Abstract
A rain storm covered the whole arid eastern desert of Egypt in February 1975. Flash floods issued from the western slopes of the Red Sea hills and surged over the bare desert soil. This flash flood was studied quantitatively in terms of the amount of water present, its contribution to underground water, sediment discharge, chemical denudation, soil erosion and total denudation. The results are extrapolated to include calculations of soil erodability and the contribution of Egyptian flash floods to sediments in the Nile cone. A corrected picture of the role of erosion, water transportation and sedimentation in this part of the Nile system, and of the role of water erosion in arid regions in general, is proposed, along with measures recommended for water and soil conservation.
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