3/30/15, "The Price of Damming Tibet’s Rivers," NY Times Op-ed, Michael Buckley, New Delhi
"CHINA has more than 26,000 large dams, more than the rest of the world combined. They feed its insatiable demand for energy and supply water for mining, manufacturing and agriculture.
In
2011, when China was already generating more than a fifth of the total
hydropower in the world, the leadership announced that it would aim to
double the country’s hydropower capacity within a decade, so as to
reduce its heavy dependency on coal-fired power plants. Since the
waterways of mainland China are already packed with dams, this new
hydropower output could come from only one place: the rivers of Tibet.
Rivers
gushing through deep canyons at the edges of the Tibetan plateau hold
the highest hydropower potential in the world. The headwaters of seven
major rivers are in Tibet: They flow into the world’s largest deltas and
spread in an arc across Asia.
Two
of the continent’s wildest rivers have their sources in Tibet: the
Salween and the Brahmaputra.
Though they are under threat from
retreating glaciers, a more immediate concern is Chinese engineering
plans. A cascade of five large dams is planned for both the Salween,
which now flows freely, and the Brahmaputra, where one dam is already
operational.
The
damming does not benefit those who live in Tibet. The energy generated
is transferred to power-hungry industrial cities farther east. Tibetans
are forcibly deprived of their land; protests against hydropower
projects are prohibited or violently dispersed.
Even
more alarming are projects to divert the waters of Tibet’s rivers for
use in mines, factories and other industries. At the eastern edge of
Tibet, a planned mega-diversion from south to north would move water
from the Yangtze to the Yellow, China’s two greatest rivers. Other plans
call for diversion of water from the Brahmaputra, Salween and Mekong —
all rivers that cross national boundaries. Including China itself, up to
two billion people downstream from Tibet depend on these rivers.
Damming and diverting them will have a severe impact on their lives and
environment, especially when you consider that rice and wheat require
water-intensive cultivation.
Rivers
support entire ecosystems. They carry tons of nutrient-rich silt
downstream, a cocktail of elements needed for growing plants: nitrogen,
phosphorus, potassium, magnesium and calcium. Silt is essential for
agriculture and for bolstering the deltas against rising sea levels.
Dams block silt, and they block fish migration. The Yangtze is China’s
biggest freshwater fishery, but since the Three Gorges Dam that spans it
was completed in 2012, the downstream population of carp has fallen by
90 percent, according to Guo Qiaoyu of the Nature Conservancy in
Beijing.
Vietnam,
Cambodia and Bangladesh heavily depend on rivers sourced in Tibet. More
than 60 percent of Cambodia’s annual fish catch derives from Tonle Sap,
a lake that is replenished by the annual flooding of the Mekong. Over
the last decade, as new Chinese dams have come online on the Mekong, the
fish catch has plummeted. The waters rise and fall at the whim of
Chinese engineers.
Then
there are the direct human costs of damming and diverting: Whole
communities must be relocated from areas flooded by a reservoir. They
are often shifted to degraded land, where they live in poverty or have
to relocate once again. By some estimates, hydropower projects have
forced some 22 million Chinese to migrate since the 1950s.
In
Tibet, since the 1990s, at least a million nomads and farmers — a sixth
of the population — have been relocated from grasslands to make way for
mining ventures and hydropower projects. These “ecological refugees”
are shunted into ghettos. Moreover, China claims complete sovereignty
over Tibet’s rivers, oblivious to protest from Tibetans and from the
people downstream.
The
United Nations has done too little, too late. In 2014, the Watercourses
Convention came into effect, spelling out guidelines for transboundary
water sharing, but it is nonbinding. More to the point, China is not a
signatory — and neither are most nations of South Asia.
This
will end badly for the nations downstream from Tibet, which are
competing for scarce water. Damming and water diversion could also end
badly for China, by destroying the sources of the Yangtze and Yellow
Rivers.
The
solution to these complex problems is simple: Since these enormous
projects are state-run and state-financed, China’s leaders can cancel
them at will. Though campaigns by Chinese environmentalists have stopped
some dam projects, the pro-dam lobby, backed by Chinese consortiums, is
powerful. There are alternatives to disrupting the rivers: China has
made great investments in solar and wind power, but has not
significantly deployed them in Tibet.
China’s
leaders need to consider the costs of forging ahead with these
projects. The health of these rivers is of vital concern to all of Asia."
"Michael Buckley
is the author of “Meltdown in Tibet: China’s Reckless Destruction of
Ecosystems From the Highlands of Tibet to the Deltas of Asia.”
A version of this op-ed appears in print on March 31, 2015, on page A25 of the New York edition."...via Lucianne
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