Where there is fog, there is the possibility of harvesting it to meet human needs. On the fringes of the Sahara desert, the Moroccan NGO Dar Si Hmad has constructed what is now the world’s largest fog harvesting system in the world. The system helps relieve severe water scarcity. Based on ancient water practices, the fog harvesting system uses a specific type of mesh that is suspended between two posts. The fog’s water drops get caught into the mesh and flow down into pipes. The water is then cleaned using UV light and sand filters.
The second-generation system uses a revolutionary fog-collection technology, the CloudFisher nets, designed by volunteer engineer Peter Trautwein of the Wasserstiftung Foundation(which also operates two similar projects, one in Eritrea and one in Ghana). The nets have proven to be twice as effective as the previous FogQuest nets, collecting an average of 22L / d m2 and require very little maintenance (for instance cleaning of gutters). These nets are also sturdier because they are backed by a hard plastic structure and can resist winds of up to 120km / h., following an extended experimental period at the site.
After the experimental period (November 2013-October 2015), the the German Federal Ministry for Economic Cooperation and Development (BMZ) is now funding the construction of 1,600 m² of CloudFisher nets to connect a total of 13 douars in Boutmezguida.
Text, Pictures and Videos taken from the Dar Si Hmad website. All rights reserved.