Processing Modflow在黄土类地层综合降水试验中的应用

Application of Processing Modflow in Integrated Dewatering Test of Loessal Area

南水北调中线某工程连接明渠长约5 km,位于黄土丘陵区,为深挖方渠道。最高原始地下水位高出渠底约30 m,为准确计算试验区降水井的水位和优化降水方案,利用Processing Modflow软件在生产型群井降水试验区第二阶段建立降水模型,并用现场实际观测资料率定了数值模型,模型的拟合结果符合实际。通过不断调整降水井布置,超前综合降水,达到优化设计、提高功效、加快施工进度的目的。

The connecting channel of one project in Median-line South-to-North Water Trausfer Project,being about 5 KM long and located in hilly area of loess,is a deeply excavated channel.The maximum level of original underground water is about 30 meters higher than the bottom of the channel.In order to accurately calculate the groundwater level of dewatering well in test area and optimize the dewatering scheme,Processing Modflow is applied to establish the dewatering model in the second stage of the dewatering test area of production wells.The model is established after comparison to the actual data observed at the site,and the fitted result is in accordance with fact.The design is optimized,the efficiency is improved,and the construction progress is accelerated by the continuous adjustment for the scheme of dewatering well arrangement and scheme of integrated dewatering ahead of time.