基于GIS的湄洲湾易溶液化品污染扩散数值模拟

Numerical simulation of soluble liquid chemical pollutant dispersion in Meizhou Bay based on GIS

利用ArcGIS、VF与VB等软件,进行湄洲湾二维潮流和污染扩散数值模型的计算边界获取、网格生成、水深数据提取及污染浓度可视化等应用,实现一种GIS与数值模型的嵌入式紧密集成模式,并进行易溶液化品溢漏污染扩散模拟的时空分析,探讨污染扩散的规律。结果表明GIS可为具有空间特性的数值建模提供有效支持,二者嵌入式紧密集成模式是可行的。

The computational domain delineation,computational mesh generation,and water depth parameter extraction were carried out for two-dimensional tide-current and pollutant dispersion numerical modeling supported by the software of ArcGIS,VF,and VB. Also a tightly embedding integration pattern of GIS and numerical models was implemented,and with the help of integration system,the spatio-temporal distribution of Soluble Liquid Chemical concentration in Meizhou Gulf was analyzed. At last,the general rule of pollutant dispersion in the gulf was discussed. The results indicated that GIS could provide effective help for numerical model＇s building which has the spatial characteristics,and the tightly embedding integration pattern of GIS and numerical model was feasible.