EFFECT OF VERTICAL BARRIERS ON HYDRODYNAMIC CONTROL OF CONTAMINATED GROUNDWATER
To determine the influence of vertical barriers on the hydrodynamic control of contaminated groundwater and guide the design and construction of hydrodynamic interception technology,a hydrodynamic interception technology test device was established,and tests were carried out under different working conditions.Combined with the simulation results of GMS,it was found that the existence of an upstream open vertical barrier could form a large range of pollutant capture areas near the downstream pollution source,thus delaying the diffusion of pollutants and reducing the peak concentration of pollutants at the downstream monitoring point.The longer the arc length of the upstream open vertical barrier,the better the interception effect.The interception effect of the upstream pumping scheme was directly related to the pumped flow.The higher the pumped flow,the larger the range of the captured area formed in the middle reach,the slower the diffusion of pollutants,and the lower the peak concentration.The combination of vertical barriers and upstream pumping wells could very effectively reduce the pumping flow necessary to control the diffusion of pollutants,thus greatly reducing the implementation cost of the upstream pumping scheme.
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