Abstract

Report on Workshop on Physics of Desertification.- Desertification of Arid Lands.- Wind Versus Water Erosion in the Context of Desertification.- The United Nations Organization and the Issue of Desertification.- The Impact of Desertification on Land Productivity in Sudan.- Desertification Problems in a Humid Region.- The Formation and Motion of Dunes and Sand Seas.- Two-Dimensional Analysis of Dune Profile and the Effects of Grain Size on Sand Dune Morphology.- Stabilization and Afforestation of Sand Dunes Through Biosaline Culture Technique.- Some Aspects of Sand Stabilization in Egypt.- Eco-Technique-Magic Formula for Reclaiming Desertlfied Semiarid Crop Land.- Monitoring the Sand-Moving Desert Winds.- Aeolian Activity as a Planetary Process.- On the Reddening of Quartz Grains in Dune Sand.- The Wind and Desertification Processes in the Saharo-Sahelian and Sahelian Regions.- The Advance Mechanism of Longitudinal Dunes.- Production of Dust.- Soil Erosion by Wind: An Overview.- Wind Erosion in the Interior Delta of the Niger in Mali.- Aeolian Processes and Features at Amboy Lava Field, California.- Aeolian Processes in the Environmental Wind Tunnel and in the Atmosphere.- Threshold Velocities for Dust Production.- Formation of Ripples, Dunes, and Antidunes in River Beds.- Saltation Threshold Mechanics.- Dust Production by Wind Erosion: Necessary Conditions and Estimates of Vertical Fluxes of Dust and Visibility Reduction by Dust.- The Aeolian Wind Tunnel-Saltation Similitude.- Shape and Dimension of Dunes in Open Channel Flow.- The Stability and Propagation of Sand Ripples and Dunes.- Turbulent Flow Over Topography With Applications to Sand-Wave Development.

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