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[1]ZHENG Xiaolan,YANG Ling,SONG Jiao,et al.Fractal Characteristics and Spatial Variation of Soil Particle Composition in the Reservoir Riparian Zone[J].Research of Soil and Water Conservation,2022,29(01):66-71.

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Fractal Characteristics and Spatial Variation of Soil Particle Composition in the Reservoir Riparian Zone

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 01 Page number: 66-71 Column: Public date: 2022-02-20

Title:: Fractal Characteristics and Spatial Variation of Soil Particle Composition in the Reservoir Riparian Zone

Author(s):: ZHENG Xiaolan^1,2, YANG Ling^1,2, SONG Jiao^1,3, BAO Yuhai¹, LI Jinlin^1,2, HE Xiubin¹; (1.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China; 2.University of Chinese Academy of Sciences, Beijing 100049, China; 3.School of Geography and Tourism Science, Chongqing Normal University, Chongqing 401331, China)

Keywords:: soil particle composition; volume fractal dimension; spatial distribution; reservoir riparian zone

CLC:: S152.3

DOI:: -

Abstract:: As the basic physical properties of soil, particle composition has obvious effects on soil structure, mechanical properties, and fertility characteristics. The periodic flooding and exposure process resulte in the redistribution of surface soil particles in the reservoir riparian zone. In order to study the spatial differentiation characteristics of soil particle composition, the Three Gorges Reservoir was taken as the research object and the volume-based fractal model of soil particle was evaluated. The results suggest that:(1)the soil in the reservoir riparian zone of the Three Gorges Reservoir is dominated by silt, accounting for 72.6% to 86.5% of the total volume, and it increases with the increase in altitude; from the perspective of different soil depths, the clay content in the 0—10 cm soil layer is significantly lower than that in the 10—20 cm soil layer;(2)the volumetric fractal dimension showes significant heterogeneity at different elevations, and is positively correlated with elevations(R²=0.74), while the weak variability between different soil layers is found(C_v<2);(3)the volumetric fractal dimension has a significant positive correlation with clay and silt contents(p<0.01), and a significant negative correlation with sand content(p<0.01); the linear correlation between fractal dimension and clay is the strongest. In summary, the composition of soil particles in the reservoir riparian zone differs greatly at different elevations(p<0.01), but there is no significant difference in soil depth(p>0.01). The soil coarse-grained phenomenon is obvious in the elevation range of 150～160 m and soil layer of 0—10 cm.

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Last Update: 2022-02-20