| 摘要 |
A method and system for collecting and containing leachate from a landifll uses a submerged drainage sink (2) to develop a flow pattern towards the drainage sink (2) contained within a containment zone, and therefore minimizes the chance of contaminating area groundwater. In a first embodiment of the invention for use in a substantially flat area, a perimeter barrier wall (1) is provided and extends downward into a bottom barrier layer, such as an aquitard (10), a clay layer, or a synthetic material. In another embodiment for use at a valley fill site, groundwater ridges (27), an upward flow pattern beneath the valley floor (40), and a barrier wall (1) crossing the valley floor (40) along the lowest edge of the landfill form a containment zone to contain a drainage sink comprising a blanket drain (12) and a plurality of trench drains (17, 43).
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