Thursday, July 19, 2007
Vast Buried "Fossil Lake" Reported in Darfur

Vast Buried "Fossil Lake" Reported in Darfur
Dan Morrison in Cairo, Egypt for National Geographic News
July 19, 2007

Deep beneath the desert and scrub of northern Darfur, Sudan, lies a
vast hidden cache of water, experts said this week. The newfound
aquifer could turn the arid conflict zone into a broad oasis of farms
and watering holes, according to Farouk El-Baz, director of Boston
University's Center for Remote Sensing.
In April El-Baz's team had announced that they had found signs of a
huge ancient lake in Darfur. At that time they had speculated that the
long-gone lake's water may be lurking underground.
After further testing, El-Baz said, "we know there's water." However,
"we don't yet know how much," said El-Baz, an Egyptian-born pioneer of
using satellite imagery in geological and archaeological research. El-
Baz's team found the underground pool by analyzing infrared, radar,
and other images taken by satellites.


Slim Promise of Peace?


Desertification and competition for natural resources are among the
underlying causes of the recent Darfur conflict. More than 200,000
people have been killed and 2.5 million others chased from their homes
during the four-year strife.


So if there is enough water, "it could change the course of events in
that region," El-Baz said.
"You could have mechanized farms there to feed and provide training
and jobs to the people there." The Sahara desert's steady creep into
Sudan's western region could also be stopped, El-Baz said.


But a French researcher who has also scanned the region using
satellite imagery said the underground water is unlikely to be
significant. "I hope that they find water," said Alain Gachet of Radar
Technologies France. "But I am scientifically convinced that they
can't in this context." Ancient Lake El-Baz said that the ancient lake
once covered much of the state of North Darfur and was about the size
of Massachusetts.


While that lake is now dry, much of its water likely seeped into
deposits of sandstone located hundreds of feet under the Earth's
surface, he said, and could be pumped to the surface for wells and
irrigation.


But Gachet countered that, while there may be isolated patches of
water-rich sandstone in North Darfur, they are not enough to produce
the quantities of water that El-Baz is predicting.
"I am very skeptical of the potential of this lake," Gachet said.


Gachet has mapped most of Darfur's freshwater resources as part of a
relief project sponsored by the U.S. State Department. In 2006 he
provided aid groups with a detailed atlas of rain-fed underground
streams that could be tapped for fresh water. Seventy-five wells have
been dug so far.


Using ground-penetrating radar, "we peeled Darfur like an onion,"
Gachet said. "There is enough fresh water to sustain three or four
million people." In just a few months El-Baz and Gachet will both have
a chance to see who's right. The Egyptian ministry of water and
irrigation has agreed to fund 20 initial test wells. The United
Nations Mission in the Sudan has agreed to drill four.


In time, as many as a thousand wells could be pulling water from
Darfur deserts, said El-Baz, who traveled to Sudan last month to
discuss the find with Sudanese President Omar Al-Bashir.
Water Alone Won't Heal Today's Sahara, an arid abode of sand dunes and
fossils, was a much wetter environment 5,000 years ago. Desert cliff
drawings from that time depict giraffes, elephants, and hippos.
Much of the water that fed that ecosystem seeped through layers of
sandstone to form "fossil water"--nonrenewable aquifers dating from
5,000 to 10,000 years ago.


Agricultural projects harnessing fossil water have been successful in
several places. The world's biggest effort to reclaim such deposits,
for example, is the Great Man-Made River in Libya.
There, 1,500 wells pump as much as 1.7 billion gallons (6.5 million
cubic meters) of fresh water each day from the Sahara to cities on the
Mediterranean coast.


And 500 wells now provide fossil water to irrigate 100,000 acres
(40,470 hectares) of farmland in the former desert of Sharq el-Oweinat
in southwestern Egypt. North Darfur could become another Sharq el-
Oweinat, El-Baz said.


There are likely several more underground lakes to be found under the
deserts of North Africa, he added. "We are scanning the whole of the
eastern Sahara," he said. "There are several similar depressions we
haven't yet analyzed." But even if northern Darfur were to become rich
in water, many other factors are likely to prolong the violence there,
analysts said.


Since then, the three original main rebel alliances have cracked into
more than a dozen groups, further frustrating efforts to negotiate an
end to the conflict.
Much of the underground lake that El-Baz has described now lies in
rebel-held territory.
"What you see is not simply a competition for the scarce resources of
Darfur," Eric Reeves, a leading Darfur researcher and activist, told
the Boston Globe.


"If we want to look at the violence in Darfur, we don't look
underground, we look at the political realities that exist today.''


Posted by lmurx at 2:53 PM


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