Size Characteristics of Sediments Eroded under Different Masson Pine Litter Covers in South China

Zhu, Fangfang; Li, Yuchen; Cheng, Jinhua

doi:10.3390/w13162190

Cited by 3 publications

(2 citation statements)

References 34 publications

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“…The fractal dimension of the weathered debris particle size was calculated 23 – 25 as follows: where D is the fractal dimension of weathered debris size; r is the size of weathered debris (μm); R i is the size of weathered waste of size class i (μm); R max is the extreme value of weathered debris size (μm); V ( r < R i ) is the volume fraction of weathered debris with soil size less than R i (%); V T is the sum of the volume fraction of each size class (%).…”

Section: Methodsmentioning

confidence: 99%

Particle size composition characteristics of weathered debris from grey–green slate under the action of freeze–thaw and dry–wet cycles

Wang

et al. 2023

Sci Rep

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The material basis for soil formation is rock weathering debris. Understanding the particle size composition characteristics of rock weathering debris and its impacts is important for improving the soil structure of dry farmland in the central dry zone of Ningxia,China. In this study, the particle sizes of weathered debris collected from grey–green slate after indoor simulations of freeze–thaw and dry–wet cycles tests were examined. The results were as follows: (1) Under 16 treatments, the weathering debris of grey–green slate contained about 10% or less very fine sand and coarse silt, while clay, fine silt, and fine sand were the most abundant sizes (at least 60% of the total). (2) Under each treatment, the average particle size of the grey–green slate weathered debris was 5.52Ф (silt grade). The overall skewness was high, but the symmetry was poor. The particle size frequency distribution curve had many broad peaks or multiple peaks. (3) The fractal dimension was associated with very fine silt but had a strong negative correlation with fine sand and medium-coarse sand. The results indicate that fractal dimension can reflect the grain size characteristics of weathered debris. The mineral element content of the grey–green slate somewhat affected the fractal dimension, and it positively correlated with environmental electrical conductivity (EC) and element-leaching amount; it negatively correlated with particle size, temperature, and pH. According to the findings, the fractal dimension can accurately represent the particle size distribution of weathered debris. The generation of grey–green slate weathering debris should be considered in the formation and development of local soil.

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Section: Methodsmentioning

confidence: 99%

Particle size composition characteristics of weathered debris from grey–green slate under the action of freeze–thaw and dry–wet cycles

Wang

et al. 2023

Sci Rep

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“…First, the choice of mulching type is fundamental, since it drives the application rate, cost and effectiveness of mulching. There is a correlation between different soil covers and slope water infiltration rates [51]. Second, the amount of mulching also directly affects soil moisture evaporation, soil moisture infiltration and soil moisture runoff status [52].…”

Section: Main Progress and Landmark Achievements 321 Theoretical Rese...mentioning

confidence: 99%

Progress of Study on Interception of Soil Mulching with an Insight into Karst Soil Leakage Control: A Review

Xiong

Luo

et al. 2022

Land

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Soil erosion is a global issue of great concern, especially in karst areas with special environments, where subsurface soil leakage is closely related to soil erosion, which has become a key factor limiting agricultural development. To explore how to improve soil erosion in karst areas to enhance soil quality and maintain the sustainable use of the land in the long term, a total of 176 studies on the interception characteristics of soil mulching and erosion management were reviewed using a systematic review approach, through the WoS and CNKI databases. Firstly, quantitative analysis was conducted in terms of the annual volume, content and countries of the published literature. Secondly, from four aspects (theoretical research, mechanism research, technology research and technical demonstration), the main progress and landmark achievements of soil mulching interception and erosion management were classified. It is shown that the interception characteristics of soil mulching can produce an effective blockage for soil leakage in karst areas. Based on the global classification, compared to synthetic materials, natural materials have received more attention. We propose five key scientific questions that still need to be addressed. This review explores the insightful role of soil mulching for karst soil leakage management and aims to provide theoretical support for future research on sustainable land development in karst areas.

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Particle size composition characteristics of weathered debris from grey-green slate under the action of freeze-thaw and dry-wet cycles

Wang

et al. 2022

Preprint

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The material basis for soil formation is rock weathering debris. Understanding the particle size composition characteristics of rock weathering debris and its impacts is important for improving the soil structure of dry farmland in the central dry zone of Ningxia Hui Autonomous Region. In this study, the particle sizes of weathered debris collected from grey-green slate after indoor simulations of freeze-thaw and dry-wet cycle tests were examined. The results were as follows: (1) Under 16 treatments, the weathering debris of grey-green slate contained about 10% or less very fine sand and coarse silt, while clay, fine silt, and fine sand were the most abundant sizes (at least 60% of the total). (2) Under each treatment, the average particle size of the grey-green slate weathered debris was 5.52 (silt grade). The overall skewness was high, but the symmetry was poor. The particle size frequency distribution curve had many broad peaks or multiple peaks. (3) The fractal dimension was associated with very fine silt, but had a strong negative correlation with fine sand and medium-coarse sand. The results indicate that fractal dimension can reflect the grain size characteristics of weathered debris. The mineral element content of the grey-green slate somewhat affected the fractal dimension, and it positively correlated with environmental electrical conductivity (EC) and element-leaching amount; it negatively correlated with particle size, temperature, and pH. According to the findings, the fractal dimension can accurately represent the particle size distribution of weathered debris. The generation of grey-green slate weathering debris should be considered in the formation and development of local soil.

show abstract

Size Characteristics of Sediments Eroded under Different Masson Pine Litter Covers in South China

Cited by 3 publications

References 34 publications

Particle size composition characteristics of weathered debris from grey–green slate under the action of freeze–thaw and dry–wet cycles

Particle size composition characteristics of weathered debris from grey–green slate under the action of freeze–thaw and dry–wet cycles

Progress of Study on Interception of Soil Mulching with an Insight into Karst Soil Leakage Control: A Review

Particle size composition characteristics of weathered debris from grey-green slate under the action of freeze-thaw and dry-wet cycles

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