Это вообще интересное место оказалось: http://en.wikipedia.org/wiki/Kufra
Крупный центр работорговли, между прочим.
А вот и про круги: At the beginning of the '70s, Libya launched in Kufra a great cultivation project aimed at developing agriculture in the desert. Irrigation is provided by fossil water beneath the ground surface, i.e. non-renewable source, and it is the only accessible water resource in the area. Rotors (high sprinkler that rotates) provide irrigation and the obtained circles have a diameter af about 1 km and can be observed from the space.
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branchandroot
(no subject)
Date: 2008-01-27 05:14 pm (UTC)Крупный центр работорговли, между прочим.
А вот и про круги: At the beginning of the '70s, Libya launched in Kufra a great cultivation project aimed at developing agriculture in the desert. Irrigation is provided by fossil water beneath the ground surface, i.e. non-renewable source, and it is the only accessible water resource in the area. Rotors (high sprinkler that rotates) provide irrigation and the obtained circles have a diameter af about 1 km and can be observed from the space.