孔隙水文地质层三维建模与可视化研究

针对孔隙水文地质层空间分布的复杂性及现有地下水数值模拟中空间离散存在的问题,在分析剖面图等地质资料的基础上利用钻孔数据,对孔隙水文地质层空间上下关系进行划分。为了保证上下三角形的一一对应性,如果对某一层的顶层(底层)三角形进行了自分解操作,则该层底层(顶层)的三角形也要进行这样的操作。对每一层进行TIN构建后,连接相应三角形的对应顶点形成对整个地质体的三棱柱剖分,各层不规则三角网具有参考系一致、能准确匹配及一一对应的特性。采用三棱柱对孔隙水文地质层进行三维空间离散,在保证孔隙水文地质层类型的一致性的基础上,提高了水文地质模型三维空间建模及地下水模拟的精度。

3D Modeling and Visualization for Interstitial Geohydrology Succession

In view of the distributing complexity of interstitial geohydrology succession and current problem of 3D spatial dispersing in groundwater numerical simulation,the borehole data based on other geological data,like profile section,was used to divide the interstitial geohydrology succession into the upper and the lower.In order to ensure one-to-one correspondence of the upper and lower triangular,and if the self-decomposition operation of one layer top (bottom) level for one triangular is made,the bottom (top) level triangular also adopts self-decomposition.After building Triangulated Irregular Network for each level,the upper and lower vertexes of triangle are connected to form a triangular prism for the whole geological body.Each layer's Triangulated Irregular Network (TIN) has the same reference coordinate system and can correctly match and correspond with each other.Finally the 3D spatial dispersing is made on the interstitial geohydrology succession by the triangular prism.It can not only keep the type unitary of interstitial geohydrology succession,but also improve the 3D spatial modeling of the interstitial geohydrology succession and the precision of groundwater numerical simulation.