安全与环境工程2016，Vol.23Issue(5)：20-28,9.DOI:10.13578/j.cnki.issn.1671-1556.2016.05.004
基于嵌套模型的地下水侧向径流边界刻画方法研究--以湖北碾盘山冲积平原地下水数值模拟为例
Study on Characterization Methods of Groundwater Lateral Flow Boundary Condition Based on the Nested Model- A Case Study of Groundwater Numerical Simulation of Nianpanshan Alluvial Plain in Hubei Province
摘要
Abstract
Lateral flow boundary condition is a key issue in numerical simulation of ground water.Taking Nianpans-han hydropower proj ect in Hubei as an example,based on the finite element method and the water transformation of the nested model,this paper sets up a regional model which contains a complete hydrogeological unit and a plain terrain model which only covers theⅠlevel terrain of Han River.Through water balance calculation in different sec-tions of the regional model,the paper confirms the flux of the lateral flow boundary.Then,in the regime of the re-gional water balance,the paper establishes the plain terrain model respectively with the lateral flow boundary depic-ted by the Dirichlet boundary condition and the Neumann boundary condition.Next,the paper analyzes the relation-ship between the two models both in model parameters and water transformation relations,and compares the pros and cons and applicable conditions between the two kinds of boundary conditions in depicting lateral flow bounda-ry.The result shows that accurate lateral groundwater runoff can be calculated by using the nested model,and using Neumann boundary condition depicting lateral flow boundary is helpful to improve accuracy and stability of the plain terrain model.It is concluded that the boundary condition has dual-characteristics along with the dual-mean-ing.In the process of building models,the position characteristics (water level)and the quantity characteristics (water volume)should be fully recognized.关键词
地下水/侧向径流边界/数值模拟/嵌套模型/水均衡Key words
groundwater/lateral flow boundary/numerical simulation/nested model/water balance分类
资源环境引用本文复制引用
汪祯宸,陈植华,徐栋,彭康..基于嵌套模型的地下水侧向径流边界刻画方法研究--以湖北碾盘山冲积平原地下水数值模拟为例[J].安全与环境工程,2016,23(5):20-28,9.基金项目
湖北碾盘山水利水电枢纽工程浸没问题地下水数值模拟专题研究项目 （）
