Environmental Engineering Reference
In-Depth Information
FIGURE 20.2
Aerial.photograph.of.TERF.constructed.upon.disused.Tailings.Dam.No..1.at.Stawell.Gold.Mine.
and.showing.vegetation.on.plots.
Perforated.PVC.pipes.were.laid.at.the.base.of.TERF.before.illing.to.allow.col-
lection.of.drainage.water.and.to.speed.the.time.of.drying.of.the.tailings.ill..
Experimental.plots.were.created.from.September.2002.when.the.surface.of.
the.tailings.had.suficiently.consolidated.to.enable.the.use.of.earth-moving.
machinery.
Methods
Rehabilitation Strategies
The.focus.of.experimentation.was.the.development.of.rehabilitation.proto-
cols.that.would
•. Provide. a. self-sustaining. vegetation. cover. that. would. stabilize. the.
TSF.surface.by.preventing.wind.and.stream.erosion
•. Inhibit. rapid. sulide. oxidation. and. release. to. the. environment. of.
AMD.containing.dissolved.arsenic.or.heavy.metals
•. Provide.for.one,.or.more,.end-uses.for.the.rehabilitated.TSF.that.were.
sustainable. and. able. to. provide. a. potential. economic. beneit. that.
could.offset.future.costs.of.land.management
•. Yield.a.rehabilitated.TSF.that.is.more.utilitarian,.easier.to.construct,.
and.more.cost-effective.than.the.originally.proscribed.impermeable.
cover
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