Soil erosion under different rainfall intensities, surface roughness, and soil water regimes

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

doi:10.1016/s0341-8162(01)00161-8

Cited by 389 publications

(232 citation statements)

References 14 publications

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“…Rainfall erosivity causes gully erosion in that the duration, intensity and frequency of rainfall induces the occurrence of gully development (Romkens et al, 2002). It affects all processes of erosion be it splash, sheet, rill and gully erosion.…”

Section: Statement Of the Problemmentioning

confidence: 99%

“…The factors that influence gully erosion could be natural or anthropogenic. Rainfall is one of the most significant factors affecting gully erosion; duration, intensity and frequency of rainfall cause gully erosion (Romkens, Helming and Prasad, 2002). Pathak, Wani and Sudi (2005) asserted that rainfall is an important factor of gully erosion; intense rains coupled with soils prone to sealing and crusting generate high runoff volume and concentrated flow.…”

Section: Introductionmentioning

confidence: 99%

“…Rainfall erosivity is defined as the aggressiveness of rain to induce erosion to soil (Lal's, 2001). It is a major contributor to gully erosion (Romkens, Helming and Prasad, 2002). The higher the amount of rainfall, the higher the quantity of soil particles that are dissolved, displaced and moved away which causes gully erosion (Chimelu, Okeke, Nwosu, Ibe, Ndukwu and Ugwuobi, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…The higher the amount of rainfall, the higher the quantity of soil particles that are dissolved, displaced and moved away which causes gully erosion (Chimelu, Okeke, Nwosu, Ibe, Ndukwu and Ugwuobi, 2013). From Lal's (2001), Romkens et al's (2002) and Chimelu et al's (2013) definitions of rainfall erosivity, it can be distilled that the power of rainfall to cause erosion is known as erosivity and it is this that really influences the removal of soil particles in the rainsplash-sheet-rillgully erosion processes with its accompanying adverse impacts. Therefore, the issue of gully erosion deserves priority attention to mitigate its dire consequences on the land status and environmental quality.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Review of Rainfall Erosivity as a Natural Factor of Gully Erosion

Igwe¹,

Eze²,

Ikeji³

et al. 2017

IJEAB

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Section: Statement Of the Problemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Review of Rainfall Erosivity as a Natural Factor of Gully Erosion

Igwe¹,

Eze²,

Ikeji³

et al. 2017

IJEAB

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“…A erosão hídrica é um dos principais processos associados à degradação ambiental, podendo ser definida como um processo de desagregação e transporte das partículas do solo causado por agentes erosivos (Griebeler et al, 2001;Römkens et al, 2001). Dessa forma, a erosão reduz a capacidade produtiva das culturas, além de causar sérios danos ambientais, como: assoreamento e poluição das fontes de água (Zartl et al, 2001;Cogo et al, 2003).…”

Section: Introductionunclassified

Características hidráulicas da erosão em sulcos em um cambissolo do semiárido do Brasil

Bezerra¹,

Cantalice

Filho

et al. 2010

Rev. Bras. Ciênc. Solo

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RESUMOA erosão em sulcos é formada a partir da concentração do escoamento superficial nas depressões da superfície do terreno, evoluindo para a formação de canais ou ravinas, o que faz aumentar a degradação dos solos pela erosão hídrica. Os objetivos deste trabalho foram avaliar as condições hidráulicas do escoamento em sulcos pré-formados, caracterizando o regime de escoamento, e avaliar mudanças induzidas na geometria desses sulcos. Para isso, um experimento foi realizado num Cambissolo Háplico do sertão pernambucano, município de Serra Talhada, Brasil. Os tratamentos consistiram na aplicação de vazões de 17,5; 47,0; 60,0; 77,0; e 110,0 L min -1 , com duração de 20 min, em sulcos pré-formados em um solo recém-preparado. O aprofundamento dos sulcos foi dominante no início dos testes. A partir do momento em que o sulco atingiu o solo não revolvido, o processo erosivo, ou seja, a ação da tensão cisalhante, caracterizou-se principalmente pelo alargamento do canal, desgastando com maior proporção a base das paredes laterais dos sulcos. A ação da concentração do escoamento superficial nos sulcos experimentais produziu regimes de escoamento na faixa de transição supercrítico, atestando a ocorrência da erosão em sulcos. O cisalhamento na base do sulco, provocado pelo escoamento, facilitou o desmoronamento nas paredes laterais.

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Mapping Quaternary alluvial fans in the southwestern United States based on multiparameter surface roughness of lidar topographic data

2014

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[1] Quaternary alluvial fans have diverse surface morphologies related to both depositional and weathering processes. Numerous studies have demonstrated that the surface expression and morphometry of alluvial fans can be used as an indicator of their relative age of deposition, but only recently has there been an effort to utilize high-resolution topographic data to differentiate alluvial fans by surface age with automated and quantifiable routines. We developed a quantitative model for mapping the relative age of alluvial fan surfaces based on multiparameter surface roughness values computed from 1 m resolution lidar topographic data. Roughness is defined as a function of observational scale and integration of slope, curvature, and aspect topographic parameters. Alluvial fan roughness values were computed across multiple observation scales (3 × 3 m to 150 × 150 m) based on the standard deviation (SD) of slope, curvature (tangential), and aspect topographic parameters. Plots of roughness value versus size of observation scale suggest that the SD of each parameter over a 7 × 7 m observation window best identified the signature of surface roughness elements. Roughness maps derived from slope, curvature, and aspect at this scale were integrated using fuzzy logic. The integrated roughness map was then classified into five relative morphostratigraphic surface age categories (active wash to~400 ka) and statistically compared with a similar fivefold surface age map of alluvial fans developed using traditional field surveys and aerial photographic interpretation. The model correctly predicted the distribution and relative surface age of~61% of alluvial fan landforms based on traditional mapping techniques.

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Soil erosion under different rainfall intensities, surface roughness, and soil water regimes

Cited by 389 publications

References 14 publications

A Review of Rainfall Erosivity as a Natural Factor of Gully Erosion

A Review of Rainfall Erosivity as a Natural Factor of Gully Erosion

Características hidráulicas da erosão em sulcos em um cambissolo do semiárido do Brasil

Mapping Quaternary alluvial fans in the southwestern United States based on multiparameter surface roughness of lidar topographic data

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