青岛李哥庄地下咸水体恢复方案的数值优化

海水入侵导致地下水变咸对青岛李哥庄地区经济发展产生了不利影响,急需开展治理该地区咸水体的工作。根据研究区已有的降雨、蒸发及水文地质等资料,结合现场调查和监测,利用地下水模拟软件Visual-MODFLOW中的SEAWAT模块建立了该地区的数值模型,并利用实测资料识别和验证了该模型参数,表明所建模型能反映李哥庄地区的实际水文地质条件。为了模拟研究区地下咸水体的恢复治理情况,提出了连续抽水、间歇式抽水和抽注水结合三种咸水恢复方案,并利用该模型对三种恢复方案进行了模拟优化。结果表明,抽取地下咸水只是咸水恢复的一个因素,周边淡水的驱替作用则是咸水恢复另一个的因素,抽注水结合恢复方案为三种方案中最优的方案。

Numerical Optimization of the Saline Groundwater Restoration Scheme in Ligezhuang Region of Qingdao

Seawater intrusion had a corrosive effect on economic growth in Ligezhuang region.We need to do the research of saline groundwater restoration scheme urgently.According to the existing information of rainfall,evaporation,groundwater mining and hydro-geological in Ligezhuang region,combining the situation of site investigation and monitoring,numerical model of this area was established by the variable density groundwater simulation software Visual-MODFLOW software SEAWAT modules.This model fits the reality situation very well by using monitoring dates to test and verify.Three saline groundwater restoration schemes were designed including wells continuous pumping scheme,wells intermittent pumping scheme and wells pumping-recharge scheme,and the model of this ares was used to simulate and optimize these schemes.Extraction of saline water is one factor of the saline groundwater restoration and the surrounding freshwater displacement is another one.Wells pumping-recharge scheme takes full advantage of these two factors to be the most optimized in three saline groundwater schemes.