Climate

Geography

The Republic of Sudan is on the south-eastern border of Egypt, and lies on the western shore of the Red Sea. There are four main features of the physical geography. The whole eastern half of Darfur is covered with plains and low hills of sandy soils, known as goz, and sandstone hills. In many places the goz is waterless and can only be inhabited where there are water reservoirs or deep boreholes. While dry, goz may also support rich pasture and arable land. To the north the goz is overtaken by the desert sands of the Sahara. A second feature are the wadis, which range from seasonal watercourses that flood only occasionally during the wet season to large wadis that flood for most of the rains and flow from western Darfur hundreds of miles west to Lake Chad. Many wadis have pans of alluvium with rich soil that are also difficult to cultivate. Western Darfur is dominated by the third feature, basement rock, sometimes covered with a thin layer of sandy soil. Basement rock is too infertile to be farmed, but provides sporadic forest cover that can be grazed by animals. The fourth and final feature are the Marrah Mountains, volcanic plugs created by a massif, that rise up to a peak at Deriba crater where there is a small area of temperate climate, high rainfall and permanent springs of water.

Remote sensing has detected the imprint of a vast underground lake under Darfur. The potential water deposits are estimated at . The lake, during epochs when the region was more humid, would have contained about 607 cubic miles of water. It may have dried up thousands of years ago.

History

main: History of Darfur

Darfur is conjectured to have been part of the Urheimat of the Proto-Afro-Asiatic language in distant prehistoric times (c. 10,000 BC), though there are numerous other theories that exclude Darfur.

Most of the region is a semi-arid plain and thus insufficient for supporting a large and complex civilization. While the Marrah Mountains offer plentiful water, the Daju people created the first known Darfurian civilization based in the mountains, though they left no records beside a list of kings. The Tunjur displaced the Daju in the fourteenth century and introduced Islam. The Tunjur sultans intermarried with the Fur and sultan M. Solaiman (reigned c.1596 to c.1637) is considered the founder of the Keira dynasty. Darfur became a great power of the Sahel under the Keira dynasty, expanding its borders as far east as the Atbarah River and attracting immigrants from Bornu and Bagirmi. During the mid-18th century the country was wracked by conflict between rival factions, and external war with Sennar and Wadai. In 1875, the weakened kingdom was destroyed by the Egyptian ruler set up in Khartoum, largely through the machinations of Sebehr Rahma, a businessman who was competing with the dar over access to slaves and ivory in Bahr el Ghazal to the south of Darfur.