Tibesti massif include in Borkou region. The Tibesti massif lies in northern Chad, adjacent to the border with libya. The massif rises to over 3,000 m at several points, with peaks at Pic Tousside (3,315 m) and Emi Koussi (3,415 m). At a number of places in the massif there is conspicuous surface water, both in permanent pools (gueltas), found among the rocks and ravines, and also in the seasonal watercourses which flow following rain. Some of the wadis are bordered by Acacia spp. and elsewhere most areas are vegetated either with sparse scrub or annual grasses such as Cornulaca monacantha. The rainfall, such as it is, usually occurs between February and May, but is unpredictable both in timing and amount. The height of the Tibesti massif means that it receives rather more rainfall than neighbouring areas of the Sahara, but any reduction in rainfall will seriously affect the vegetation and water-bodies which are an important factor in maintaining the conservation value of the site.
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