基于Visual MODFLOW的汉中盆地三维可视化模型构建方法

Construction method of three-dimensional visualization model of Hanzhong basin based on Visual MODFLOW

根据区域水文地质特征将地下水类型划分为潜水和承压水,概化含水层结构为包气带层、潜水含水层、弱透水层和承压含水层。综合利用钻孔、遥感影像、地质地貌、数字高程数据等资料,利用Visual MODFLOW软件中空间三维、非均质、各向异性的非稳定地下水流系统模型实现三维可视化。结果表明,该模型构建方法能够较为准确地刻画地层结构和水文地质特征,实现三维地质体的精准模拟,为进一步开展地下水数值模拟和溶质运移工作提供支撑。

According to the regional hydrogeological characteristics,the groundwater types are divided into phreatic water and confined water,and generalized aquifer structure as vadose zone,phreatic aquifer,impermeable aquifer and confined aquifer.Through the spatial three-dimensional,heterogeneous,anisotropic unsteady groundwater system model of Visual MODFLOW software to achieve three-dimensional visualization with using drilling,remote sensing images,geological geomorphology and digital elevation data.The results show that the construction of this model can describe more accurately stratigraphic structure and hydrogeological characteristics,realize accurate simulation of three-dimensional geological bodies,and provide further support for groundwater numerical simulation and solute transport.