The Sudans Nile within the Sudans has no significant tributaries. The amount of rainfall increases towards the south. In the north there is the very dry Nubian Desert; in the south there are swamps and rainforest. The Sudans’s rainy season lasts for about three months (July to September) in the north, and up to six months (June to November) in the south. The dry regions are plagued by sandstorms, known as haboob, which can completely block out the sun. In the northern and western semi-desert areas, people rely on the scant rainfall for basic agriculture and many are nomadic, travelling with their
Calansho Desert Calansho Desert Calansho Desert (Sarīr Kalanshiyū, Calansho Serir) is a desert in eastern Libya in Al Wahat District. It is part of the Sahara and has a hot desert climate (BWh). It is primarily rocky in the north and center, but forms part of the "Great Sand Sea" to the east and contains the Calanshio Sand Sea to the south. As Sarīr is the only settlement in the Sarīr Kalanshiyū. The Sarir oil field is located in the western Sarīr Kalanshiyū. It is currently thought that the ancestral Nile flowed through what is now the Calansho Desert during the Miocene.