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SUDD

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Originally appearing in Volume V26, Page 20 of the 1911 Encyclopedia Britannica.
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SUDD , or See also:

SADo (an Arabic word meaning "to See also:dam" ), the name given to the See also:vegetable obstruction which has at various See also:dates closed the See also:waters of the Upper See also:Nile to See also:navigation. It is composed of masses of See also:papyrus and um suf (Vossia procera) and the See also:earth adhering to the roots of those reeds. Mingled with the papyrus and See also:urn suf (Arabic for " See also:mother-of-See also:wool") are small See also:swimming See also:plants and the See also:light brittle ambach. The papyrus and um suf grow abundantly along the Nile See also:banks and the connected lagoons between 70 N. and 13° N. Loosened by storms these reeds See also:drift until they See also:lodge on some obstruction and See also:form a dam across the channel, converted by fresh arrivals into blocks that are sometimes 25 M. in length, and extend 15 to 20 ft. below the See also:surface. These masses of decayed vegetation and earth, resembling See also:peat in consistency, are so much compressed by the force of the current that men can walk over them every-where. In parts elephants could See also:cross them without danger. The pressure of the See also:water at length causes the formation of a See also:side channel or the bursting of the sudd. (For sudd cutting see NILE.) In the See also:Bahr-el-Ghazal the sudd, being chiefly composed of small swimming plants, is of less formidable nature than that of the See also:main stream. Consult, O. Deuerling, See also:Die Pflanzenbarren der afrikanischen Flusse (See also:Munich, 1909), a valuable monograph; and the bibliography under NILE, especially See also:Captain H. G.

See also:

Lyons, The Physiography of the Nile and its See also:Basin (See also:Cairo, 1906).

End of Article: SUDD

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