【摘要】 选择北运河流域土沟段于2016年开展为期69 d的水力截获试验。结果表明:20 m含水层降深为2 m,影响半径为80.2 m;60 m含水层降深为1.54 m,影响半径为150.6 m。试验期间,多数地下水水质指标浓度呈下降趋势,其中硫酸盐浓度下降幅度达57.9%,痕量有机污染物—邻苯二甲酸(2-乙基己基)酯的最大下降幅度达96.3%。污染物浓度的变化与其所在含水层介质中发生的稀释作用、阳离子交换吸附及黏土矿物的吸附作用等密不可分。试验结果表明水力截获试验可有效控制和修复地下水污染。更多还原

【Abstract】 A 69-day hydraulic capture test was conducted in Tugou section of the Beiyun River Basin.The results showed that the groundwater level drawdown and influence radius of 20 m aquifers were 2 m and 80.2 m,while those of 60 m aquifers were 1.54 m and 150.6 m.During the test period,the concentration of most groundwater quality indicators showed a downward trend,of which sulfate concentration decreased by 57.9%,and the concentration of trace organic pollutant,phthalate ester(2-ethylhexyl),decreased by 96.3%.The change of pollutant concentration was closely related to dilution,cation exchange adsorption and clay mineral adsorption in aquifer media.The test results show that the hydraulic capture test can effectively control and remedy groundwater pollution.更多还原