Mechanistic Detachment Rate Model to Predict Soil Erodibility Due to Fluvial and Seepage Forces

Al-Madhhachi, Abdul-Sahib T.; Fox, Garey A.; Hanson, Gregory J.; Tyagi, Avdhesh K.; Bulut, Rifat

doi:10.1061/(asce)hy.1943-7900.0000836

Cited by 29 publications

(26 citation statements)

References 17 publications

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“…The mechanistic parameters (b 0 and b 1 ) explained the physical behavior of empirical parameters of excess shear stress parameters (k d and τ c ). Previous studies (Al-Madhhachi et al, 2013b, 2014a, 2014bDaly et al, 2013Daly et al, , 2015 as well as to this study show that the parameter b 0 has same behavior to k d but with different magnitude and the parameter b 1 has same behavior to τ c but with different magnitude. …”

Section: Influence Of Lead Pollution On Non-linear Model Parameterssupporting

confidence: 72%

“…The Wilson model was developed by Wilson (1993aWilson ( , 1993b to describe the detachment of single or aggregate soil particles depending on two mechanistic dimensional soil parameters: b 0 and b 1 . Several studies measure the erodibility of soils using different techniques; Large flumes (Hanson, 1990a;Hanson and Cook, 2004), small flumes (Briaud et al, 2001), laboratory hole erosion test (Wan & Fell, 2004), and a jet erosion test (Hanson, 1990b;Hanson & Cook, 2004;Al-Madhhachi et al, 2013a, 2013b, 2014a, 2014b, which is the focused of this study.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Lead Pollution on Cohesive Soil Erodibility using Jet Erosion Tests

Salah¹,

Al-Madhhachi²

2016

ENRR

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Recent researches were investigated the high concentrations of Lead in Baghdad soils due to the emissions from Leaded fuel of cars, generators, and the industrials. These high concentrations in addition to their impact on human health may impact on the landscape and streambanks and may cause significant issues on soil erodibility. The erosion rate of cohesive soil was usually estimated using two alternative models, excess shear stress model which is depended on two major soil parameters: the critical shear stress, τ c , and the erodibility coefficient, k d , and Wilson model which is depended on two mechanistic soil parameters: b 0 and b 1 . A new miniature version of Jet Erosion Test ("mini" JET) was performed to derive both model parameters. The objective of this study was to investigate the influence of Lead pollution on cohesive soil erodibility using "mini" JET under controlled laboratory setups to predict soil erodibility. In order to observe the Lead contamination on soil erodibility, soil samples were mixed with different quantities of Lead concertation and the samples were packed at ASTM standard mold on two different bulk densities. Results show that the Lead pollution increased soil erodibility when the concentration of Lead increased. An inverse relationship between excess shear stress parameters k d and τ c was observed as well as between Wilson model parameters b 0 and b 1 . The Wilson model parameters were closely resembled the empirical excess shear stress parameters with benefit that Wilson model parameters are mechanistic parameters.

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Section: Influence Of Lead Pollution On Non-linear Model Parameterssupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Influence of Lead Pollution on Cohesive Soil Erodibility using Jet Erosion Tests

Salah¹,

Al-Madhhachi²

2016

ENRR

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“…The field needs to move to more process-based, mechanistic detachment models for fluvial erosion. Recent research has proposed such models with parameters that can be derived from JETs (Al-Madhhachi et al 2014). Finally, erosion and failure of streambanks typically occurs from isolated extreme events where the banks are primed for erosion and mass wasting to occur.…”

Section: Streambank Research Needsmentioning

confidence: 99%

Reservoir Sedimentation and Upstream Sediment Sources: Perspectives and Future Research Needs on Streambank and Gully Erosion

Fox

Sheshukov

Cruse

et al. 2016

Environmental Management

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Abstract. The future reliance on water supply and flood control reservoirs across the globe will continue to expand, especially under a variable climate. Construction of additional reservoirs is less likely compared to simultaneous flow and sediment management in existing reservoirs. One aspect of this sediment management is related to the control of upstream sediment sources.However, key research questions remain regarding upstream sediment loading rates. Highlighted in this article are research needs relative to measuring sediment transport rates and loading due to streambank and gully erosion within a watershed. For example, additional in-stream sediment transport and reservoir sedimentation rate measurements are needed across a range of watershed conditions, reservoir sizes, and geographical locations. More research is needed to understand the intricate linkage between upland practices and in-stream response. A need still exists to clarify the benefit of restoration or stabilization of a small-reach within a channel system or maturing gully on total watershed sediment load. We need a better understanding of the intricate interactions between hydrological and erosion processes to improve prediction, location, and timing of streambank erosion and failure and gully formation. Also, improved process-based measurement and prediction techniques are needed that balance data requirements regarding cohesive soil erodibility and stability as compared to simpler topographic indices for gullies or stream classification systems. Such techniques will allow the research community to address the benefit of various conservation and/or stabilization practices at targeted locations within watersheds.

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“…layered soils with a shallow waterrestricting horizon, have a limited soil water storage capacity above the restricting layer that, once filled, can result in lateral flow and seepage at the surface (McDaniel et al, 2008). Such surface seepage increases surface runoff and the seepage gradient forces affect the erosion properties of the soil surface (Nouwakpo et al, 2010;Al-Madhhachi et al, 2014a, 2014b which increase the propensity for gully erosion by surface flow (Huang and Laflen, 1996;Huang et al, 1999). However, subsurface flow contributes directly to gully erosion by seepage erosion and internal erosion of soil pipes (Fox and Wilson, 2010).…”

Section: Introductionmentioning

confidence: 99%

Sediment detachment and transport processes associated with internal erosion of soil pipes

Wilson

Wells

Kuhnle

et al. 2017

Earth Surf Processes Landf

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Subsurface flow can be an important process in gully erosion through its impact on decreasing soil cohesion and erosion resistance as soil water content or pressure increases and more directly by the effects of seepage forces on particle detachment and piping. The development of perched water tables fosters lateral flow that can result in seepage at the surface and/or formation of soil pipes by internal erosion of preferential flow paths. Continued internal erosion of soil pipes can lead to gullies, dam and levee failures. However, the processes involved in particle and aggregate detachment from soil pipe walls and transport processes within soil pipes have not been well studied or documented. This paper reviews the limited research on sediment detachment and transport in macropores and soil pipes and applies the knowledge learned from the much more extensive studies conducted on streams and industrial pipes to hydrogeologic conditions of soil pipes. Knowledge gaps are identified and recommendations are made for future research on sediment detachment and transport in soil pipes. Copyright © 2017 John Wiley & Sons, Ltd.

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Mechanistic Detachment Rate Model to Predict Soil Erodibility Due to Fluvial and Seepage Forces

Abstract: Results-Predicting the Influence of Seepage Background General Theoretical Framework Including Seepage • The erosion rate of cohesive soils is typically computed using an excess shear stress model based on the applied fluvial shear stress.

Cited by 29 publications

References 17 publications

Influence of Lead Pollution on Cohesive Soil Erodibility using Jet Erosion Tests

Influence of Lead Pollution on Cohesive Soil Erodibility using Jet Erosion Tests

Reservoir Sedimentation and Upstream Sediment Sources: Perspectives and Future Research Needs on Streambank and Gully Erosion

Sediment detachment and transport processes associated with internal erosion of soil pipes

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