Using an Improved Jet-Erosion Test to Study the Influence of Soil Parameters on the Erosion of a Silty Soil

Nguyen, Van-Nghia; Courivaud, Jean-Robert; Pinettes, Patrick; Souli, Hanène; Fleureau, Jean‐Marie

doi:10.1061/(asce)hy.1943-7900.0001305

Cited by 18 publications

(4 citation statements)

References 36 publications

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“…New designs should be considered that make the instrument more user-friendly. Nguyen et al (2017) proposed a modified version of Hanson's (1990Hanson's ( , 1991 original JET in which the scour depth sensor can be rotated along an arc to measure the erosion profile rather just the scour at the center of the sample. This modification allows determination of the volume of soil eroded by the jet.…”

Section: Lessons Learned Laboratory and Field Implementationmentioning

confidence: 99%

Perspective: Lessons Learned, Challenges, and Opportunities in Quantifying Cohesive Soil Erodibility with the Jet Erosion Test (JET)

Fox¹,

Guertault²,

Castro‐Bolinaga³

et al. 2022

Journal of the ASABE

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HighlightsThe JET is a key instrument for in situ and laboratory measurement of soil erodibility.Operation and reporting guidelines are needed to ensure consistency across JETs and applications.JET design improvements and hydrodynamic studies are needed to inform proper analyses and limit operator effects.Erodibility databases should be developed that report JET, soil, and fluid properties. Keywords: Cohesive soils, Critical shear stress, Erodibility, Erosion, Jet Erosion Test, Scour.

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Section: Lessons Learned Laboratory and Field Implementationmentioning

confidence: 99%

Perspective: Lessons Learned, Challenges, and Opportunities in Quantifying Cohesive Soil Erodibility with the Jet Erosion Test (JET)

Fox¹,

Guertault²,

Castro‐Bolinaga³

et al. 2022

Journal of the ASABE

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“…The diagram and tables reported by Hanson et al () can provide guidance for defining the range of variability of these parameters. Moreover, some authors suggest empirical relationships between τ c and k d (e.g., Hanson & Simon, ; Nguyen et al, ); Wu () also reports an empirical formula for computing the erodibility coefficient (based on the clay content and the dry specific weight of the soil), which can help in the choice of reasonable values when specific erosion tests cannot be performed.…”

Section: Model Descriptionmentioning

confidence: 99%

“…Different test configurations and interpretations of results lead to different estimates for k d and τ c (Khanal et al, ), and even the use of a linear erosion law is still debated (Walder, ). Moreover, these parameters are observed to be quite sensitive not only to the type of material, in particular to soil texture and plasticity, but also to the compaction effort and water content (Fell et al, ; Nguyen et al, ; Wahl et al, ), with a variability up to 2–3 orders of magnitude (Hanson & Hunt, ). Therefore, the choice of erodibility parameters must be carefully considered, and the uncertainty in their values must be properly taken into account by means of a sensitivity analysis when data for calibration are not available.…”

Section: Model Descriptionmentioning

confidence: 99%

Integration of a Levee Breach Erosion Model in a GPU‐Accelerated 2D Shallow Water Equations Code

Dazzi

Vacondio

Mignosa

2019

Water Resources Research

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This paper presents a two‐dimensional shallow water equations code coupled with a physically based erosion model, able to predict the opening and evolution of breaches forming in levees built with either cohesive or noncohesive material. The bottom elevation change is evaluated using an excess shear‐stress equation, which accounts for the hydrodynamic conditions and for the material characteristics. The proposed model modifies the local topography at runtime wherever the levee is overtopped without having to predefine the position and shape of the breach. The model is implemented in CUDA programming language, so that simulations can be run on graphics processing units, guaranteeing fast execution times even for high‐resolution meshes and large domains. The validation is performed based on several experimental tests, and numerical predictions are in good agreement with the measurements. The strengths and weaknesses of the proposed approach are also discussed by comparison with a sediment transport model based on the Exner equation: While the latter gives good results only for breaches forming in levees built with noncohesive material, the proposed model can also be applied to cohesive embankments. The application to a historical flood event is also presented, showing that the model can effectively be employed for real field simulations also in the case of multiple breaches.

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“…In recent years, significant progress has been made to show the effect of grain size on erosion potential. However, fewer research studies have quantified the impact of other geotechnical propertieseven though they can also have a significant impact on the mechanisms that govern the erosion of coarsegrained soil particles (Sturm, 2001;Van Rijn, 2007;Nguyen et al, 2017). Thus, this study aims to determine the effect of other geotechnical properties on the erosion characteristics of coarse grains, as well as the effect of median particle size, which has previously relied on a simplified analysis that needs to be improved.…”

Section: Introductionmentioning

confidence: 99%

Laboratory and theoretical evaluation of impact of packing density, particle shape, and uniformity coefficient on erodibility of coarse‐grained soil particles

Choo

Zhao

Burns

et al. 2020

Earth Surf Processes Landf

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Sedimentation – including erosion, transport, and deposition of coarse‐grained particles – is a primary and growing environmental, engineering, and agricultural issue around the world. Soil erosion occurs when the hydrodynamic force induced by flowing water exceeds the geotechnical resistance of soils, as measured by critical shear stress for initiation of soil‐particle motion. Even though various quantitative methods have been suggested with respect to different types of soil, the most widely accepted formula to estimate critical shear stress for coarse‐grained soil is a direct function of the median grain size of the soil particles; however, the erosion resistance of soils also varies with other geotechnical properties, such as packing density, particle shape, and uniformity coefficient. Thus, in this study, a combined rolling–lift model for particle detachment was derived based on theoretical analysis. A series of experimental flume tests were conducted with specimens prepared with standard soil types, as well as laboratory‐prepared mixtures of coarse‐grained soil to validate the theoretical model and determine the effect of other geotechnical properties on the erosion characteristics of coarse grains, coupled with the effect of median particle size. The results indicated that the median grain size is the primary variable determining the resistance of coarse grains, but the critical shear stress also varies with the packing density of the soil matrix. In addition, angular particles show more erosion resistance than rounded particles, and the erosion potential of a soil decreased when the grain is well graded (higher value of uniformity coefficient). Additionally, regression analysis was performed to quantify the effect of each parameter on the critical shear stress of coarse grains. © 2020 John Wiley & Sons, Ltd.

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Using an Improved Jet-Erosion Test to Study the Influence of Soil Parameters on the Erosion of a Silty Soil

Cited by 18 publications

References 36 publications

Perspective: Lessons Learned, Challenges, and Opportunities in Quantifying Cohesive Soil Erodibility with the Jet Erosion Test (JET)

Perspective: Lessons Learned, Challenges, and Opportunities in Quantifying Cohesive Soil Erodibility with the Jet Erosion Test (JET)

Integration of a Levee Breach Erosion Model in a GPU‐Accelerated 2D Shallow Water Equations Code

Laboratory and theoretical evaluation of impact of packing density, particle shape, and uniformity coefficient on erodibility of coarse‐grained soil particles

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