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This is linked to a marked decline in the scale of the Nile floods between 2700 and 2100 BC. [11] One theory proposed that humans accelerated the drying out period from 6,000–2,500 BC by pastoralists overgrazing available grassland. [12]
An anabranch river, the Bahr el Zeraf, flows out of the Nile's Bahr al Jabal section and rejoins the White Nile. The flow rate of the Bahr al Jabal at Mongalla is almost constant throughout the year and averages 1,048 m 3 /s (37,000 cu ft/s). After Mongalla, the Bahr Al Jabal enters the enormous swamps of the Sudd region.
The canal was controlled by the Ha-Uar Dam, which was actually two dams that regulated the flow into the lake and out of the Nile. As the surrounding area changed at about 230 BC, the Bahr Yussef eventually became neglected, leaving most of Lake Moeris to dry up, creating the depression that exists today and the modern Faiyum Oasis.
An underwater archaeological mission in the Nile River near Aswan, Egypt, recovered a handful of long-lost artifacts. When the building of the Aswan High Dam in the 1960s flooded the area, UNESCO ...
The White Nile had become a seasonal river [95] whose course [96] along with that of the main Nile may have been dammed by dunes. [97] The Nile Delta was partially dry, with sandy plains extending between ephemeral channels and exposed seafloor, and it became a source of sand for ergs [d] farther east. [99]
With the Nile river in the east of the country, parts of Sudan have substantial water resources, but those in the west have to rely on wadis, seasonal wells which often dry up. These imbalances in water availability are a source of hardship, as well as a source of conflict.
In 2300 BC, the waterway from the Nile River to the natural lake was widened and deepened to make a canal now known as the Bahr Yussef. This canal fed into the lake. This was meant to serve three purposes: control the flooding of the Nile, regulate the water level of the Nile during dry seasons, and serve the surrounding area with irrigation.
The festival of the Nile as depicted in Norden's Voyage d'Egypte et de Nubie Map of the Nile river. The flooding of the Nile (commonly referred to as the inundation) has been an important natural cycle in Nubia and Egypt since ancient times. It is celebrated by Egyptians as an annual holiday for two weeks starting August 15, known as Wafaa El-Nil.