[1]Du Fangyue,Liu June,Niu Baicheng,et al.Soil anti-scourability and influencing factors in the transition zone between the Qinghai-Xizang Plateau and Loess Plateau[J].Research of Soil and Water Conservation,2025,32(01):39-47.[doi:10.13869/j.cnki.rswc.2025.01.011]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
32
Number of periods:
2025 01
Page number:
39-47
Column:
Public date:
2025-01-10
- Title:
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Soil anti-scourability and influencing factors in the transition zone between the Qinghai-Xizang Plateau and Loess Plateau
- Author(s):
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Du Fangyue1, Liu June1, Niu Baicheng2,3, Zhu Qiming1, Cui Qinkai1
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(1.School of Geography and Tourism,Shaanxi Normal University,Xi'an 710119,China; 2.Qinghai Provincial Key Laboratory of Physical Geography and Environmental Processes,School of Geographical Sciences,Qinghai Normal University,Xining 810008,China; 3.Key Laboratory of Land Surface Processes and Ecological Conservation of the Qinghai-Xizang Plateau,Ministry of Education,Qinghai Normal University,Xining 810008,China)
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- Keywords:
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Qinghai-Xizang Plateau-Loess Plateau transitional zone; soil anti-scourability; physicochemical properties; shear stress
- CLC:
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S157.1
- DOI:
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10.13869/j.cnki.rswc.2025.01.011
- Abstract:
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[Objective]The aims of this study are to explore soil anti-scourability and influencing factors, and to provide a scientific basis for soil erosion prevention and ecological construction in the transitional zone between the Qinghai-Xizang Plateau and Loess Plateau. [Methods]In the upper, middle and lower reaches of the Shagou River Basin in Hainan Xizangan Autonomous Prefecture, Qinghai Province(sample plots 1, 2 and 3), typical chestnut soil and aeolian sandy soil were selected. The undisturbed soil scouring method(2, 3, 4, 5 and 6 L/min)was used to test the soil anti-scourability. The responses of soil anti-scourability to various factors such as soil physicochemical properties and hydrodynamic conditions were studied. The soil anti-scourability equation was constructed accordingly. [Results]The scouring intensity of three plots showed the maximum, and then decreased and then flattened, and the soil anti-scourability showed an order:sample plot 1>sample plot 3>sample plot 2, and the runoff sediment content decreased as a power function with the scouring duration. There were significant differences in soil physical and chemical properties among the three plots, and soil anti-scourability was significantly correlated with bulk density, WSA>0.25 mm, organic matter, and mean weight diameter. Relationships of shear stress and soil anti-scourability were well fitted by power function(R2>0.98, p<0.05). Based on the comprehensive consideration of dynamics and resistance for soil erosion, the soil anti-scourability equation was constructed based on main factors of shear stress, mean weight diameter and organic matter. [Conclusion]Anti-scourability of chestnut soil is better than aeolian sandy soil. The soil anti-scourability equations based on the mean weight diameter and shear stress, organic matter and shear stress, and mean weight diameter, organic matter and shear stress all fit well.