摘要
为了解决傍河地下水污染问题,在通州某水系新建傍河污染地下水立体循环修复示范工程。利用GMS软件中的Modflow模块和RT3D模块建立地下水流-溶质运移耦合模型,预测不同工况下地下水水质修复效果。模拟显示:在开挖河道不减渗立体循环水量10000m^(3)/d的工况下,10年后其沿岸地下水氨氮质量浓度由Ⅴ类降到Ⅲ类,局部为Ⅱ类;在减渗条件下,自然入渗量仅为2000m^(3)/d,无法形成地下水立体循环,10年后其沿岸地下水氨氮质量浓度为Ⅳ类,局部仍为Ⅴ类。因此,开挖河道河床不采用黏土减渗,傍河污染地下水抽出-自然入渗可形成立体循环,水质修复效果显著。
To solve the problem of groundwater pollution along the rivers,a stereoscopic remediation demonstration project is built in a water system in Tongzhou of Beijing,China.The Modflow module and GMS software module RT3 Dare used to establish a coupling model for groundwater flow and solute transport to predict the effect of groundwater remediation under different conditions.The simulation results show that,the mass concentration of ammonia nitrogen in the groundwater along the river decreased from class V to class III,and locally to class II under the condition of 10,000 m^(3)of water volume per day.Likewise,the natural infiltration per day is only 2000 m^(3)under the condition of seepage reduction,which can not form the stereoscopic circulation of groundwater.Ten years later,the mass concentration of ammonia nitrogen in the groundwater along the river is class IV,and locally is class V.The results show that the excavation of the river bed does not use clay to reduce seepage,and the pumping and natural infiltration of polluted groundwater near the river can form a stereoscopic circulation,and the effect of water remediation is significant.
作者
刘培斌
辛小春
姚旭初
侯树楷
王彪
袁鸿鹄
LIU Peibin;XIN Xiaochun;YAO Xuchu;HOU Shukai;WANG Biao;YUAN Honghu(Beijing Institute of Water,Beijing 100048,China;Miyun Emergency Management Bureau,Beijing 101500,China)
出处
《南水北调与水利科技（中英文）》
CAS
北大核心
2021年第2期301-316,341,共17页
South-to-North Water Transfers and Water Science & Technology
基金
国家科技重大专项课题(2017ZX07101004)
北京市科技计划课题(Z161100004516015)
北京市自然科学基金项目(Z160001)。
关键词
地下水
数值模拟
水力调控
立体循环修复
氨氮
groundwater
numerical simulation
hydraulic regulation
stereoscopic remediation
ammonia nitrogen
