洛阳盆地浅层地下水资源数值模拟评价

水资源的不合理利用、地下水的过渡开采导致了洛阳盆地水环境的恶化。本文结合洛阳盆地水文地质条件运用数学模型对盆地的浅层孔隙地下水资源进行模拟评价。结果表明:建立二层结构的非均质三维非稳定流数学模型,经模型识别和校正,所选参数是基本合理的,可以比较准确地模拟洛阳盆地第四系浅层地下水系统。盆地地下水补给主要为降水及灌溉入渗补给,地下水排泄主要为人工开采,占总排泄量的75.82%,因此调整和优化现状地下水开采方案,合理开采地下水资源显得尤为必要。

Numerical simulation and evaluation of the shallow groundwater resources in Luoyang basin

The unreasonable use of water resources and the excessive exploitation of groundwater lead to the deterioration of water environment in Luoyang basin.Based on the hydrogeological conditions of the Luoyang basin,the mathematical model is used to simulate and estimate the shallow groundwater resources.The results show that the mathematical model is developed for the two-layers and nonhomogeneous three-dimensional unsteady flow.After the identification and correction by the model,the selected parameters are reasonable and could much accurately simulate the shallow groundwater system in the basin.The simulation results indicate that the recharge of the shallow groundwater in the basin comes from the rain and irrigation supply,but its discharge is mainly the human exploitation,which is about 75.82% of the total discharge.It is need to adjust and optimize the current exploitation scheme of water resources,and the groundwater resources should rationally be exploited.