The minimum wind velocity required to initiate movement of soil particle is known as :

🔑 Key Points
📌 Threshold Velocity
➤ Brief description:
The threshold velocity is the minimum wind velocity required to initiate the movement of soil particles.

➤ It varies with soil conditions and the nature of the ground surface.

➤ Threshold velocity is inversely proportional to particle size:
Threshold velocity ∝ 1/Particle size

➤ For a soil particle size of 0.1 mm, the threshold velocity is 16 km/hr, measured at a height of 30 cm.

📝 Additional Information
📌 Fluid Threshold Velocity
➤ The minimum velocity required to produce soil movement by the direct action of wind.

📌 Impact Threshold Velocity
➤ The minimum velocity required to initiate movement from the impact of soil particles carried in saltation.