Effect of raindrop impact and its relationship with aggregate stability to different disaggregation forces

Ramos, M. C.; Nacci, S.; Pla, I.

doi:10.1016/s0341-8162(03)00086-9

Cited by 92 publications

(53 citation statements)

References 13 publications

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“…Aggregate breakdown produces smaller particles than the original soil, which may then be displaced and reoriented into a more continuous structure. They clog conducting pores and, consequently, a surface seal is developed (Ramos et al, 2003). The particle size distribution of the eroded soil can be influenced by the particle size distribution of the original soil, the aggregate breakdown during erosion event and the settling velocity of different size classes of particles (Rose et al, 2007;Mahmoodabadi et al, 2014a).…”

Section: Introductionmentioning

confidence: 99%

“…Romkens et al (1985) reported that raindrops can destroy or deform the arrangement of soil particles; therefore, the detached particles can clog the soil pores, again reducing the IR. Ribolzi et al (2011) concluded that the kinetic energy of raindrops and associated risks of soil crusting also decrease on steeper slopes, which might lead to increasing IR. The soils of arid and semiarid regions due to low content of organic carbon are generally susceptible to surface sealing and erosion (Cerdà, 2000;Mahmoodabadi and Cerdà, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Aggregate breakdown and surface seal development influenced by rain intensity, slope gradient and soil particle size

Sajjadi

Mahmoodabadi

2015

Solid Earth

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Abstract. Aggregate breakdown is an important process which controls infiltration rate (IR) and the availability of fine materials necessary for structural sealing under rainfall. The purpose of this study was to investigate the effects of different slope gradients, rain intensities and particle size distributions on aggregate breakdown and IR to describe the formation of surface seal. To address this issue, 60 experiments were carried out in a 35 × 30 × 10 cm detachment tray using a rainfall simulator. By sieving a sandy loam soil, two sub-samples with different maximum aggregate sizes of 2 mm (D max 2 mm) and 4.75 mm (D max 4.75 mm) were prepared. The soils were exposed to two different rain intensities (57 and 80 mm h −1 ) on several slopes (0.5, 2.5, 5, 10 and 20 %) each at three replicates. The result showed that for all slope gradients and rain intensities, the most fraction percentages in soils D max 2 and D max 4.75 mm were in the finest size classes of 0.02 and 0.043 mm, respectively. The soil containing finer aggregates exhibited higher transportability of pre-detached material than the soil containing larger aggregates. Also, IR increased with increasing slope gradient, rain intensity and aggregate size under unsteady state conditions because of less development of surface seal. However, under steady state conditions, no significant relationship was found between slope and IR. The findings of this study revealed the importance of rain intensity, slope steepness and soil aggregate size on aggregate breakdown and seal formation, which can control infiltration rate and the consequent runoff and erosion rates.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Aggregate breakdown and surface seal development influenced by rain intensity, slope gradient and soil particle size

Sajjadi

Mahmoodabadi

2015

Solid Earth

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“…Raindrop impact on burnt soils can lead to the structural degradation of the soil surface (Bresson and Boiffin, 1990;Poesen and Nearing, 1993;Ramos et al, 2003). Aggregate breakdown liberates small soil particles forming a surface crust with low permeability to air and water (Llovet et al, 2008;Mataix Solera et al, 2011, León et al, 2013.…”

Section: Introductionmentioning

confidence: 99%

Comparison of different methods to measure soil erosion in the Central Ebro Valley

León

Badía

Echeverría

2015

CIG

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“…Aggregate breakdown and transfer of soil fragments by raindrop impact are the first key steps of the soil erosion process (Legout et al, 2005b;Shainberg et al, 1992). These initial steps may affect soil porosity, resulting in decreased infiltration and hydraulic conductivity and increased surface sealing and susceptibility to erosion (Falsone et al, 2012;Huang et al, 2010;Jasinska et al, 2006;Li et al, 2008;Raine and So, 1993;Ramos et al, 2003;Salles et al, 2000). In addition, soil aggregates physically protect organic matter (Feller and Beare, 1997;Gregorich et al, 1994;Li and Pang, 2014), which is important for carbon sequestration (Chaplot and Cooper, 2015).…”

mentioning

confidence: 99%

Impact of Raindrop Characteristics on the Selective Detachment and Transport of Aggregate Fragments in the Loess Plateau of China

Fu¹,

Zheng³

et al. 2016

Soil Science Soc of Amer J

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The size of the raindrop in a rainfall event was the direct driving force for the aggregate breakdown and dispersion: the greater the diameter of raindrops, the higher was the degree of aggregate breakdown and dispersion. The splash erosion for the aggregate fragment <0.053 mm was at a maximum with increases in raindrop diameter, which accounted for 33.46 to 72.02% of the total splash amount. The contents of microaggregate fragments of <0.25 mm were highest at each splash distance and accounted for 50.49 to 94.04% of the total splash amount. This showed that microaggregate dispersion and breakdown is important in soil surface sealing and pore clogging.

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Effect of raindrop impact and its relationship with aggregate stability to different disaggregation forces

Cited by 92 publications

References 13 publications

Aggregate breakdown and surface seal development influenced by rain intensity, slope gradient and soil particle size

Aggregate breakdown and surface seal development influenced by rain intensity, slope gradient and soil particle size

Comparison of different methods to measure soil erosion in the Central Ebro Valley

Impact of Raindrop Characteristics on the Selective Detachment and Transport of Aggregate Fragments in the Loess Plateau of China

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