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[1]YANG Miaomiao,YANG Qinke,ZHANG Keli,et al.Research for the Factors Influencing the Stoniness Effect on Erodibility at Global Scale[J].Research of Soil and Water Conservation,2022,29(04):28-38.

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Research for the Factors Influencing the Stoniness Effect on Erodibility at Global Scale

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 04 Page number: 28-38 Column: Public date: 2022-06-20

Title:: Research for the Factors Influencing the Stoniness Effect on Erodibility at Global Scale

Author(s):: YANG Miaomiao¹, YANG Qinke¹, ZHANG Keli², WANG Chunmei¹, PANG Guowei¹, LI Yuru^1,3; (1.College of Urban and Environment, Northwest University, Xi'an 710127, China; 2.College of Geography, Beijing Normal University, Beijing 100875, China; 3.The First Institute of Geoinformation Mapping, Ministry of Natural Resources, Xi'an 710054, China)

Keywords:: stoniness effect on erodibility; rock cover; soil erodibility; environmental elements

CLC:: S157.1

DOI:: -

Abstract:: In order to comprehensively understand the effect of rock fragments in the soil on the soil erodibility factor(K), i.e. the stoniness effect on erodibility(SE_K), the effect of rock fragments on the surface(S_t), the effect of rock fragments in profile(K_cf), the joint effect of rock fragments in profile and rock fragments on the surface(K_f-cs)and some environmental factors such as elevation, slope, slope aspect, vegetation coverage(NDVI), land use, annual average precipitation and annual average temperature at a global scale were used to explore the spatial pattern of SE_K and the main controlling factors affecting SE_K through correlation analysis, pattern analysis and random forest regression analysis. The results show that:(1)elevation and slope are positively correlated with SE_K; vegetation coverage(NDVI), precipitation and temperature are negatively correlated with S_t and K_f-cs, precipitation is negatively correlated with K_cf, and temperature is positively correlated with K_cf; the influence of rock fragments on southern(sunlit)slopes is found to be greater than that on northern(shaded)slopes; the influence of rock fragments on cropland and forest is slight, while the influence of rock fragments on grassland, desert and bare land is relative heavy;(2)the main controlling factors of S_t and K_f-cs are elevation and slope; the main controlling factors of K_cf are precipitation and temperature. Therefore, in the evaluation of soil erosion in large regions, special attention should be paid to areas with large content of rock fragments, higher altitude and higher slope, otherwise the evaluation results of soil erosion will be biased.

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Last Update: 2022-06-20