| 摘要 |
Induced hydraulic intragardient system for, and method of preventing flow migration of liquid leachate from, a secure landfill arrangement, which contemplates a low permeability inner primary liner for confining liquid leachate containing waste material landfill and a low permeability outer secondary liner for separating the arrangement from the surrounding subsurface formation thereat, and an intermediate permeable piezometric pressure blanket separating the liners from each other, plus a supply mechanism for supplying sufficient control liquid, e.g. potable water, to the pressure blanket to maintain its piezometric pressure head or level higher than that of any leachate accumulation in the waste material confined within the inner liner, for induced hydraulic intragradient counterflow migration of control liquid from the pressure blanket inwardly through the inner liner, whereby to prevent flow migration of such leachate outwardly through the inner liner and in turn to and through the outer liner to the surrounding subsurface formation.
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