The Interaction of Aeolian Sand and Slope on Runoff and Soil Loss on a Loess Slope via Simulated Rainfall under Laboratory Conditions

The wind–water erosion crisscross region, where the topography is complicated, most severe area of soil on Loess Plateau. wind and terrain both have an impact water process. In order to evaluate effects sand cover runoff loss characteristics, a series experiments was conducted in two contrasting treatments. One treatment bare loess slope serving as control, others were sand-covered slopes with five different slopes. results showed that time, total yield, between 15°. sediment concentration significantly higher than during entire rainfall process (p < 0.05). increase gradient shortened surface initiation times enhanced volume loss. 39.7 L 44.3 kg, respectively, 10°. When increased from 10° 30°, by 22.8 42.8 while 300 s. For slopes, processes appeared be mainly dominated transport. correlation rates gradients demonstrated secondary polynomial function. addition, critical approximately 23° 28°. proportion responsible for 3:1, which means effect more important terrace factor terms region. provide theoretical basis control this area.