| 基于VSF的非饱和-饱和带耦合过程的三维水流数值模拟 |
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| 引用本文： | 胡慧君,宋健,吴剑锋,吴吉春.基于VSF的非饱和-饱和带耦合过程的三维水流数值模拟[J].地下水,2020(1):1-4. |
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| 作者姓名： | 胡慧君 宋健 吴剑锋 吴吉春 |
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| 作者单位： | 南京大学地球科学与工程学院 |
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| 基金项目： | 国家自然科学基金项目“地下水中典型污染物反应性迁移与修复的随机模拟优化研究”(41772254);国家重点研发计划项目课题“沿海地区地下水开采优化调控技术研究”(2016YFC0402807)。 |
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| 摘 要： | 包气带作为"四水转化"的关键带,在地下水流与溶质运移模拟中起着重要作用。VSF是一款基于MODFLOW-2000开发的用于模拟非饱和-饱和带水分变化和运移过程的数值模拟程序。本文首先介绍了VSF程序的设计原理与结构,并重点介绍了VSF区别于MODFLOW-2000的用以概化非饱和带水分运移和边界条件设置的子程序包模块,包括Richards方程渗流(REF)、浸润面(SPF)、地表滞水(PND)、地表蒸发(SEV)和植物根区蒸散发(RZE)等子程序包。本文以REF、SPF、PND和SEV等子程序包为例,将VSF与MODFLOW-2000耦合应用于一个非饱和-饱和带水流运移过程的模拟算例。结果表明,VSF可与MODFLOW耦合实现饱和带水位与非饱和带饱和度的同步计算,并能刻画模型中单元格饱和状态的变化过程,其多种实用的边界条件可提供较为全面的模拟条件,是模拟实际包气带-饱和带耦合问题的有效工具。
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| 关 键 词： | VSF MODFLOW 非饱和-饱和带 变饱和度 耦合模拟 |
Three-dimensional VSF-based numerical modeling of coupled unsaturated-saturated flow in the subsurface system |
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| HU Hui-jun,SONG Jian,WU Jian-feng,WU Ji-chun.Three-dimensional VSF-based numerical modeling of coupled unsaturated-saturated flow in the subsurface system[J].Groundwater,2020(1):1-4. |
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| Authors: | HU Hui-jun SONG Jian WU Jian-feng WU Ji-chun |
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| Institution: | (School of Earth Sciences and Engineering,Nanjing University,Nanjing 210023,Jiangsu,China) |
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| Abstract: | In the critical zone of " four kinds of water transformation",the aeration zone plays an important role in simulating groundwater flow and solute transport in subsurface systems. VSF is a numerical model for simulating the process of saturation variation and groundwater flow in unsaturated-saturated zone based on MODFLOW-2000. The study introduces the design principles and structures of VSF process and emphatically elucidates simulation process of VSF,which is different from those in MODFLOW-2000. The VSF model is used for generalization of water migration and boundary condition in unsaturated zone and composed of five subroutine packages which are Richards Equation Flow( REF),Seepage Face( SPF),Surface Ponding( PND),Surface Evaporation( SEV) and Root Zone Evaporate transpiration( RZE). This study integrates VSF with MODFLOW-2000 for the simulation of the groundwater system of unsaturated-saturated zone. Result shows that the VSF coupled with MODFLOW-2000 can fully capture the variation process of saturation in the unsaturated zone and achieve the groundwater head and saturation simultaneously. In addition,its flexible boundary conditions can provide the comprehensive modeling environment for users. Therefore,VSF model is an effective tool to simulate groundwater system in the unsaturated-saturated zone. |
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| Keywords: | VSF MODFLOW unsaturated-saturated zone variable saturation coupled simulation |
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