Time variation of dust concentration due to wind blowing using wind tunnel

Subject Areas : Water and Environment

ABDOLAZIM GHOMEISHI ¹ , Mehdi Ghomeshi ² , MOHAMMAD MAHMOODIAN SHOOSHTARI ³ , AHMAD LANDI ⁴ , Mohammad hossein purmohammadi ⁵

1 - Department of Civil, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran
2 - Department of Hydraulic Structures, Faculty of Water and Environmental Engineering, Shahid Chamran University, Ahvaz
3 - Department of Civil Engineering, Water Resources Engineering and Management, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran,
4 - , Department of Soil Science, College of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
5 - Department of Water Sciences Engineering, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran

Received: 2023-11-01 Accepted : 2023-12-02 Published : 2023-06-22

Keywords: dust, Wind tunnel, southeast Ahvaz,

Abstract :

Dust is created by wind erosion. In nature, based on the size of the particles, the movement of soil particles due to wind is carried out in three ways. Rolling, jumping and suspension. In the wind ranges that usually occur in nature, proportional to the diameter of the soil particles, these three modes of particle motion are somewhat separable. Particles smaller than 0.1 mm in diameter are usually suspended, soil particles with a diameter of 0.05 to 0.5 mm usually bounce, and soil particles with a diameter of 0.5 to 2 mm move in a crawling (rolling) manner. In the wind tunnel tests, which were conducted on the soil samples collected from the dust centers in the southeast of Ahvaz. It showed that at the reference point, when the wind blows, a lot of dust is formed in front of the soil mass.The obtained results show that the maximum amount of dust is formed in the first 150 seconds. The maximum amount of dust produced occurs in the first 85 seconds, which is about 7 times more than the dust after the first 150 seconds.