中文摘要：

针对水污染运移仿真模拟表现力不足的问题，在水污染事件数据与空间数据集成的基础上，进行干流河道多尺度分解形成水质三角体积微元，建立色阶模式和格网视域模型，搭建以3S数据、OGC规范、瓦片金字塔、高性能计算、互操作环境为主体的数字地球可视化服务框架，并进行系统实现和应用。实验表明：本文方法能够有效反映污染物的演化状况，并可以汇集数字地球所提供的地形地貌数据，更加丰富直观的表现水污染运移过程。

英文摘要：

According to the problem of insufficient performance for water pollution migration simulation, On the basis of water pollution event data and spatial data integration, the main watercourse was decomposed to multi-scale triangle face for forming water quality infinitesimal. The halftone patterns and mesh view model was set up. A Digital Earth visualization service framework was constructed with 3S data, tiles-pyramid, OGC standard, high-performance computing, interoperability environment etc as principal part. And a system was realized for application test. The experiment results show that： this method can effectively express the status of pollutants evolution, and describe the migration process of water pollution more intuitively with topography data collected and provided by Digital Earth.