Journal of Geographical Sciences

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Rainfall effects on wind erosion processes on the simulated Gobi surface using indoor experiments

SUN Liying, WANG Chunhui, DUAN Guangyao

地理学报(英文版), 2024, 34(3): 610-630. DOI: 10.1007/s11442-024-2220-4

Gravel coverage (%)		Particle size distribution (PSD)			Fine particles	d₅₀ (mm)
Gravel coverage (%)		Clay (<0.002 mm/%)	Silt (0.002-0.05 mm/%)	Sand (0.05-2 mm/%)	Fine particles	d₅₀ (mm)
Before rainfall event	Original	2.97±0.22^a	11.86±0.71^a	85.17±0.93^a	14.83±1.84^a	0.160±0.000^a
After rainfall event	0	2.88±0.74^a	12.02±2.73^a	85.10±3.47^a	14.90±3.47^a	0.157±0.000^a
	20	3.19±0.04^a	11.73±0.28^a	85.08±0.28^a	14.92±0.32^a	0.156±0.000^a
	40	3.13±0.32^a	11.30±0.34^a	85.57±0.67^a	14.43±0.67^a	0.164±0.000^a
	60	2.84±0.18^a	11.61±0.77^a	85.54±0.95^a	14.46±0.95^a	0.158±0.000^a

Table 5 Particle size distribution (PSD) on-slope before (original value) and after rainfall events under different gravel coverages

本文的其它图/表

Figure 1 Location and typical landscape of the soil sampling site in Inner Mongolia, China: (a) location and (b) landscape
Figure 2 Images of the indoor artificial experiment: (a) calibration of the spatial homogeneity of the rainfall intensity and (b) wind tunnel experiment
Figure 3 Simulated Gobi surfaces in the experiments with different gravel coverages: (a) 0%; (b) 20%; (c) 40%; and (d) 60%
Figure 4 Wind erosion rate (WR) values under different experimental conditions: (a) contrast group and (b) test group
Table 1 Variations in wind erosion rate (WR) and its relationship with wind velocity
Figure 5 Sediment transportation rate (STR) under different experimental conditions: (a) contrast group under 0% gravel coverage; (b) contrast group under 20% gravel coverage; (c) contrast group under 40% gravel coverage; (d) contrast group under 60% gravel coverage; (e) test group under 0% gravel coverage; (f) test group under 20% gravel coverage; (g) test group under 40% gravel coverage; and (h) test group under 60% gravel coverage
Table 2 Variations in the sediment transportation rate (STR) and maximum height under different experimental conditions
Table 3 Relationship between sediment transportation rate (STR) and transportation height under different experimental conditions
Table 4 Contribution of rainfall events to the wind erosion rate (WR) and sediment transportation rate (STR).
Figure 6 Cumulative mass percents of particles on-slope before (original value) and after rainfall event
Figure 7 Images of the soil surface by stereomicroscopy: (a) 0% gravel coverage before a rainfall event; (b) 0% gravel coverage after a rainfall event; (c) 20% gravel coverage before a rainfall event; (d) 20% gravel coverage after a rainfall event; (e) 40% grave coverage before a rainfall event; (f) 40% gravel coverage after a rainfall event; (g) 60% gravel coverage before a rainfall event; and (h) 60% gravel coverage after a rainfall event
Figure 8 Changes in soil surface roughness (SSR) due to the rainfall event

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