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[1]Zou Huijie,Liu Gang,Shu Chengbo,et al.Spatial distribution characteristics of soil erosion on typical black soil slopes in Inner Mongolia's agricultural and pastoral intertwined areas[J].Research of Soil and Water Conservation,2025,32(01):13-20.[doi:10.13869/j.cnki.rswc.2025.01.040]

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Spatial distribution characteristics of soil erosion on typical black soil slopes in Inner Mongolia's agricultural and pastoral intertwined areas

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 32 Number of periods: 2025 01 Page number: 13-20 Column: Public date: 2025-01-10

Title:: Spatial distribution characteristics of soil erosion on typical black soil slopes in Inner Mongolia's agricultural and pastoral intertwined areas

Author(s):: Zou Huijie^1,2,3, Liu Gang^1,2,4, Shu Chengbo⁴, Sun Bo⁴, Liu Ya⁴, Zhang Qiong^1,2,4, Guo Zhen⁵; (1.State Key Laboratory of Soil Erosion and Dryland Agriculture,The Research Center of Soil and Water Conservation and Ecological Environment,Chinese Academy of Sciences and ministry of Education,Yangling,Shaanxi 712100,China; 2.Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling,Shaanxi 712100,China; 3.University of Chinese Academy of Sciences,Beijing 100049,China; 4.State Key Laboratory of Soil Erosion and Dryland Agriculture...)

Keywords:: soil erosion; typical black soil; farming-pastoral zone; wavelet analysis

CLC:: S157.1

DOI:: 10.13869/j.cnki.rswc.2025.01.040

Abstract:: [Objective]To quantify the rate of soil erosion in typical black soil areas of Inner Mongolia, investigate the spatial distribution characteristics of soil erosion in the region, and elucidate the spatial distribution patterns of slopes and regions soil erosion. The aim is to provide references for regional soil erosion management. [Methods]In this study, soil samples were collected from typical black soil sloping cropland in Inner Mongolia's agricultural and pastoral intertwined areas(Hailar District, Erguna City, and Yakeshi City). The ¹³⁷Cs tracer technology was utilized to calculate the soil erosion rate at each sampling point. Additionally, the method of wavelet analysis was employed to investigate the distribution characteristics of soil erosion on the slopes. [Results](1)All sampling points on all three slopes had ¹³⁷Cs levels lower than the background value(1 984.24 Bq/m²), indicating soil erosion on all slopes.(2)The average erosion rate of the slopes in the three areas was in the order that Hailar 〔6 533.37 t/(km²·a)〕> Erguna 〔4 174.35 t/(km²·a)〕> Yakeshi 〔2 765.87 t/(km²·a)〕. The average erosion rates of the three longitudinal sections of the same slope were similar, but the coefficient of variation of the erosion rates within the same section was high.(3)The soil erosion rate varied periodically of strength and weakness along the slope length, but the cycle length was not constant. The most of longitudinal sections exhibited two cycles of change. The small cycle ranges from 80 to 160 m, while the large cycle ranges from 160 to 200 m. Some longitudinal sections only had one cycle of change, with a length ranging from 100 to 120 m. [Conclusion]Soil erosion in this area exhibits full-slope erosion at the slope scale and displays cyclic characteristics in the longitudinal direction. There is a gradual increase trend from east to west at the regional scale. The findings of this study can offer a scientific basis and data support for soil erosion management in the study area.

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Last Update: 2025-01-10