The Lake Katam is one of the larger lakes in Ounianga Kebir, a lake system in the

Borkou-Ennedi-Tibesti Region The Borkou-Ennedi-Tibesti (BET) was until 2008 one of the then 18 regions of Chad, its capital being Faya-Largeau. It comprised the former Borkou-Ennedi-Tibesti Prefecture. Most of the region was part of the Sahara desert. In 2008, this region w ...

in the north-east basin of Chad. These lakes are notable for their running in the north–south headlands, by the

Trade wind The trade winds or easterlies are the permanent east-to-west prevailing winds that flow in the Earth's equatorial region. The trade winds blow mainly from the northeast in the Northern Hemisphere and from the southeast in the Southern Hemisph ...

are formed. They are the remnant of a much larger lake, that filled the basin during the so-called green Sahara-time, which lasted from about BC 10000–1500.

See also