Investigation of Rate of Erosion of Soils in Embankment Dams

Wan, Chi Fai; Fell, Robin

doi:10.1061/(asce)1090-0241(2004)130:4(373)

Cited by 396 publications

(219 citation statements)

References 16 publications

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“…where K c is the coefficient of erosion (with values ranging from 10 −1 to 10 −6 s m −1 [20]) and τ cr is a critical shear stress (with values ranging from 6 to 160 N m −2 [21]), both material-dependent. Other models replace the shear stress by the stream power as the controlling parameter but experimental evidence seems to indicate that the shear force model is appropriate, both for laboratory and in situ cases [28].…”

Section: Erosion Due To a Flowmentioning

confidence: 99%

“…(11). Following [20,25], an approximation can be used to derive the hydraulic shear stress as a function of the gradient of the hydraulic head,…”

Section: Erosion Due To a Flowmentioning

confidence: 99%

“…Apart from its interest in showing the numerical accuracy of the level set representation, this example is also, to the knowledge of the authors, the first application of level sets to this problem, for which it seems appealing. Indeed, piping is one the main causes of failure of dams and embankments, while its modeling is still based on semi-analytical [19] or experimental [20,21] approaches. In particular, the semi-analytical approaches are heavily dependent on symmetry hypotheses that are probably not very relevant in practice.…”

Section: Introductionmentioning

confidence: 99%

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Modeling, with a unified level-set representation, of the expansion of a hollow in the ground under different physical phenomena

2009

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This paper builds on the flexibility of the level-set representation to model in a unified manner the expansion of a hollow in the ground under different physical phenomena. In particular, the dissolving action of a flow of water in a saturated soil, and that of a jet of particles of water in a nonsaturated one, are represented in a common framework. In that manner, the complex geometrical evolutions of the hollow can be followed without the need for remeshing and this approach allows for a smooth transition between saturated and non-saturated models of the soil. Implementation and numerical difficulties are discussed and two applications of industrial interest are considered. The first one describes the modeling of the piping phenomenon, and the second one the evolution of an excavation created by a leaking duct.

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Section: Erosion Due To a Flowmentioning

confidence: 99%

“…(11). Following [20,25], an approximation can be used to derive the hydraulic shear stress as a function of the gradient of the hydraulic head,…”

Section: Erosion Due To a Flowmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling, with a unified level-set representation, of the expansion of a hollow in the ground under different physical phenomena

2009

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“…He eventually concluded that the "design storm" specified by congressionally authorized projects deserve reconsideration, and that engineering design reviews should be reorganized and implemented. Wan and Fell (2004) describe the development of two erosion rate tests, the Hole Erosion Test (HET) and Soil Erosion Test (SET), which measure soil erodibility. Using an Erosion Function Apparatus (EFA), Briaud et al (2008) investigated the erodibility of several different types of soil.…”

Section: Introductionmentioning

confidence: 99%

Validation of Erosion Modeling: Physical and Numerical

Kamalzare¹,

Stuetzle²,

Chen³

et al. 2012

GeoCongress 2012

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The overall intent of this research is to develop numerical models of erosion of levees, dams and embankments, validated by physical models. The physical models are performed at 1-g and at high g's using a geotechnical centrifuge. The erosion is modeled in detail, from beginning to end, that is from the time the levee is overtopped until the levee is breached. Typical quantities measured as a function of time are the depth, width and volume of rills, number of junction points, are the rills straight or meandering, sediment transport quantities, and finally breach. This data can be obtained from the numerical modeling, but is difficult to obtain from the physical modeling. Video images indicate the physical modeling agrees quite well with the numerical modeling. A comparison has also been done between observed breaching width and the FEMA new formula for both 1-g and centrifuge tests.

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“…Desiccation induced failures are deemed to become increasingly 53 important as progressively more extreme weather conditions are predicted by climatologists 54 to take place worldwide (Milly et al, 2002). Allsop internal erosion (Wan and Fell, 2004). In particular, the presence of cracks can substantially 61 decrease the resistance of embankments with regard to overtopping and internal erosion 62 which alone count for 34 and 28 percent respectively of all the embankment failures in the 63 world (Wu et al, 2011).…”

mentioning

confidence: 99%

Novel Approach for Health Monitoring of Earthen Embankments

Utili

Castellanza

Galli

et al. 2015

J. Geotech. Geoenviron. Eng.

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The proposed methodology was used and validated on a recently built 2 km long river 29 embankment in Galston (Scotland, UK). A suite of geotechnical probes was installed to 30 monitor the seasonal variation of water content over a two-year period. Most devices were 31 calibrated in-situ. A novel procedure to extrapolate the value of water content from the 32 geotechnical and geophysical probes in any point of the embankment is illustrated. 33Desiccation fissuring degrades the resistance of embankments against several failure 34mechanisms. An index of susceptibility is here proposed. The index is a useful tool to assess 35 the health state of the structure and prioritise remedial interventions. 36 37 2

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Investigation of Rate of Erosion of Soils in Embankment Dams

Cited by 396 publications

References 16 publications

Modeling, with a unified level-set representation, of the expansion of a hollow in the ground under different physical phenomena

Modeling, with a unified level-set representation, of the expansion of a hollow in the ground under different physical phenomena

Validation of Erosion Modeling: Physical and Numerical

Novel Approach for Health Monitoring of Earthen Embankments

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