Erosional development of small scale drainage networks

Helming, Katharina; Römkens, M. J. M.; Prasad, S. N.; Sommer, Harald

doi:10.1007/bfb0009723

Cited by 10 publications

(9 citation statements)

References 32 publications

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“…This corresponds to the description by Favis-Mortlock et al (2000) that some rills were more 'successful' than others. This kind of discontinuity usually characterized earlier phases of rill network development (Schramm and Prinz, 1993;Helming et al, 1999), although it was also observed at the end of rainfall simulation by Bryan and Poesen (1989).…”

Section: Discussionmentioning

confidence: 87%

“…Whilst laboratory studies are conducted mostly on one rill, under field conditions rills usually create a network, which may act differently. The functioning of rill networks is reflected in the work of Favis-Mortlock et al (2000) and Helming et al (1999). Only a few experimental studies with a rainfall simulator have presented the evolution of rill systems under field conditions (Schramm and Prinz, 1993).…”

Section: Introductionmentioning

confidence: 99%

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Rill characteristics and sediment transport as a function of slope length during a storm event on loess soil

Rejman

Brodowski

2005

Earth Surf Processes Landf

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On the basis of detailed rill surveys carried out on bare plots of different lengths at slopes of 12 per cent, basic rill parameters were derived. Rill width and maximum depth increased with plot length, whereas rill amount and cross-sectional area, expressed per unit length, remained similar. On smaller plots, all rills were connected in a continuous transport system reaching the plot outlet, whilst on larger plots (10 and 20 m long) part of the rills ended with a deposition areas inside the plots. Amounts of erosion, calculated from rill volume and soil bulk density, were compared with soil loss measured at the plot outlets. On plots 10 and 20 m long, erosion estimated from volume of all rills was larger than measured soil loss. The latter was larger than erosion estimated from volume of contributing rills. To identify contributing soil loss area on these plots, two methods were applied: (i) ratio of total soil loss to maximum soil loss per unit area, and (

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Section: Discussionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Rill characteristics and sediment transport as a function of slope length during a storm event on loess soil

Rejman

Brodowski

2005

Earth Surf Processes Landf

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“…Experimental rill erosion research, from both laboratory and field studies (Bryan and Poesen, 1989;Gilley et al, 1990;Huang et al, 1996;Helming et al, 1999;Brunton and Bryan, 2000;De Santisteban et al, 2005;Mancilla et al, 2005;Rejman and Brodowski, 2005), aimed to observe rill network formation (Mancilla et al, 2005), to define the critical conditions for rill initiation (Torri et al, 1987;Govers and Poesen, 1988;Slattery and Bryan, 1992;Yao et al, 2008), to study the development of rill head cut morphology (Brunton and Bryan, 2000), to estimate the main hydraulic variables (cross-section area, wetted perimeter, hydraulic radius, mean velocity, and shear stress) (Foster et al, 1984;Gilley et al, 1990;Govers, 1992;Gimenéz et al, 2004;Bruno et al, 2008) and to propose mathematical models for estimating soil loss due to rill erosion (Foster, 1982;Nearing et al, 1997;Govers et al, 2007;Bruno et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Similarity between morphological characteristics of rills and ephemeral gullies in Sicily, Italy

Capra

Stefano

Ferro

et al. 2009

Hydrological Processes

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Abstract:This paper reports the results of a field investigation aimed to establish morphological similarity between rills and ephemeral gullies. Rill measurements were made on 14 plots having a surface area of 22-352 m 2 located on a 14Ð9% slope and on a plot 6Ð0 m wide and 22Ð0 m long having a uniform 22Ð0% slope. The plots are located on the experimental station for soil erosion measurements, 'Sparacia', of the Agricultural Faculty of Palermo University, in Sicily, Italy. All plots are subjected to natural rainfall. The measurements were made immediately following five events between November 2004 and December 2005. The ephemeral gully measurements were made on a cultivated area of about 120 ha, located in Central Sicily, which is representative of many soil-crop conditions in the Mediterranean basin. The morphological similarity between rill and ephemeral gully was first tested. Then a power relationship between rill or gully volume and length, theoretically deduced by dimensional analysis and self-similarity theory, was applied. This power relationship needs a different scale factor for rill and gully measurements. Finally, using two dimensionless groups representative of the channel morphology variables, the analysis showed that a single relationship can be applied to rill and gully measurements.

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“…Most available experimental rill research, carried out both in laboratory (Bryan and Poesen, 1989;Brunton and Bryan, 2000;Gilley et al, 1990;Huang et al, 1996;Mancilla et al, 2005) and field conditions (De Santisteban et al, 2005, Helming et al, 1999Rejman and Brodowski, 2005), was carried out using soil with different texture and natural and simulated rainfalls. The aim of this available research was to observe rill network formation (Mancilla et al, 2005), to define the initial condition for rilling (Bryan et al, 1998;Govers and Poesen, 1988;Slattery and Bryan, 1992;Torri et al, 1987), to study the development of rill head morphology (Brunton and Bryan, 2000), to estimate the main hydraulic variables (cross-section area, wetted perimeter, hydraulic radius, mean velocity, shear stress) (Foster et al, 1984;Gilley et al, 1990;Gimenéz et al, 2004;Govers, 1992) and to propose mathematical models for estimating soil loss due to rill erosion (Foster, 1982;Nearing et al, 1989).…”

Section: Introductionmentioning

confidence: 99%

Field investigation on rilling in the experimental Sparacia area, South Italy

Bruno

Stefano

Ferro

2007

Earth Surf Processes Landf

113

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In this paper the results of a field investigation on rilling carried out in the experimental Sparacia area are reported.The measurements were made on a plot 6 m wide and 22 m long subjected to natural rainfalls. For ten rainfalls the total soil loss (interrill and rill erosion) was collected in a storage system consisting of two tanks arranged in series at the base of the plot. Rill morphology (rill length and cross-sections) was measured for five rainfall events, while the rill profile was surveyed for three events.First the contribution of each component (rill and interrill erosion) to total soil loss was established. Then the analysis allowed establishment of a power relationship between the rill length and the rill volume. Finally, for three events detailed information on rill erosion and rill morphology allowed verification of the applicability of WEPP and estimation of the rill erodibility constant. Figure 12. Comparison between Equation (2) and the pairs (L, V ) available for five erosive events.Figure 13. Rill cross-sections.Figure 15. Comparison between Equation (1) and the pairs (τ − τ c , D r ).

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Erosional development of small scale drainage networks

Cited by 10 publications

References 32 publications

Rill characteristics and sediment transport as a function of slope length during a storm event on loess soil

Rill characteristics and sediment transport as a function of slope length during a storm event on loess soil

Similarity between morphological characteristics of rills and ephemeral gullies in Sicily, Italy

Field investigation on rilling in the experimental Sparacia area, South Italy

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