Rainwater infiltration into a bare loamy sand

Sharma, Kapil; Singh, H. P.; Pareek, O. P.

doi:10.1080/02626668309491980

Cited by 50 publications

(25 citation statements)

References 4 publications

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“…Bryan and Poesen (1989) and Slattery and Bryan (1992) also found that rilling increased infiltration. De Ploey et al (1976), Sharma et al (1983) and Djorovic (1980) observed an increase in runoff with increasing slope angle and this was attributed to a decrease in depressional storage and ponding depth. Govers (1990) showed that slope had a significant negative effect due to differential soil cracking.…”

Section: Introductionmentioning

confidence: 95%

Field measurements of interrill erosion under �different slopes and plot sizes

Chaplot¹,

Bissonnais

2000

Earth Surf. Process. Landforms

146

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Despite numerous studies, the effect of slope on interrill erosion is not clearly established. Several interactions exist between erosion parameters that are not taken into account under experimental laboratory measurements and results need to be validated in the field. The influence of slope steepness (2 to 8 per cent) on soil loss for a crusted interrill area and the detachment and transport processes involved in the interaction between slope, rain characteristics and plot size were investigated. Sediment discharge and runoff rates were measured in bounded plots (1 m 2 and 10 m 2 ) under natural and simulated rainfall, allowing the analysis of a combination of detachment and transport processes at various scales in the field. Runoff rate increased from 20 to 90 per cent with increasing slope and rain intensity for both plot sizes, whereas sediment concentration increased from 2 to 6 g l À1 with increasing slope only for the 10 m 2 plots. At the 1 m 2 scale, erosion was transport-limited due to the reduced rain-impacted flow. Interactions between slope angle and rain intensity were observed for detachment and transport processes in interrill erosion. Results show the importance of an adapted experimental set-up to get reference data for interrill erosion model development and validation.

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Section: Introductionmentioning

confidence: 95%

Field measurements of interrill erosion under �different slopes and plot sizes

Chaplot¹,

Bissonnais

2000

Earth Surf. Process. Landforms

146

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“…As slope gradient increases, some studies observed a decrease resulting from a thinning and/or disruption of the crust (Poesen 1984), rills' formation Slattery and Bryan 1992), differential soil cracking (Govers 1990), and greater ponding depth (Fox and others 1997), a Correlation is significant at the 0.01 level (2-tailed); R c and R h are runoff coefficient and rainfall amount, and I m , I 10 and I 30 are mean rainfall intensity, maximum 10-minute rainfall intensity, and maximum 30-minute rainfall intensity, respectively etc. However, De Ploey and others (1976), Sharma andothers (1983), andDjorovic (1980) observed an increase in runoff which was attributed to a decrease in depressional storage and ponding depth. Lal (1976) and Mah and others (1992) did not find any significant effect of slope angle on runoff.…”

Section: Effect Of Slope Gradientmentioning

confidence: 99%

Effect of Rainfall Regime and Slope on Runoff in a Gullied Loess Region on the Loess Plateau in China

Fang

Qiangguo

Chen

et al. 2008

Environmental Management

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Runoff was measured from seven plots with different slopes nested in Tuanshangou catchment on the Loess Plateau to study effect of slopes on runoff in relation to rainfall regimes. Based on nine years of field observation and K-mean clusters, 84 rainfall events were grouped into three rainfall regimes. Rainfall regime A is the group of events with strong rainfall intensity, high frequency, and short duration. Rainfall regime C consists of events with low intensity, long duration, and infrequent occurrence. Rainfall regime B is the aggregation of events of medium intensity and medium duration, and less frequent occurrence. The following results were found: (1) Different from traditional studies, runoff coefficient neither decreased nor increased, but presented peak value on the slope surfaces; (2) For individual plot, runoff coefficients induced by rainfall regime A were the highest, and those induced by rainfall regime C were the lowest; Downslope, the runoff coefficients induced by three rainfall regimes presented the same changing trend, although the peak value induced by regime A occurred on a shorter slope length compared to those by regime B and C; (3) Scale effect on runoff induced by rainfall regime A was the least, and that induced by rainfall regime C was the largest. These results can be explained by the interactions of crusting, soil moisture content, slope length and gradient, and erosion units, etc., in the context of different rainfall regimes.

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“…On the other hand, under conditions of low (0.6 mm·min -1 ) and high (2.12 and 2.54 mm·min -1 ) rainfall intensities, surface runoff increased with slope gradient increased (Figure 4a). One explanation for this was that infiltration rate decreased with increasing slope gradient (Sharma et al, 1983).…”

Section: Rainfall Intensity and Slope Gradient Effects On Runoffmentioning

confidence: 99%

Hydraulic characteristics and sediment generation on slope erosion in the Three Gorges Reservoir Area, China

Feng

Cheng

Ding

et al. 2016

Journal of Hydrology and Hydromechanics

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Hydrological processes play important roles in soil erosion processes of the hillslopes. This study was conducted to investigate the hydrological processes and the associated erosional responses on the purple soil slope. Based on a comprehensive survey of the Wangjiaqiao watershed in the Three Gorges Reservoir, four typical slope gradients (5°, 10°, 15°and 20°) were applied to five rainfall intensities (0.6, 1.1, 1.61, 2.12 and 2.54 mm·min -1 ). The results showed that both surface and subsurface runoff varied greatly depending on the rainfall intensity and slope gradient. Surface runoff volume was 48.1 to 280.1 times of that for subsurface runoff. The critical slope gradient was about 10°. The sediment yield rate increased with increases in both rainfall intensity and slope gradient, while the effect of rainfall intensity on the sediment yield rate was greater than slope gradient. There was a good linear relationship between sediment yield rate and Reynolds numbers, flow velocity and stream power, while Froude numbers, Darcy-Weisbach and Manning friction coefficients were not good hydraulic indicators of the sediment yield rate of purple soil erosion. Among the three good indicators (Re, v and w), stream power was the best predictor of sediment yield rate (R 2 = 0.884). Finally, based on the power regression relationship between sediment yield rate, runoff rate, slope gradient and rainfall intensity, an erosion model was proposed to predict the purple soil erosion (R 2 = 0.897). The results can help us to understand the relationship between flow hydraulics and sediment generation of slope erosion and offer useful data for the building of erosion model in purple soil.

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Rainwater infiltration into a bare loamy sand

Cited by 50 publications

References 4 publications

Field measurements of interrill erosion under �different slopes and plot sizes

Field measurements of interrill erosion under �different slopes and plot sizes

Effect of Rainfall Regime and Slope on Runoff in a Gullied Loess Region on the Loess Plateau in China

Hydraulic characteristics and sediment generation on slope erosion in the Three Gorges Reservoir Area, China

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