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Study on Parameters of Two Widely Used Cohesive Soils Erosion Models

The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China
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Author to whom correspondence should be addressed.
Current address: College of Architecture and Civil Engineering, Beijing University of Technology, No.100, Pingleyuan, Chaoyang District, Beijing 100124, China.
Water 2021, 13(24), 3621; https://doi.org/10.3390/w13243621
Received: 8 November 2021 / Revised: 8 December 2021 / Accepted: 12 December 2021 / Published: 16 December 2021
(This article belongs to the Section Water Erosion and Sediment Transport)
The erosion rate of cohesive soils was typically modeled with the excess shear stress model and the Wilson model. Several kinds of research have been conducted to determine the erodibility parameters of the two models, but few attempts have been made hitherto to investigate the general trends and range of the erodibility parameter values obtained by the commonly used Erosion Function apparatus. This paper collected a database of 177 erosion function apparatus tests to indicate the variability of all erodibility parameters; the range of erodibility parameters is determined by data statistics and parameter theoretical value derivation. The critical shear stress (τc) and erodibility coefficient (Z0) in the over-shear stress model have a positive proportional relationship when the data samples are sufficient. However, there is no such relationship between the erodibility coefficient (b0) and erodibility coefficient (b1) in the Wilson model. It is necessary to express the soil erosion resistance by considering all erosion parameters in the erosion model. Equations relating erodibility parameters to water content, plasticity index, and median particle size were developed by regression analysis. View Full-Text
Keywords: cohesive soils; detachment rate model; soil erosion; erodibility parameter; regression analysis; erosion function apparatus cohesive soils; detachment rate model; soil erosion; erodibility parameter; regression analysis; erosion function apparatus
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MDPI and ACS Style

Wang, Q.; Zhou, P.; Fan, J.; Qiu, S. Study on Parameters of Two Widely Used Cohesive Soils Erosion Models. Water 2021, 13, 3621. https://doi.org/10.3390/w13243621

AMA Style

Wang Q, Zhou P, Fan J, Qiu S. Study on Parameters of Two Widely Used Cohesive Soils Erosion Models. Water. 2021; 13(24):3621. https://doi.org/10.3390/w13243621

Chicago/Turabian Style

Wang, Qiusheng, Pengzhan Zhou, Junjie Fan, and Songnan Qiu. 2021. "Study on Parameters of Two Widely Used Cohesive Soils Erosion Models" Water 13, no. 24: 3621. https://doi.org/10.3390/w13243621

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