地下水害防治水位动态监测孔网数值优化

Numeric Optimization of Level Performance Monitoring Borehole Net for Groundwater Calamity Preventing and Controlling

针对某岩溶矿区实施帷幕注浆工程后,现有地下水位动态监测孔网无法继续准确反映地下水位动态变化的问题,为达到精确监测地下水流场水位的目的,运用Kriging插值方法,获取矿区需增设和封填的地下水位动态监测孔,并提出水位监测孔网优化备选方案。在利用数值分析软件Visual Modflow模拟预测未来2 a地下水位情况的基础上,根据平均预测水位梯度及丰、枯季节最大水位差获得应调整的水位监测孔,从而确定最终网优化方案:封填动态监测孔ck109并增设动态监测孔n1,n2,n3。最后,运用Kriging法交叉验证优化方案。结果表明,优化的动态监测孔网能够更准确地反映地下水位信息。

could not trict after tion boreh In view of the problem that the current groundwater level performance monitoring borehole net reflect morphology and variation of groundwater flow field accurately in a certain karstic mine dis- grouting curtain project, in order to monitor the groundwater flow field level exactly, the observa- oles needing to be added and deleted were found by Kriging interpolation method and observation boreholes optimization alternatives were proposed. On the basis of simulating and forecasting groundwater level information of the coming 2 years by numerical simulation software Visual Modflow, the level monito- ring boreholes needing to be improved were analyzed according to the average forecasting level gradient and the maximum level difference of wet and dry seasons, thus the best groundwater level performance monito- ring borehole net optimization scheme was determined： filling performance monitoring borehole ckl09 and adding performance monitoring boreholes nl, n2, n3. Finally the optimization scheme was inspected by Kriging cross-validation and the result shows that the improved groundwater performance monitoring bore- hole net can reflect zroundwater level information more accurately.