Review of methods of spatio-temporal evaluation of rainfall erosivity and their correct application

Brychta, Jiří; Podhrázská, Jana; Šťastná, Milada

doi:10.1016/j.catena.2022.106454

Cited by 17 publications

(14 citation statements)

References 89 publications

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“…The interaction between the number of freeze-thaw cycles and the distance from the bo om of each soil of the rill sidewall on the change rate of soil water content exhibited significant disparities compared to the impact of each individual factor. Based on the results obtained from fi ing the one-factor equation, the relationship: Likewise, the relationship between the change rate k of soil moisture content and the distance z of the soil layer from the bottom of the rill sidewall can all be expressed as an exponential function: 6) where:…”

Section: Analysis Of the Collapse Mechanism Of Rill Sidewall Under Fr...mentioning

confidence: 99%

“…The process of sidewall expansive erosion in rills unfolds during the later stages of rill development, exhibiting a complex, variable, and unpredictable nature attributable to numerous factors including flow dynamics, slope gradients, soil attributes, and management practices [1][2][3][4][5][6][7]. As the developmental trajectory of erosion features, spanning from rills to river gullies, presents a cohesive continuum, the underlying principles governing the expansion of rill sidewalls remain consistent across these various scales, particularly evident in the erosive action of lateral water flow along the rill sidewalls, concentrated scouring at the rill base, mid-flow erosion within loamy substrates, internal soil pipeline erosion, and bank erosion triggered by soil stability-related avalanches [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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The Collapse Mechanism of Slope Rill Sidewall under Composite Erosion of Freeze-Thaw Cycles and Water

Huang,

Shao,

Liu

et al. 2024

Sustainability

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The composite erosion of freeze-thaw and water flow on slope rills is characterized by periodicity and spatial superposition. When revealing the collapse mechanism of slope rill sidewalls under the composite erosion of freeze-thaw and water flow, it is necessary to fully consider the effect of water migration and its impact on the stability of the rill sidewall. In this paper, we placed the self-developed collapse test system in an environmental chamber to carry out model tests on rill sidewall collapse on slopes under the composite erosion of freeze-thaw and water flow. We utilized three-dimensional reconstruction technology and the fixed grid coordinate method to reproduce the collapse process of the rill sidewall and precisely locate the top crack. We obtained the relationship between the water content of the specimen and mechanical indexes through the straight shear test. The main conclusions are as follows: The soil structure of the rill sidewall is significantly affected by the freeze-thaw cycle, which benefits capillary action in the soil. One freeze-thaw cycle has the most serious effect on the soil structure of the rill sidewall, and the change in the moisture field is more intense after the soil temperature drops below zero. The friction angle of the soil increases with the number of freeze-thaw cycles and tends to stabilize gradually. The effect of the freeze-thaw cycle on the rate of change of the water content of the soil at each position of the wall can be accurately described by a logarithmic function. The expression of the two-factor interaction effect on the rate of change of water content of soil at each position of the rill sidewall can be accurately fitted. We propose a calculation system for locating cracks at the top of the rill sidewall and determining the critical state of instability and collapse of the rill sidewall during the process of freeze-thaw and water flow composite erosion. The results of this research can help improve the accuracy of combined freeze-thaw and water flow erosion test equipment and the development of a prediction model for the collapse of the rill sidewall under compound erosion. This is of great significance for soil and water conservation and sustainability.

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Section: Analysis Of the Collapse Mechanism Of Rill Sidewall Under Fr...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Collapse Mechanism of Slope Rill Sidewall under Composite Erosion of Freeze-Thaw Cycles and Water

Huang,

Shao,

Liu

et al. 2024

Sustainability

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“…Rainfall erosivity is well known as the key input parameter of the Universal Soil Loss Equation (USLE) and its revised version RUSLE [5,6], which is a dynamic index used to evaluate the soil separation and migration generated by rainfall [7]. In regard to the calculation approaches of rainfall erosivity, Brychta et al (2022) [8] divided the computing method into two categories: high-resolution and low-resolution approaches. EI30 is a typical high-resolution algorithm for rainfall erosivity, but it cannot be widely used due to the minute-level precipitation data needed.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Consequently, alternative calculation approaches with low-resolution rainfall records have been successively developed, i.e., annual, monthly, and daily rainfall erosivity calculation models, as summarized in the reviews by Yin et al (2017) [11] and Brychta et al (2022). [8] There are evident differences in the regional applicability of each model owing to the difference of the algorithm and input parameters, whether in China or other parts of the world. In China, Xie et al (2016) [12] applied three different models to validate the calculation accuracy of daily rainfall erosivity and found that the computed erosivity from daily rainfall data were generally sufficient for estimating yearly and monthly time scales.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Asymmetric Characteristic of Extreme Rainfall Erosivity in 8 Provinces of Southern China during 1961–2020

