Author(s): M. M. Soliman; Eng K. M. Attia; Kotb; A. M. Talaat; A. F. Ahmed

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Abstract: Prior to the High Aswan Dam (HAD) construction, the principal method in training the Nile River were spurs and embankments to confine water in a narrower channel during floods. These structures were made from dumped stone with their top elevation roughly equal to flood level. Spurs were for the most part located along the concave bank of the river bends. The spurs were built with a long sloping nose. This sloping nose resulted in the development of a diving helicoidal current that caused extensive bank erosion downstream and between the spurs. Also a deep scour hole generated downstream the spur, resulted sometimes in slumping the main body of the spur into the scour hole and destroying the structure. There were about 80 large spurs in the Nile River. After the construction of the dam, these spurs are too large in terms of the reduced flows. Therefore, smaller spurs are used. The most common functions of these spurs are to protect the river banks from erosion. No much attention is paid to the spur's dimension, their spacing, and optimum use in terms of the channel improvements, regulation and modification.

DOI:

Year: 1997