Soil Erodibility under Natural Rainfall Conditions as the K Factor of the Universal Soil Loss Equation and Application of the Nomograph for a Subtropical Ultisol

Cassol, Elemar Antonino; Silva, Tiago Stumpf da; Eltz, Flávio Luiz Foletto; Levien, Renato

doi:10.1590/18069657rbcs20170262

Cited by 34 publications

(25 citation statements)

References 16 publications

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“…The particle size distribution shows that the upper horizons (U) have higher clay percentage ( Table 2). As a consequence, soil particles have more cohesion, increasing resistance to water erosion, similar results as found by Knapen et al (2007); Havaee et al (2015) and Cassol et al (2018).…”

Section: Resultssupporting

confidence: 81%

Application of MCT Methodology to Determine Soil Erodibility in Road Cutting Slopes in Quadrilátero Ferrífero Region

Couto

Gomes

2020

Anuário IGEO UFRJ

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ResumoA erodibilidade é definida como a suscetibilidade do solo aos processos erosivos. Apesar de diversos estudos desenvolvidos na área agronômica, ainda existem lacunas no que se refere a taludes de corte rodoviários, principalmente pelas diferentes condições estruturais do solo. O presente trabalho aborda a erodibilidade de taludes de corte rodoviários localizados na região do Quadrilátero Ferrífero -MG, com presença de horizontes de comportamentos antagônicos em relação à erosão. A avaliação da erodibilidade foi feita por meio de ensaios de caracterização geotécnica, metodologia Miniatura Compactada para Solos Tropicais (MCT), infiltrabilidade e perda de massa por imersão modificada. Os resultados da metodologia MCT demonstram comportamento nitidamente diferente entre solos resistentes e erodíveis, confirmando que condições lateríticas aumentam a resistência do solo frente à erosão hídrica. O critério de erodibilidade MCT verificou que solos erodíveis são mais instáveis quando em contato com a água, mostrando melhor desempenho quando comparado à metodologia MCT convencional. Portanto, solos mais intemperizados ou em condição lateríticas, são mais resistentes aos processos erosivos, enquanto que solos menos evoluídos, com horizontes C, são propensos à erosão, necessitando de medidas de controle que evitem sua exposição direta as intempéries. Palavras-chave: Erodibilidade; Metodologia MCT; Taludes de Corte; Quadrilátero Ferrífero. AbstractErodibility is defined as soil susceptibility to erosive processes. Although several studies have been developed in agronomic area, there are still gaps regarding road slopes, mainly due to the different soil structure conditions. This present work addresses the erodibility in road cut slopes located in the Quadrilátero Ferrífero -MG, with presence of horizons of antagonistic behavior in relation to erosion. The erodibility evaluation was made by geotechnical characterization, Compacted Miniature for Tropical Soils methodology (MCT), infiltrability and modified immersion mass loss tests. The results of MCT methodology demonstrate distinctly behavior between resistant and erodible soils, confirming that lateritic conditions increase soil resistance against water erosion. The MCT erodibility criterion checked that erodible soils are more unstable when in contact with water, showing better performance when compared to conventional MCT test. Therefore, more weathered or lateritic soils are more resistant to erosive processes, while less evolved soils, such as C horizons, are prone to erosion, requiring control measures to prevent their direct exposure to weathering.

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Section: Resultssupporting

confidence: 81%

Application of MCT Methodology to Determine Soil Erodibility in Road Cutting Slopes in Quadrilátero Ferrífero Region

Couto

Gomes

2020

Anuário IGEO UFRJ

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“…Quantitative assessment of land erosion has been undertaken by various approaches using spatially distributed data. There are numerous mathematical and process-based models to predict soil erosion, but the Revised Universal Soil Loss Equation (RUSLE) is most widely used [21][22][23][24][25]. It is simple, easy to use and successfully integrate the ecosystem parameters.…”

Section: Introductionmentioning

confidence: 99%

Spatial Variability of Soil Erodibility at El Hammam Catchment, Northeast of Algeria

Khanchoul¹,

Boubehziz²

2019

Environ. ecosyst. sci.

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The concept of erodibility has gained a great importance in the field of soil erosion modelling and applications of soil conservation. Soil erodibility factor has become one of the key factors which determine soil particles resistance to be detached by water erosion. This study was performed to determine soil erodibility factor and assess spatial variability of soil erodibility using geostatistics at El Hammam catchment. In this study 51 samples of surface soil (0-20cm) were collected across the study area of 1000 Ha by preparing point map at GIS. Sampling points were identified in field by a Global Positioning system. Some soil properties and organic matter were measured at laboratory, and permeability and structure were determined using soil texture analysis. Amount of soil erodibility changed from 0.16 to 0.66. The variability analysis has shown that soil properties and erodibility factor have varied significantly in cropland and have ranged from 63% in organic matter and 39% in K factor. The statistical analysis indicated negative correlations of erodibility with clay, organic matter and permeability and negative correlations of this factor with silt, sand and soil structure. Based on kriging interpolation method, soil erodibility factor map was generated using Ordinary Kriging. The spherical model has given the best model to predict spatial variability of soil erodibility which root-mean-square error and mean error values of interpolated map were very low. The range of the spatial dependency was equal to 460 m. The study basin has been classified as highly erodible and ecologically vulnerable.

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“…Soil erodibility index shows the soil resilience against erosion, namely particle retention to detachment and soil displacement due to rainfall kinetic energy (Cassol et al, 2018). High organic matter content will lead to high erodibility value (Santoso et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Analysis of Land Physical Change, Land Use and Value of Soil Erosion: Case Study of Tawaeli Watershed, Palu, Indonesia

Ramlan¹,

Pagiu²,

Pata`Dungan³

et al. 2019

J. Eng. Appl. Sci.

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This study aimed to examine land physical change against the erodibility of soil erosion. This study is a form of land use survey. It was performed in the Taweli watershed in the city of Palu. Sample was randomly taken. Research variables were rainfall erosivity, physical characteristics and value of soil erodibility, Length and Slope (LS), vegetation factor and soil management. The value of erosion was calculated based on USLE (Universal Soil Loss Equation) method. Study result revealed that the forest had the value of soil erosion of 0.18-2.15 ton ha-1 year-1 that categorized as very low erosion hazard level. Mixed farming land had the value of soil erosion of 6.97-29.29 ton ha-1 year-1 that categorized as low, shrubs was categorized into average to heavy erosion hazardous level of 89.44-1687.64 ton ha-1 year-1 and the primary forests had value of erosion of 1.68, 9.80 and 19.85 ton ha-1 year-1 , respectively which categorized as very low. Therefore, it can be inferred that land of shrubs have high value of erosion compared to the land use for forest and mixed farming agriculture.

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Soil Erodibility under Natural Rainfall Conditions as the K Factor of the Universal Soil Loss Equation and Application of the Nomograph for a Subtropical Ultisol

Cited by 34 publications

References 16 publications

Application of MCT Methodology to Determine Soil Erodibility in Road Cutting Slopes in Quadrilátero Ferrífero Region

Application of MCT Methodology to Determine Soil Erodibility in Road Cutting Slopes in Quadrilátero Ferrífero Region

Spatial Variability of Soil Erodibility at El Hammam Catchment, Northeast of Algeria

Analysis of Land Physical Change, Land Use and Value of Soil Erosion: Case Study of Tawaeli Watershed, Palu, Indonesia

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