Erosion of fixed dunes in the Sahel, Central Niger

作者：Michael R. Talbot, Martin A.J. Williams · 发表于：Earth Surface Processes and Landforms · 年份：1978 · DOI：10.1002/esp.3290030202 · 被引用次数：65 · 研究领域：Soil erosion and sediment transport、Aeolian processes and effects、African Botany and Ecology Studies

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.