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Here we report on a 25-year long-term sequence of measures to
return a deteriorated recreational urban lake, Alte Donau in Vienna
to acceptable water quality. Metropolitan waters require focused
ecosystem management plans and intensive in-lake efforts. We
explored physico-chemical conditions, food web from viruses to fish
and water birds, the sediments, the littoral zone and the
catchment, management and urban planning, and global warming.
Several restoration techniques were tested and critically
evaluated. The final management plan was based on bi-stable theory.
During the recovery phase, numerous surplus adjustments had to be
implemented to secure sustainable achievement.
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Nadine Gordimer
Paperback
(2)
R398
R330
Discovery Miles 3 300
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