Ouaddaï highlands

Ouaddaï Highlands is an area in east of Chad along the border with Sudan. The Ennedi Plateau and the Ouaddaï highlands in the east of Chad complete the image of a gradually sloping basin, which descends towards Lake Chad. There are also central highlands in the Guera region rising to 1,500 m (4,921 ft).

Water systems

Batha River is an important ephemeral river that carries water west from these highlands during rainy seasons, usually during flash flooding.[1]

The land

Ouaddaï highlands mark Chad's eastern border and also divide the Chad and Nile watersheds. These highland areas are part of the East Saharan montane xeric woodlands ecoregion.

Yellow Nile

The Yellow Nile is a former tributary that connected the Ouaddaï highlands of eastern Chad to the Nile River Valley ca. 8000 to ca. 1000 BCE.[2] Its remains are known as the Wadi Howar. The wadi passes through West Darfur near the northern border with Chad and meets up with the Nile near the southern point of the Great Bend.

Ouaddai Empire

The Ouaddai Empire (1635–1912) (Also Wadai Empire) was originally a non-Muslim kingdom, located to the east of Lake Chad in present-day Chad. It emerged in the sixteenth century as an offshoot of the Sultanate of Darfur (in present-day Sudan) to the northeast of the Kingdom of Baguirmi.

References

Country studies
Keding, B (2000). "New data on the Holocene occupation of the Wadi Howar region (Eastern Sahara/Sudan)." Studies in African Archaeology 7, 89–104.

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[1] Country studies

[2] Keding, B (2000). "New data on the Holocene occupation of the Wadi Howar region (Eastern Sahara/Sudan)." Studies in African Archaeology 7, 89–104.

Regions of Africa
Central	Guinea region Gulf of Guinea Cape Lopez Mayombe Igboland Mbaise Pool Malebo Congo Basin Chad Basin Cameroonian Highlands forests East Sudanian savanna Congolian rainforests Ouaddaï highlands Ennedi Plateau
East	African Great Lakes Albertine Rift East African Rift Great Rift Valley Gregory Rift Rift Valley lakes Virunga Mountains Kavirondo Zanj East African montane forests Eastern Arc Mountains Serengeti Horn of Africa Afar Triangle Al-Habash Barbaria Danakil Alps Danakil Desert Ethiopian Highlands Dahlak Archipelago Hanish Islands Gulf of Aden Gulf of Tadjoura Red Sea Indian Ocean islands Comoro Islands Lamu Archipelago Madagascar Central Highlands (Madagascar) Northern Highlands Zanzibar Archipelago Swahili coast
North	Eastern Desert Maghreb Ancient Libya Atlas Mountains Barbary Coast Bashmur Gibraltar Arc Ifriqiya Nile Valley Nile Delta Cataracts of the Nile Darfur Lower Egypt Lower Nubia Middle Egypt Nile Delta Nuba Mountains Nubia The Sudans Upper Egypt Tibesti Mountains Western Sahara
South	Rhodesia North South Thembuland Succulent Karoo Nama Karoo Bushveld Maputaland Highveld Fynbos Indian Ocean coastal belt Albany thickets Cape Floristic Region Skeleton Coast Kalahari Desert Okavango Delta Cape Peninsula False Bay
West	Pepper Coast Gold Coast Slave Coast Ivory Coast Cape Palmas Cape Mesurado Guinea region Guinean Forests of West Africa Upper Guinean forests Lower Guinean forests Guinean forest-savanna mosaic Guinea Highlands Gulf of Guinea Dahomey Gap Niger Basin Niger Delta Inner Niger Delta West Sudanian savanna Yorubaland
Macro-regions	Aethiopia Afromontane Arab world Commonwealth realm Equatorial Africa Françafrique Greater Middle East Guineo-Congolian region Islands of Africa List of countries where Arabic is an official language Mediterranean Basin MENA MENASA Middle East Miombo woodlands Mittelafrika Negroland Northeast Africa Portuguese-speaking African countries Sahara Sahel Sub-Saharan Africa Sudan (region) Sudanian savanna Tropical Africa Zambezian region