Threshold friction velocity and soil loss across different land uses in arid regions: Iran

摘要: Wind erosion is one of the important aspects land degradation in arid and semiarid regions. The study wind variations very choosing designing biological mechanical practices for control. This research investigates threshold velocities soil loss across five different uses by tunnel testing. According to results, highest friction velocity (TFV) was related Ziziphus nummularia natural forests then agricultural land, rangelands, planted Prosopis juliflora forests, sand dunes, respectively. Also, most dust concentration dunes reduced P. agriculture, Z. forest uses, Results principal components analysis showed three main controlling TFV as PC1, PC2, PC3 with quotas 51.6%, 20.9%, 9.7%, respectively (PC1 imposes largest contribution into TFV). PC1 composed following components: organic matter, Mg, Ca, silt, saturation moisture content, compressive strength. In general, it can be concluded that, among factors affecting erosion, texture, matter have significant effects on resistance erosion.