试验场地下水流的数值模拟

Numerical simulation of groundwater flow in test field

为研究某市建的试验场是否对周边地下水量造成影响,采用伽辽金有限单元法,建立试验场浅层地下水水流模型,使用Fortran语言对所建立模型进行编程,并对试验场地下水进行了数值模拟。本次计算共分为十二个阶段,每个阶段的时间步长为30 d。计算结果表明:在模型的识别阶段和验证阶段,所有观测孔水头的计算值与观测值,在各时段拟合相对误差率分别为66.28%和88.53%,所建模型基本可用于试验场地下水水流计算。周边地下水水位增加94.08 mm,试验工程建成后会对周边地区造成影响。

In order to study whether test field affect surrounding underground water or not,the paper used the Galerkin finite element method to establish shallow groundwater flow model of test field and used Fortran language to program to flow model and carried on numerical simulation to test field underground water.The calculation is divided into twelve stages,the time step of each stage is 30 days.The calculation results show that in the model recognition phase and confirmatory phase,all of the observation hole water head are calculated and measured,relative error rates are 66.28% and 88.53% in each period,the model can be used to conduct site groundwater flow calculation.The level of groundwater in surrounding area increases 94.08mm,test project after completion can affect the surrounding field.