基于Visual Modflow室内抽灌实验地下水水位变化研究

Groundwater Level Change in Indoor Irrigation Experiment based on Visual Modflow

地下水的过度开采破坏了水资源平衡。为了解抽水及人工回灌行为对地下水流场的变化影响,通过室内实验,测定渗透系数、给水度等水文地质参数,并通过改变抽水量、回灌量进行抽灌实验,记录观测孔水位变化,利用Visual Modflow软件模拟抽水和补给状态,分析计算值与观测值的拟合结果和水位变化对地下水水位的影响。模拟结果表明,拟合效果较好,证明抽水实验所得结论能够反映地下水水位变化规律。抽水强度越大,水位下降越明显;回灌强度增加,水位也从下降趋势变为稳定趋势。

The excessive exploitation of groundwater destroys the balance of water resources.In order to understand the influence of pumping and artificial recharge behavior on groundwater flow field changes,this article used indoor experiments to determine hydrogeological parameters such as permeability coefficient and water supply,and by changing the pumping capacity.Irrigation experiment was carried out on the recharge amount,the water level change of the observation hole was recorded,and the pumping and replenishment status were simulated by Visual Modflow software.The fitting result of the calculated value and the observa-tion value and the influence of the water level change on the groundwater level were analyzed,and the groundwater resource was scientifically replenished.The simulation results show that the fitting effect is better,which proves that the conclusions obtained from the pumping experiment can reflect the law of groundwater changes.The greater the pumping intensity,the more obvious the water level decline.The recharge intensity increases,and the water level changes from decreasing to stable trend.