Quantitative evaluation of soil anti-erodibility in the fluctuation zones of rooted soil in a large reservoir, southwest of China
Pengcheng Wang, Xinghan Niu, Henglin Xiao, Gaoliang Tao, Zexi Song, Somayeh Soltani-Gerdefaramarzi, Somayeh Soltani-Gerdefaramarzi, Somayeh Soltani-Gerdefaramarzi, Somayeh Soltani-Gerdefaramarzi
TL;DR
This study evaluates how soil resists erosion in a Chinese reservoir area, identifying factors like soil structure and water levels that influence erosion resistance.
Contribution
The study introduces a comprehensive model for assessing soil erosion resistance using physicochemical properties and water level variations in reservoir zones.
Findings
Soil erodibility factor K is strongly correlated with porosity, sand content, and aggregate stability but not with bulk density or pH.
A PCA-based model was developed to evaluate soil erosion resistance using 14 indicators in the Guanyinyan Reservoir area.
The Comprehensive Soil Erosion Index (CSEI) increases with decreasing flooding time and is higher in un-rooted soil zones compared to root zone soils.
Abstract
The quantitative analysis of key factors influencing the erosion resistance characteristics of colluvial zone soil is a prerequisite for accurately assessing the erosion resistance ability of the soil. Therefore, this study focuses on the reservoir erosion zone of the Guanyinyan Reservoir area in the Jinsha River Basin, which is a large hydropower station. The physicochemical characteristics of the colluvial zone soil (bulk density, moisture content, total porosity, soil texture, pH, organic matter content, and aggregate stability) as well as erosion resistance capabilities (soil erodibility factor K and shear strength) with variations in water level elevation (low, middle, and high elevations) were analyzed. This study quantitatively evaluated the relative importance of soil physicochemical characteristics to soil erosion resistance, identified key influencing factors, and subsequently…
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Taxonomy
TopicsSoil erosion and sediment transport · Dam Engineering and Safety · Soil and Unsaturated Flow