Sun, Nov 02, 2008 - Page 6 News List

FEATURE : Senegal fights creeping desert with green wall


A blackwood sapling (Acacia senegalensis), grows in a shallow trench on Sept. 18 in Widou Thiengoly, Senegal. Senegalese rangers have planted blackwood trees as part of an ambitious project to combat desertification.


The idea was simple, ambitious and eye-catching: To counter the threat of creeping desertification in Africa with a Great Green Wall of trees spanning the continent.

From Senegal in the west to Djibouti in the Horn of Africa in the east, it would be 7,000km long and seek to halt or reverse the encroachment of deserts threatening the livelihoods of tens of millions. Some estimates say up to one-third of Africa’s surface area is at risk.

Senegal’s share of the wall is around 760,000 hectares stretching some 543km in length.

Sadly, the wall still has a long way to go before it can even come close to achieving its objectives.

The country started planting in 2005, but today it is easy to pass by the tiny trees without even noticing them.

In the savanna of the Sahel region at Ferlo in the north, the countryside is covered in pale green foliage at the end of the rainy season.

“Is that the Great Green Wall that the President [Abdoulaye] Wade talks about all over the world?” a Dakar-based driver asks, failing to hide his disappointment at the first patch of shrubs.

Senegal’s Great Green Wall is not yet a wall and not yet great. In fact it is better described as a series of patches.

In Widoy Thiengoly, the wall is made up of a string of ditches where small shoots of gum trees and date palms are planted. The biggest shoots, planted in 2005, are no more than knee-high.

“In a zone with less than three months of rains you cannot expect spectacular results. These gum trees do not need extra water, they develop their extensive root system first and grow taller very slowly,” said Lieutenant Almamy Diarra of the water and forest service.

“These are trees that support drought very well — in the dry season they shed their leaves to prevent the loss of water,” he said.

The trees are also very well suited to stopping desertification.

Their roots “fix the soil layers and facilitate water infiltration and this creates a microclimate that allows other plants to settle in the same area,” he said.

Statistics in hand, another department official, Souleymane Ndoye, said they replanted 300 hectares in 2005, 400 hectares in 2006 and 675 hectares last year.

“This year the goal was to have 5,000 hectares reforested. With God’s help we planted 5,230,” he said.

“At the moment Senegal does not have the financial means to finish its part of the wall,” Diarra said. “The Great Wall is still tiny.”

The wall project has provided jobs for the village’s young men in the tree nursery, said Kadio Ka, the female chief of the village and a mother of eight.

“When those gum trees mature the whole village will profit from them,” she said.

But ranger Ndoye warns that the villagers will have to be patient.

“Reforestation over a 543km area in Senegal will take several generations,” he said.

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