Moroccan Villagers Harvest Fog for Water Supply

Green technology to turn fog into fresh water straight from the tap has put an end to exhausting daily treks to distant wells by village women in southwest Morocco

Families in five highland Berber communities have begun to benefit from "fog harvesting", a technique devised in Chile two decades ago and since taken up in countries from Peru to Namibia and South Africa.

On the summit of a mountain named Boutmezguida, which looms over the villages at 1,225 metres (4,019 feet), thick fog shrouds about 40 finely meshed panels designed to trap water and relay it to a network of pipes.

To have water running from a faucet at home is a "revolution" for inhabitants of the semi-arid mountains known as the Anti-Atlas, says Aissa Derhem, the chairman of an active regional association called Dar Si Hmad for Development, Education and Culture (DSH).

DSH prides itself on building "the world's largest fog-collection and distribution system" and helping locals in the Sidi Ifni region—Derhem's birthplace—to learn to operate it, after repeated droughts and scarce rain.

"Our rain here is the fog," Derhem adds.

Tiny droplets are caught on the mesh while fog wafts through panels. The harvesters mix all they catch with more water derived from drilling, then supply the villages on the lower slopes.

Derhem first heard about fog harvesting 20 years ago. A few years later on returning to Sidi Ifni, he realised that the local climate was similar to that of the Andes in South America.

DSH joined forces with Fog Quest, a Canadian charity whose volunteers work in a range of developing countries. North Africa's first pilot project became operational after almost a decade's work refining techniques.

'An imitation of nature'

The valves were opened at Sidi Ifni for the first time to mark World Water Day, March 22. Ever since, "92 households, or nearly 400 people," have enjoyed running water at home, says Mounir Abbar, the project's technical manager.

"Morocco has a lot of fog because of three phenomena: the presence of an anticyclone from the Azores (north Atlantic islands), a cold air current and a mountainous obstacle," Derhem says.

The mesh that traps water is "merely an imitation of nature," he adds, pointing out how spiders have always caught minute droplets of water in their webs.

Source: Phys.org

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Taxonomy

• Atmospheric Water Generator
• Environment
• Water Supply