Wind Tunnel and Threshold Wind Velocity Simulation in Different Land-Units of Sand and Dust Storm Sources

The results of wind erosion threshold estimation in the studied area showed that the velocity of wind erosion threshold varied from 17-6 (m.s-1) and the erosion rate ranged from 30 to 2200 (gr.m-2.min-1) at a wind velocity of 20(m/s). The lowest threshold velocity is located in the sedimentary plains of Jarahi-Mahshahr, located in the northwest of the center, and the highest amount of erosion was in the alluviums and Alluvial Fans of Hendijan anticline, located in the southeast of the center. Conclusion This study considers the primary factor of dust emission potential based on land units and reveals the substantial of alluvium, alluvial fans, and alluvial plains as major contributors to the erodible sediment contributing to dust emissions in the study area. Alluviums and alluvial fans deposited by ephemeral rivers in the eastern foothills of Hendijan contain fine-grained sediments and marl that are highly erodible and must be stabilized early on. Furthermore, according to the results of granulation tests conducted in accordance with the Chepil theory, the erodibility of all samples collected from the dust sources of Khuzestan province was high, and all samples were sensitive to wind erosion. Overall, by locating dust sources based on land units, we can implement more accurate and effective land stabilization methods against wind erosion in alluvium, alluvial fans, and alluvial plains. Furthermore, using the Chipel theory and grain size, we can classify the soil erosion susceptibility of these areas