The role of seepage in erodibility

Owoputi, Lawrence; Stolte, W. J.

doi:10.1002/hyp.153

Cited by 35 publications

(12 citation statements)

References 9 publications

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“…This increased pore water pressure was recognized as the most important factor for mass failure. Flume studies pointed out that erosion rates of the bank surface increase in magnitude when the unsaturated pore water pressure is near to saturation and soil strength is decreased (Owoputi and Stolte, 2001;Rockwell, 2002;Fox et al, 2006).…”

Section: Introductionmentioning

confidence: 98%

Modeling seepage erosion and bank retreat in a composite river bank

Karmaker

Dutta

2013

Journal of Hydrology

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Section: Introductionmentioning

confidence: 98%

Modeling seepage erosion and bank retreat in a composite river bank

Karmaker

Dutta

2013

Journal of Hydrology

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“…On the other hand, the near-surface hydraulic gradient, that is, drainage and seepage, has been shown to significantly affect erosion (Bryan and Rockwell, 1998;Huang and Laflen, 1996;Huang, 1998b;Owoputi and Stolte, 2001). Darboux and Huang (2005) conducted a laboratory experiment to assess effects of soil surface depressions on runoff initiation, water runoff, and soil loss under different subsurface moisture regimes (seepage and drainage) and upstream flow conditions (with or without runoff).…”

Section: Introductionmentioning

confidence: 99%

Assessing soil surface roughness decay during simulated rainfall by multifractal analysis

Vázquez

Moreno

Miranda

et al. 2008

Nonlin. Processes Geophys.

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Understanding and describing the spatial characteristics of soil surface microrelief are required for modelling overland flow and erosion. We employed the multifractal approach to characterize topographical point elevation data sets acquired by high resolution laser scanning for assessing the effect of simulated rainfall on microrelief decay. Three soil surfaces with different initial states or composition and rather smooth were prepared on microplots and subjected to successive events of simulated rainfall. Soil roughness was measured on a 2×2 mm 2 grid, initially, i.e. before rain, and after each simulated storm, yielding a total of thirteen data sets for three rainfall sequences. The vertical microrelief component as described by the statistical index random roughness (RR) exhibited minor changes under rainfall in two out of three study cases, which was due to the imposed wet initial state constraining aggregate breakdown. The effect of cumulative rainfall on microrelief decay was also assessed by multifractal analysis performed with the box-count algorithm. Generalized dimension, D q , spectra allowed characterization of the spatial variation of soil surface microrelief measured at the microplot scale. These D q spectra were also sensitive to temporal changes in soil surface microrelief, so that in all the three study rain sequences, the initial soil surface and the surfaces disturbed by successive storms displayed great differences in their degree of multifractality. Therefore, Multifractal parameters best discriminate between successive soil stages under a given rain sequence. Decline of RR and multifractal parameters showed little or no association.Correspondence to: E. Vidal Vázquez (evidal@udc.es)

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“…The process of seepage erosion has also been studied as an example of drainage network development [ Gomez and Mullen , 1992]. Our experiments, following those of Howard and McLane [1988], Owoputi and Stolte [2001], and others are designed to enable us to construct a predictive, quantitative theory. Consequently, they stress simplicity and completeness of information.…”

Section: Introductionmentioning

confidence: 99%

Threshold phenomena in erosion driven by subsurface flow

et al. 2004

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[1] We study channelization and slope destabilization driven by subsurface (groundwater) flow in a laboratory experiment. The pressure of the water entering the sand pile from below as well as the slope of the sand pile are varied. We present quantitative understanding of the three modes of sediment mobilization in this experiment: surface erosion, fluidization, and slumping. The onset of erosion is controlled not only by shear stresses caused by surfical flows but also by hydrodynamic stresses deriving from subsurface flows. These additional forces require modification of the critical Shields criterion. Whereas surface flows alone can mobilize surface grains only when the water flux exceeds a threshold, subsurface flows cause this threshold to vanish at slopes steeper than a critical angle substantially smaller than the maximum angle of stability. Slopes above this critical angle are unstable to channelization by any amount of fluid reaching the surface.

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The role of seepage in erodibility

Cited by 35 publications

References 9 publications

Modeling seepage erosion and bank retreat in a composite river bank

Modeling seepage erosion and bank retreat in a composite river bank

Assessing soil surface roughness decay during simulated rainfall by multifractal analysis

Threshold phenomena in erosion driven by subsurface flow

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