• DOI:10.1061/(ASCE)HY.1943-7900.0001147
• Corpus ID: 131125494

Comparison of Linear and Nonlinear Models for Cohesive Sediment Detachment: Rill Erosion, Hole Erosion Test, and Streambank Erosion Studies

@article{Khanal2016ComparisonOL,
  title={Comparison of Linear and Nonlinear Models for Cohesive Sediment Detachment: Rill Erosion, Hole Erosion Test, and Streambank Erosion Studies},
  author={Anish Khanal and K. R. Klavon and Garey A. Fox and Erin R. Daly},
  journal={Journal of Hydraulic Engineering},
  year={2016},
  volume={142},
  pages={04016026}
}

• A. Khanal, K. Klavon, +1 author E. Daly
• Published 9 May 2016
• Engineering
• Journal of Hydraulic Engineering

AbstractCohesive sediment detachment is typically modeled for channels, levees, spillways, earthen dams, and internal erosion by using a linear excess shear stress approach. However, mechanistic nonlinear detachment models, such as the Wilson model, have recently been proposed in the literature. Questions exist as to the appropriateness of nonlinear relationships between applied shear stress and the erosion rate. Therefore, the objective of this research was to test the appropriateness of linear and nonlinear detachment models for cohesive sediment detachment using three data sets: (1) rill erodibility studies across a limited range of applied shear stress (0.9–21.4 Pa), (2) hole erosion tests (HETs) across a wide range of applied shear stress (12.6–62.0 Pa), and (3) streambank erodibility as quantified by jet erosion tests (JETs) for the linear excess shear stress equation and the nonlinear Wilson model across a small range of shear stress (1–4 Pa). The Wilson model was also incorporated into the bank st...