文章摘要
张帅,王旭升,姜永海,杨昱.双井抽灌处理地下水污染的回收率理论公式[J].水利学报,2020,51(5):589-596
双井抽灌处理地下水污染的回收率理论公式
Theoretical equation of recovery ratio for treatment on groundwater contamination with paired wells of extraction-injection
投稿时间:2019-10-27  
DOI:10.13243/j.cnki.slxb.20190750
中文关键词: 地下水污染  抽出处理法  地下水侧向径流  去除率  流函数
英文关键词: Groundwater population  Pump and treat method  Lateral groundwater flow  removal rate  Stream function
基金项目:国家自然科学基金项目(41772249)
作者单位E-mail
张帅 中国地质大学(北京), 水资源与环境工程北京市重点实验室, 北京 100083  
王旭升 中国地质大学(北京), 水资源与环境工程北京市重点实验室, 北京 100083 wxsh@cugb.edu.cn 
姜永海 中国环境科学研究院, 国家环境保护地下水污染模拟与控制重点实验室, 北京 100012  
杨昱 中国环境科学研究院, 国家环境保护地下水污染模拟与控制重点实验室, 北京 100012  
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中文摘要:
      采用抽出处理法修复地下水污染场地需要有一定的回收率,以达到充分净化的目标。当地下水存在侧向径流时,抽出处理法的回收率不一定能够达到100%。对于"一抽一灌"双井单元,井孔扰动下的地下水稳定流场可分为内循环区、外循环区和非循环区,某些情况下内循环区或外循环区不存在。由内循环区的水动力学特性得到回收率的理论公式和变化曲线。回收率取决于地下水侧向径流的方向和相对强度,随抽水流量的增大而增加。回收率公式可用于抽出处理法的井孔设计,地下水污染物的目标去除率越高,所需要的回收率越大。针对北京某试验场,应用该方法进行了回收率优化评估。
英文摘要:
      A certain level of recovery ratio has to be achieved in the remediation of groundwater contamina-tion with pump and treat method, for the goal of adequate cleaning. When a lateral groundwater flow exists, the recovery ratio of the pump and treat system would not always reach to 100%. For the well pair of "one pumping one injecting", the steady state groundwater flow field disturbed by the wells could be divid-ed into several zones:the inner circulation zone, the outer circulation zone and the non-circulation zone. In some cases the inner or outer circulation zone does not exist. The theoretical equation and curves of recov-ery ratio are obtained according to the hydraulic properties of the inner circulation zone. The recovery ratio is subject to the direction and relative rate of the lateral groundwater flow, increasing with the increase in the pumping rate. The recovery ratio equation can be used for the well pair design in the pump and treat system. Higher removal rate is required for groundwater contamination remediation, larger recovery ratio is needed. The method is used at an experimental site in Beijing to optimize the recovery ratio.
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