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Restoration of Degraded Rivers: Challenges, Issues and Experiences (Hardcover, 1998 ed.)
Loot Price: R5,868
Discovery Miles 58 680
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Restoration of Degraded Rivers: Challenges, Issues and Experiences (Hardcover, 1998 ed.)
Series: NATO Science Partnership Subseries: 2, 39
Expected to ship within 10 - 15 working days
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In the continued quest for increased economic benefits from our
water resources, numerous structures and operating policies for
controlling the river flow have been built and implemented. These
structures and associated operating policies can facilitate
navigation; they can provide greater quantities of reliable water
supplies to meet agricultural, industrial and municipal water
demands; they can generate hydroelectric power and energy; and they
can provide increased flood protection, recreation, and other
benefits. Over the past half-century we have converted many of our
rivers into engineered waterways. These straightened, often
periodically dredged, engineered rivers are complete with dikes,
reservoirs, weirs, and diversion canals. All this engineering has
enhanced economic development. However, as rivers and their
floodplains become stressed from the excessive use and misuse of
their resources, their contribution to economic development can be
threatened. Evidence of economic and ecological degradation,
especially in relatively large river systems such as the Danube,
the Mississippi, the Rhine, and the Volga, has increased our
appreciation of beneficial roles natural aquatic and terrestrial
ecosystems play in water quantity and quality management. We have
recognized the need to pay more attention to letting nature help us
regulate water quantity and quality rather than working against
nature and its variabilities and uncertainties. Today there are
efforts underway in many developed river basins to 'de engineer' or
return these straightened and controlled rivers to a more natural
state."
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