On many maps it is marked as the Bahr-el-Arab, a designation also used as an alternative name for the Lol l another tributary of the Ghazal, which eventually unites with the Bahr-el-Homr. The Bahr-el-Homr in its lower reaches was in 1906 completely blocked by sudd, and then brought no water into the Bahr-el-Ghazal.
The Sudan government, however, sent engineering parties to remove the sudd blocks and open out a continuous waterway.
This lake is the home of many sudd plants of the "swimming" variety - papyrus and ambach are absent.
In 1901 and following years the sudd was removed by British officers from the Bahr-el-Ghazal, the Jur and other rivers.
Here it broadens into Lake Ibrahim (Kioga) (in reality a vast backwater of the Nile discovered by Colonel Chaille Long in 1874), and continues navigable (save for sudd obstacles at times) right through Lake Ibrahim and thence northwards for loo m.
In the sudd region thunderstorms are frequent.
The forest lands of the White Nile as far south as the sudd region are of similar character to that described.
Powerful dredgers and sudd-cutting machines are used to keep open communications in the upper Nile and Bahr-el-Ghazal.
The command of the expedition was given to Sir Samuel Baker, who reached Khartum in February 1870, but, owing to the obstruction of the river by the sudd or grass barrier, did not reach Gondokoro, the centre of his province, for fourteen months.
From Khartum he proceeded up the White Nile to Gondokoro, where he arrived in twenty-four days, the sudd, which had proved such an obstacle to Baker, having been removed since the departure of the latter by the Egyptian governor-general.