INVENTORY OF TRADITIONAL KNOWLEDGE TO COMBAT DESERTIFICATION

PHOTOGRAPHICAL INVENTORY

A2 - SURFACES AND STONE ARRANGEMENTS
Algerian Sahara. The barrows and the stone arrangements disseminated all over the Sahara refer to a prehistoric civilisation based on the capability of catching the quantity of water contained in the atmosphere which in the presence of colder stone masses condenses and is retained in the soil.
Prehistoric mausoleum near the oasis of Janet (Tassili n'Ajjer, Algerian Sahara). These complex monuments, called solar tombs and made out of concentric rings, can be interpreted as dew harvesting systems.
Algerian Sahara. The barrows and the stone arrangements disseminated all over the Sahara refer to a prehistoric civilisation based on the capability of catching the quantity of water contained in the atmosphere which in the presence of colder stone masses condenses and is retained in the soil.
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SURFACES AND STONE ARRANGEMENTS
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INVENTORY OF TRADITIONAL KNOWLEDGE TO COMBAT DESERTIFICATION