anti-direction coupling of tidal current field and wind field. The source of marine oil spill pollution accident could be found by the anti-direction searching, com- bined with the overlay of electronic chart. Case study in the Fangcheng Port of Guangxi Province is conducted for vali- dating the presented method. Verification results show the presented method is reliable, based on the tidal currentfield simulation of hydrodynamics model, wind field data and their anti-direction coupling. A reasonable search space for the further precise positioning of the marine oil spill pollution accident could be provided by the invariant envelope scope of oil spill.