地下水数值模拟与可视化建模系统框架研究

摘要

The existing groundwater flow finite element numerical simulation method has the defects in the three-dimensional visual spatial a-nalysis and expression of numerical calculation process and simulation results. Based on the finite element method and 3D GIS platform,the method and technique framework of the groundwater finite element numerical simulation under 3DGIS were proposed in the supports of GIS spatial analysis algorithms and computer graphics theory.In addition to the description of the technique framework,the core algorithms imple-mentation details were given and the whole process of 3D GIS groundwater flow simulation was presented. Groundwater simulation example demonstrates that the proposed method and technique framework are capable of simplifying the finite element analysis process and improving the model calculation efficiency.%针对现有孔隙地下水有限元数值模拟在三维可视化与空间分析等方面存在的不足,以有限元数值计算方法和3D GIS平台为基础,结合GIS空间分析算法和计算机图形学理论,提出了孔隙地下水有限元分析过程的概念模型的构建、含水层介质的空间离散、水文地质参数提取与赋值等关键步骤,给出了孔隙地下水有限元数值模拟过程在3D GIS下的实现方法和技术框架.该技术框架旨在简化有限元分析流程、优化模型计算效率、实现地下水有限元数值模拟过程及计算结果的三维可视化.结果表明:基于3D GIS构建的三维水文地质模型,可充分反映地下水系统在3D空间上的分布特征,形成合理的水文地质概念模型,所提出的自适应格网动态生成机制,能够有效改进有限元数值模拟精度和效率.