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��Home>>China Observer
Three Gorges causing pollution in Yangtze River is "groundless", expert
www.chinanews.cn 2007-06-05 17:28:42
Chinanews, Beijing, June 5 �C Lu Youmei, an academician from the Chinese
Academy of Engineering and chairman of the China Three Gorges Dam
Committee, recently said there was no scientific evidence to prove that
the Three Gorges Dam project was attributable to the pollution in the
Yangtze River.
He said that recently, there was a report alleging that the Three Gorges
Dam project had caused some problems to the environment and river
harnessing in the middle and lower reaches of the Yangtze River. The
report says that pollutants in the Three Gorges Dam are not effectively
handled, that since water was injected into the Three Gorges Dam, the
water flowing speed nearby has slowed down, thus causing water in this
area unable to disperse the pollutants. Although such condition might not
lead to eutrophication in the mainstream, still during the spring and
summer seasons, large areas of blue-green algae will gather in and near
the Three Gorges Dam, the report claims.
Faced with this claim, Lu says that in the recent year, the urbanization
and industrialization process has quickened in the Yangtze River area. As
a result, the environmental loading ratio in the Yangtze River is far
above the national average ratio. Some people blame the Three Gorges Dam
project for the degradation of water quality in the Yangtze River. Such
allegation is groundless since there is no scientific evidence to back
them up. If we build any dams near the river, the construction project
will affect the water quality nearby. Some people keep saying that this
is one of the shortcomings of the Three Gorges Dam project. However, the
real situation is just the opposite, the scientist said.
At present, China has exploited only a small part of its water resources.
By the end of 2005, China only exploited only 110 million kilowatts of
water resources. The amount of electricity they generated accounted for
only 20% of the potential electricity they could be exploited. And such
percentage point was far below the average exploitation rate compared
with some developed countries. China has not overly exploited its water
resources and it is unrealistic and unreasonable to require China to stop
exploiting its water resources, Lu said.
China's water resources can generate about 680 million kilowatts of
electricity in total. With current technological equipment, about 400
million kilowatts of electricity can be produced. If China's water
resource exploitation can really reach this practical goal, it will mean
that China will have saved 800 million tons of coal resources every year.
However, under current situation, electricity generated by water accounts
for only 36.5% of the total. At present, most large and medium hydropower
plants in China have a total installation capacity of 50,000 kilowatts
each. Through the past 50 years, China has built 226 such large and
medium hydropower plants. Among them, 41 are gigantic hydropower plants
with a total installation capacity of over one million kilowatts each and
66 are large ones with a total installation capacity of 500,000 kilowatts
each. By the end of 2005, there were 173 hydropower plants being built
across China, with their dams all above 30 meters. When put into
operation, they will produce 93 million kilowatts of hydroelectricity.
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