| 摘要 |
<p>A system is described for achieving hydraulic containment and remediation of water table contaminant plumes, based upon pumping from groundwater and recycling extracted water through the root zone, rhizosphere and/or vadose zone by surface and/or subterranean infiltration, which system comprises: (1) one or more extraction wells to allow pumping of contaminated groundwater to the surface and to create a cone of depression in the saturated zone, (2) a surface and/or subterranean infiltration gallery to reinject the pumped groundwater, and to irrigate the vegetation, (3) a zone or stand of vegetation (dryland or wetland) to provide for ultimate water removal from the soil column by evapotranspiration thereby allowing a cone of depression to be maintained in the saturated zone, (4) a vertical reflux where excess water, not taken up by plants infiltrates back to groundwater and (5) a potential reaction zone in (a) the root zone/rhizosphere where enhancement to indigenous microbial degradation of groundwater contaminants may occur, or below the root zone where infiltration may enhance physical/chemical/microbial disappearance of groundwater.</p> |
