Erosion of fixed dunes in the Sahel,Central Niger |
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Authors: | M. R. Talbot M. A. J. Williams |
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Abstract: | During the 1974 rainy season gullies of the order of 150–300 m long were active on the flanks of fixed Pleistocene dunes in the vicinity of Janjari, central Niger. The gullies terminate on small (0.5–1 × 104m2) alluvial fans, where sand deposition had occurred below the intersection point. Gully activity was probably the result of a particularly severe storm. Comparison between fixed dunes subject to differing climatic conditions suggests that gullying and alluvial fan formation may be characteristic of a restricted morphoclimatic zone. |
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Keywords: | Fixed dunes Alluvial fans |
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