Zhu

Cao

Zhao

et al. 2023

Water

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The roles of rainfall with various intensities in hydraulic erosion processes are obviously different. In-depth knowledge about the spatiotemporal variation in extreme rainfall erosivity is critical for soil erosion risk assessment and formulation of response measures. In the period of 1961–2020, more than 390,000 erosive rainfall data from 212 meteorological stations were collected to explore the erosion characteristics of different intensities of rainfall erosivity across southern China. The asymmetric characteristic of extreme rainfall erosion was analyzed and expressed by an asymmetric change index (ACI) defined in this study. Correlation analysis was applied to study the impact of global extreme climate events on the ACI. The results showed that different patterns of precipitation had evident asymmetric characteristics in rainfall erosivity, and fewer high-intensity precipitation events contributed to much higher total rainfall erosivity, particularly for rainstorms (≥100 mm). The ACI of the rainfall erosivity exhibited evident spatial heterogeneity; insignificant increasing trends were found in the ACIs for heavy rainfall, torrential, and rainstorm erosivities over the past 60 years. The change rate of ACI varied greatly on both monthly and interdecadal scales, and the ACI of rainstorms showed the maximum linear increasing trend on the long-time scale. There were significantly high correlations between the ACI and erosive rainfall days and the ACI and erosive rainfall (p < 0.01), and the correlation coefficients were relatively higher from May to October, where the precipitation was concentrated. Additionally, the El Niño-Southern Oscillation and tropical cyclones clearly influenced the spatiotemporal distribution of the ACI and rainfall erosivity but were limited to specific periods and regions. These results could provide a reference for extreme soil erosion event monitoring and control in southern China.

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Combining RUSLE model and the vegetation health index to unravel the relationship between soil erosion and droughts in southeastern Tunisia

Terwayet Bayouli,

Zhang,

Terwayet Bayouli

2023

J. Arid Land

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Droughts and soil erosion are among the most prominent climatic driven hazards in drylands, leading to detrimental environmental impacts, such as degraded lands, deteriorated ecosystem services and biodiversity, and increased greenhouse gas emissions. In response to the current lack of studies combining drought conditions and soil erosion processes, in this study, we developed a comprehensive Geographic Information System (GIS)-based approach to assess soil erosion and droughts, thereby revealing the relationship between soil erosion and droughts under an arid climate. The vegetation condition index (VCI) and temperature condition index (TCI) derived respectively from the enhanced vegetation index (EVI) MOD13A2 and land surface temperature (LST) MOD11A2 products were combined to generate the vegetation health index (VHI). The VHI has been conceived as an efficient tool to monitor droughts in the Negueb watershed, southeastern Tunisia. The revised universal soil loss equation (RUSLE) model was applied to quantitatively estimate soil erosion. The relationship between soil erosion and droughts was investigated through Pearson correlation. Results exhibited that the Negueb watershed experienced recurrent mild to extreme drought during 2000–2016. The average soil erosion rate was determined to be 1.8 t/(hm2·a). The mountainous western part of the watershed was the most vulnerable not only to soil erosion but also to droughts. The slope length and steepness factor was shown to be the most significant controlling parameter driving soil erosion. The relationship between droughts and soil erosion had a positive correlation (r=0.3); however, the correlation was highly varied spatially across the watershed. Drought was linked to soil erosion in the Negueb watershed. The current study provides insight for natural disaster risk assessment, land managers, and stake-holders to apply appropriate management measures to promote sustainable development goals in fragile environments.

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Review of methods of spatio-temporal evaluation of rainfall erosivity and their correct application

Cited by 17 publications

References 89 publications

The Collapse Mechanism of Slope Rill Sidewall under Composite Erosion of Freeze-Thaw Cycles and Water

The Collapse Mechanism of Slope Rill Sidewall under Composite Erosion of Freeze-Thaw Cycles and Water

Analysis of the Asymmetric Characteristic of Extreme Rainfall Erosivity in 8 Provinces of Southern China during 1961–2020

Combining RUSLE model and the vegetation health index to unravel the relationship between soil erosion and droughts in southeastern Tunisia

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