Modeling soil erodibility and critical shear stress parameters for soil loss estimation

Lee, Sanghyun; Chu, Maria L.; Guzmán, Jorge; Flanagan, D. C.

doi:10.1016/j.still.2021.105292

Cited by 8 publications

(3 citation statements)

References 19 publications

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“…Soil erosion reduction is mainly controlled by soil properties and can be quantitatively reflected by different parameters (soil texture, structure, aggregate, shear strength, and organic colloids) from different approaches (Gyamfi et al, 2016; Lee et al, 2022; Yamaguchi et al, 2022). Normally, finer particles, more colloidal materials, and higher aggregate content result in stronger soil erosion reduction (Wang et al, 2019a).…”

Section: Discussionmentioning

confidence: 99%

Effects of vegetation restoration types on soil erosion reduction of a shallow karst fissure soil system in the degraded karst areas of Southwestern China

et al. 2023

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Shallow karst fissures are the main hydrological paths, underground loss channels, and one of the most critical root habitats in fragile karst rocky desertification areas. Revegetation may alter the type of vegetation cover in fissures, resulting in changes to soil properties and erosion reduction. In this study, we evaluate the influence of revegetation on the soil erosion reduction of fissure‐soil–plant systems (FSPS) for three vegetation types (herbs, shrubs, and trees) in FSPS and use bare FSPS without vegetation as a control in a karst rocky desertification area. The results show that the soil physicochemical properties of FSFS degraded first and then improved after abandonment, resulting in the order of soil erosion reduction of FSPS with vegetation succession being: shrub < herb < bare < tree. Vegetation restoration can significantly improve the soil erosion resistance of the 10–20 cm soil layer in the fissure zone, making it stronger than that in the non‐fissure zone, thus reducing the risk of underground leakage on the slope. The results obtained in this study deepen our knowledge of the impact of vegetation restoration type on soil erosion reduction and has significant implications for guiding vegetation restoration and preventing underground leakage in karst areas.

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Section: Discussionmentioning

confidence: 99%

Effects of vegetation restoration types on soil erosion reduction of a shallow karst fissure soil system in the degraded karst areas of Southwestern China

et al. 2023

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“…In our study, we investigated runoff erosion based on runoff shear stress and the critical shear stress of the soil. The critical shear stress of the soil is a crucial indicator of its resistance to runoff erosion and its susceptibility to shear deformation failure [23][24][25]. Typically, the value of the critical shear stress is determined through empirical relationships or reference tables [19].…”

Section: Discussionmentioning

confidence: 99%

Effects of Different Tillage Practices on Slope Erosion Characteristics of Peanut Field

Liang,

Song,

Zhang

et al. 2023

Agronomy

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Under three rainfall intensities (60–90–120 mm/h) and four tillage practices (longitudinal ridge tillage, cross ridge tillage, flat tillage and hole sowing), field experiments was conducted during the podding stage of peanuts to investigate the changes in hydrodynamic parameters and the erosion response on purple soil slope cropland in order to reveal the soil and water conservation benefits of different tillage practices. The results showed that: (1) The sediment yield of the four tillage practices was ranked in descending order: longitudinal ridge tillage, flat tillage, hole sowing, and cross ridge tillage. Under the same rainfall intensity, there were no significant differences in runoff among these four tillage practices (p > 0.05), whereas sediment yield varied significantly. (2) The average flow velocity, Reynolds number, and Froude number of each treatment were positively correlated with rainfall intensity, while the resistance coefficient was negatively correlated. Flat tillage and cross ridge tillage were intermediate. The Reynolds number and Froude number of each treatment did not exceed the critical value and were generally within the laminar flow range, except for the longitudinal ridge tillage treatment at 120 mm/h rainfall intensity. (3) The sediment yield intensity on the slope was negatively correlated with the resistance coefficient, following a power function. The runoff shear stress and runoff power on each treatment were both positively correlated with sediment yield intensity in a linear manner. Compared to longitudinal ridge tillage, the other three tillage practices showed much better soil and water conservation benefits. Among them, cross ridge tillage exhibited the best water storage and soil conservation effects. In terms of hydraulics, longitudinal ridge tillage and flat tillage increased the erosive force required for sediment initiation and suppressed erosion occurrence. The research results were of great significance in revealing the characteristics of runoff erosion in purple soil areas and controlling tillage practices for soil erosion in purple soil areas.

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“…Soil aggregate stability significantly influences soil sustainability and crop production [1]. Soil erodibility represents the soil resistance to soil erosion [3,4]. They are both closely related to soil properties, biological factors, land use, and climate [1,[5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Spatial Contribution of Environmental Factors to Soil Aggregate Stability in a Small Catchment of the Loess Plateau, China

Chen

et al. 2022

Agronomy

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Soil aggregate stability and erodibility are the influential factors governing soil resistance to water erosion. The interactions among aggregate stability, erodibility, and their influencing factors have not been fully explored. We collected soil samples from 0–10 cm and 10–20 cm layers in the Zhifanggou watershed. Then, the major contributors to aggregate stability and erodibility and how soil properties, environmental factors and land use contributed to them were explored by using partial least-squares regression and path analysis, respectively. The results showed that the major contributors included the slope, soil organic carbon (SOC), elevation, the percentage of landscape area of farmland (PLAND_F) and grassland (PLAND_G), the land surface temperature difference between seasons (ΔLST), topographic wetness index (TWI), pH, amorphous iron (poorly ordered forms of iron, Feo), and calcium carbonate (CaCO3). In which, the slope, SOC, and elevation were the most important contributors to the mean weight diameter (MWD) and the percentage of water-stable aggregates greater than 0.25 mm (WSA>0.25) and had a direct contribution to MWD, WSA>0.25, and K factors. The PLAND_F and PLAND_G had a significant and indirect contribution to those three indices by affecting slope. Meanwhile, the effects of pH, Feo, and CaCO3 on WSA>0.25 should also not be underestimated. For MWD and WSA>0.25, there was a significantly higher effect of the land use types and composition than hydrothermal conditions. For K factors, PLAND’s contribution was still higher than ΔLST and TWI, but they were all significant. The other soil properties, including pH, CaCO3, and Feo, indirectly affected them by influencing SOC. However, the direct contributions of soil properties increased as the soil layer deepened.

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Modeling soil erodibility and critical shear stress parameters for soil loss estimation

Cited by 8 publications

References 19 publications

Effects of vegetation restoration types on soil erosion reduction of a shallow karst fissure soil system in the degraded karst areas of Southwestern China

Effects of vegetation restoration types on soil erosion reduction of a shallow karst fissure soil system in the degraded karst areas of Southwestern China

Effects of Different Tillage Practices on Slope Erosion Characteristics of Peanut Field

Spatial Contribution of Environmental Factors to Soil Aggregate Stability in a Small Catchment of the Loess Plateau, China

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