A record decline in the water level at Huguangyan's volcanic
lake in Guangdong has raised concern that the sleeping volcano is
about to have a wake-up call.
At 2.3 square kilometers, Huguangyan is the world's largest
volcanic lake. It is located in the southwest city of
Zhanjiang.
It has recorded its lowest water level in 10 years and during
the second half of 2006, the level dropped 5 meters.
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The phenomenon, however, should not be a cause for worry, said
Chen Quan, the director of Zhanjiang's seismology bureau. He ruled
out the possibility of an eruption.
"Our observation has not shown any abnormal sign indicating that
a re-eruption will occur at Huguangyan," said Chen.
Evolved from an extinct volcano centuries ago, the lake
experienced a dramatic reduction in water during the second half of
2006 when the level fell 5 meters to reach 13 meters.
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Luo Shuwen, senior engineer from Guangdong geological
prospecting bureau, said Huguangyan's water level drop was due
mainly to a decline in rainfall last year.
Luo said that between September and December alone,
precipitation around Huguangyan was just 231.0 millimeters while
the evaporation was as high as 445.3 millimeters.
"Water supply therefore lagged far behind water loss," Luo
said.
He added that there were other reasons for the problem.
"Working entities around Huguangyan kept pumping water from the
lake which also caused Huguangyan's water level to decline," Luo
said.
Scientists with Zhanjiang meteorological bureau agreed that
there was no need for people to worry.
Officials at the scenic spot have been trying to deal with the
issue. They have submitted proposals to Zhanjiang's municipal
government to preserve Asia's only Maar lake.
The first idea seeks to pump water from a well into the lake
while another calls for a restriction on pumping water out of
Huguangyan.
Experts who have been doing research on Huguangyan Maar lake for
many years agreed that working entities that use water from
Huguangyan should be restricted. They also say that pumping in
water from other lakes was not feasible.
The lake's deposits can provide thousands of years of
information about the earth and it is commonly referred to as
"earth's yearbook."
(China Daily April 3, 2007)
