Rill erosion: Exploring the relationship between experiments, modelling and field observations

Govers, Gérard; Giménez, Rafael; Oost, Kristof Van

doi:10.1016/j.earscirev.2007.06.001

Cited by 241 publications

(202 citation statements)

References 75 publications

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“…The influence of runoff/rainfall intensity on rill erosion is a question which is often investigated. Other parameters often tested are slope length, percolation, rill development, critical Froude number, critical shear stress of different soil characteristics, slope, flow velocity or flow velocity distribution, bed morphology and flow area (Govers et al 2007). Bryan and Poesen (1989) tested the relationship between slope length, percolation, runoff and rill development in the laboratory experiments.…”

mentioning

confidence: 99%

The characteristics of rill development and their effects on runoff and sediment yield under different slope gradients

Sun

Gong

et al. 2016

J. Mt. Sci.

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confidence: 99%

The characteristics of rill development and their effects on runoff and sediment yield under different slope gradients

Sun

Gong

et al. 2016

J. Mt. Sci.

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“…Factors affecting rill characteristics include the stress caused by the flow, roughness of the soil surface, slope gradient and soil erodibility (Mancilla, et al 2005). However, Govers, et al 2007 stated that erodibility within a rill may vary with its depth, which can decrease the erosion process in granular soils, as a result of a reduced slope gradient. If a more erodible soil underlies the surface soil, however, the erosion rate in a rill or gully will actually be accelerated.…”

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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“…During the last decades, several approaches have been developed to describe and predict soil detachment and sediment transport in rills in a reliable way [7,21,22]. In contrast, the factors influencing the development and the behaviour of rills have not been comprehensively assessed yet.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, it is influenced by the intrinsic characteristics of the soils [2][3][4] and rainfall intensity [5,6]. In contrast, rill erosion is caused by a concentrated overland flow [6][7][8]. This is considered to be the most important process of sediment erosion and soil loss [9,10].…”

Section: Introductionmentioning

confidence: 99%

Soil Erosion on Abandoned Land in Andalusia: A Comparison of Interrill- and Rill Erosion Rates

et al. 2012

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The present paper is based on several field investigations (monitoring soil and rill erosion by aerial photography, rainfall simulations with portable rainfall simulators, and manmade rill flooding) in southern Spain. Experiments lead now to a closer understanding of the dynamics and power of different soil erosion processes in a gully catchment area. The test site Freila (Andalusia, Spain) covers an area of 10.01 ha with a rill density of 169 m ha −1 , corresponding to a total rill length of 1694 m. Assuming an average rill width of 0.15 m, the total rill surface can be calculated at 250 m 2 (0.025 ha). Given that, the surface covered by rills makes up only 0.25% of the total test site. Since the rill network drains 1.98 ha, 20% of the total runoff comes from rills. The rills' sediment erosion was measured and the total soil loss was then calculated for detachment rates between 1685 g m −2 and 3018 g m −2 . The interrill areas (99.75% of the test site) show values between 29 and 143 g m −2 . This suggests an important role of rill erosion concerning runoff and soil detachment.

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Rill erosion: Exploring the relationship between experiments, modelling and field observations

Cited by 241 publications

References 75 publications

The characteristics of rill development and their effects on runoff and sediment yield under different slope gradients

The characteristics of rill development and their effects on runoff and sediment yield under different slope gradients

Validation of Erosion Modeling: Physical and Numerical

Soil Erosion on Abandoned Land in Andalusia: A Comparison of Interrill- and Rill Erosion Rates

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