Effects of both slope length of standard plot and algorithms of LS on calculated values of topography factor (LS) in black soil areas in Northeast China.

Black soil areas are strongly affected by rill erosion due to the geomorphic characteristics of flood plains and heavy rainfall. To study the problem of rill erosion in black soil areas and achieve ecological restoration, based on the method of artificially simulated rainfall, the effects of rainfall intensity and slope on the characteristics of flow and sand production on the slope surface of black soil areas were studied, and the erosion pattern of the slope surface after rainfall was monitored by a 3D laser scanner to analyze the erosion of the soil on the slope surface. The slope erosion model was constructed on the basis of the cellular automata (CA) method, and the results of the model’s operation were compared with actual rainfall measurement results to deepen research on the slope erosion mechanism in black soil areas. By analyzing the slope erosion pattern after rainfall, it was found that the surface area and erosion volume of serious slope erosion areas increased with increases in slope gradient. Based on the physical model test results combined with the CA model to simulate flow and sand production on bare slopes under different rainfall intensities, comparison showed that the CA model can accurately simulate flow and sand production on a slope where the Ens coefficient of the flow production rate is between 0.70 and 0.97, thus theoretically verifying the reliability of the model, and on this basis, the erosion pattern of the slope after rainfall was predicted to explore the evolution and development law of erosion.

Rill

10.3390/rs13132586

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Citations (2)

Response of interrill erosion to flow parameters of sand loess in regions with high and coarse sediment yields

Journal of Hydrology (2020)

Pu Li Kuandi Zhang Jingwen Wang Deqian Feng

Stream power

Intensity

Loess plateau

10.1016/j.jhydrol.2020.125786

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Citations (13)

DEM-based quantitative analysis of soil erosion——a case study of Maoershan region

Ziran zaihai xuebao (2009)

Kong Da

Based on the platform of ArcGIS9.0,the evaluation model of soil erosion was made by using usual soil loss equation,the cell based on the soil loss and erosion intensity was calculated by using attribute data and spatial data that include DEM,land use types and soil types.The terrain factors(elevation,slope and aspect) and distribution index was overlapped to quantitatively analyse the region soil erosion,which could study the soil erosion spatial distribution from terrains factors(elevation,slope and aspect).The results shown that weak and moderate erosion occupies dominant ratio on the whole;on the soil erosion distribution of aspect,the distribution of mild,intensive and strongest grades erosion is main in the half-sunny and sunny aspect;the moderate and mild erosion occupies a certain ratio in various elevation grades,which shows that there is no linear relation between soil erosion intensity and elevation.

Elevation (ballistics)

Intensity

Source

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Citations (1)