基于Visual Modflow的河流阶地灌溉区地下水模拟分析——以黑台为例

Simulation and analysis of groundwater in irrigation in a river terrace based on the Visual Modflow: taking the Heitai Platform as an example

采用Visual Modflow软件,综合野外工程地质调查、水文地质钻探、井泉调查以及高密度电法探测等方法,进行了不同灌溉条件下的黑台地下水数值模拟,可为黑方台农业用水规划、地下水位变化以及斜坡稳定性的预测提供参考.结果表明,随着时间的变化,西侧的地下水位值逐渐降低,东侧的地下水位逐渐升高,整体上水流方向由西向东,在台塬东侧及南、北侧排泄;灌溉量与地下水位值呈显著正相关关系;模拟所得地下水水位值与高密度电法实测的地下水位分布进行对比,两者有很好的对应关系.

The paper used the Visual Modflow software,comprehensive field engineering geological survey,hydrogeological drilling,well spring survey and electrical resistance tomography,to carry out a numerical simulation of Heitai Platform groundwater under different irrigation conditions,which could provide reference for the prediction of agricultural water use,groundwater level change and slope stability in the place.The results showed that,with the change of time,the groundwater level in the west side gradually decreased,and that in the east side gradually increased.The overall water flow direction was from west to east,and was discharged on the east and south and north sides of the platform.In the irrigation volume and groundwater there was a significant positive correlation between the bit values;the groundwater level value obtained by the simulation was compared with the measured groundwater level distribution by the electrical resistance tomography method,and there was a good correspondence between the two.