Effects of rainfall intensity and slope gradient on runoff and sediment yield from hillslopes with weathered granite

Deng, Longzhou; Zhang, Liping; Fan, Xiangtao; Sun, Tong; Ni, Liang

doi:10.1007/s11356-019-06486-z

Cited by 13 publications

(8 citation statements)

References 59 publications

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“…From the fourth to sixth rainfall events, the influence of the slope gradient on soil erosion gradually weakened. Thus, the combined effects of slope gradient and rainfall characteristics (amount, duration, and intensity) on runoff and sediment yields warrant further exploration and ongoing data collection (Deng et al, 2019).…”

Section: Runoff and Sediment Response To Vegetation Type And Slope Gradientmentioning

confidence: 99%

“…By comparing the soil erodibility and critical shear stress, Xing et al (2018) studied the differences of rill erosion behaviors between loess and purple soils. Deng et al (2019) compared the characteristics of runoff and sediment yield under different slope gradients and rainfall intensities for two kinds of different hillslopes with weathered granite and with exposed soils respectively based on the method of indoor artificial rainfall simulations.…”

Section: Introductionmentioning

confidence: 99%

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Effects of vegetation cover and slope on soil erosion in the Eastern Chinese Loess Plateau under different rainfall regimes

Sun

Hou

Chen

2021

PeerJ

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Soil erosion is a critical environmental problem of the Chinese Loess Plateau (CLP). The effects of vegetation cover on soil erosion reduction under different rainfall types are not well understood especially in the eastern Chinese Loess Plateau (ECLP). In this study, we monitored runoff and sediment yield at the Fengjiagou water and soil conservation station with five types of vegetation cover (arbor trees (ARC), shrubs (SHC), arable (ABC), natural vegetation (NVC), and artificial grass (APC)) and three slope gradients (10°, 15°, and 20°) in the ECLP. Based on long-term monitoring data, five rainfall types were classified by the maximum 30 min rainfall intensity (I30). We also quantitatively revealed the interactive effects of different types precipitation, vegetation cover and slope gradients on regional soil erosion. The results showed that (1) The RII (13 times) and RIII (eight times) type are the most threatening erosive rainfall in this region. (2) The ARC and SHC type were most beneficial for soil and water conservation in the ECLP; The APC and ABC are not conductive to the prevention of regional soil erosion. (3) Runoff and sediment yields increased with the slope gradient. The farmland is vulnerable to soil erosion when the slope gradient exceeds 10°. The results of this study can improve the understanding of regional soil erosion processes on the ECLP and provide useful information for managing regional water and land resources.

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Section: Runoff and Sediment Response To Vegetation Type And Slope Gradientmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of vegetation cover and slope on soil erosion in the Eastern Chinese Loess Plateau under different rainfall regimes

Sun

Hou

Chen

2021

PeerJ

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“…Furthermore, sedimentary material is carried at greater fall intensity than infiltration, which causes failure to seep into the soil. The tendency of variations in land erosion rate is largely determined by use, and vegetation cover [43][44][45].…”

Section: Discussionmentioning

confidence: 99%

Assessment of Land and Water Conservation Practices Against Runoff and Erosion

Naharuddin¹,

Wahid²,

Rachman³

et al. 2022

Pol. J. Environ. Stud.

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The Land converted in the form of road construction crossing protected forest areas has resulted in the loss of vegetation diversity and while surface flow and erosion are accelerated. This research aimed at determining the effectiveness of land and water conservation practices in controlling runoff and erosion. The research method adopted in this investigation uses a multislot divider measuring 10 m x 5 m with a slope of 25% on geogrid, geonet, and vegetation cover plots, where each plot comprises 3 pieces, accumulating to 9 units. The result showed the highest total runoff between June and November in the geogrid plot (531.61 m 3 /ha). This was followed by the geonet (492.5 m 3 /ha), while the lowest value was recorded in the vegetation cover plot (174.7 m 3 /ha), with 1336 mm of rainfall. These outcomes collectively had a directly proportional relationship with the total land erosion, and similar rainfall at 94.17 tons/ha, 73.9 tons/ha, and 42.4 tons/ha for geogrid, geonet, and vegetation cover plots, respectively. The results demonstrated the effect of rainfall and slope on runoff as well as erosion and also provide valuable information on the negative impact of land conversion from vegetation cover to other uses.

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“…Many scholars have carried out research on the characteristics, mechanisms, and control methods of soil erosion on weathered granite [35,36]. Deng et al [37] investigated the effects of rainfall intensity and slope gradient on runoff and sediment yield from hillslopes with weathered granite. Liu et al [38] studied the processes and mechanisms of collapsing erosion for granite residual soil in southern China.…”

Section: Introductionmentioning

confidence: 99%

Erosion of Granite Red Soil Slope and Processes of Subsurface Flow Generation, Prediction, and Simulation

Tian

et al. 2023

IJERPH

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A deeper understanding of the rainfall–flow processes can improve the knowledge of the rain-driven erosional processes in coarse-textured agricultural soil. In this study, on the red soil slope farmland developed from weathered granite, a simulated rainfall experiment was conducted to study the characteristics of rainfall redistribution, the processes of surface–subsurface flow generation and prediction, and sediment production. Rainfalls with three intensities of 45, 90, and 135 mm h−1 with a duration of 90 min were applied to the weathered granite red soil with the slope gradient of 10°. Under 45 mm h−1 rainfall intensity, the output of rainwater was composed by subsurface flow and bottom penetration, accounting for 35.80% and 39.01% of total rainfall, respectively. When the rainfall intensities increased to 90 and 135 mm h−1, the surface flow became the main output of rainwater, accounting for 83.94% and 92.42%, respectively. Coarsened soil exhibited strong infiltration-promoting but poor water-storage capacities under light rainfalls. With an increased rainfall intensity, the surface flow coefficient increased from 19.87% to 92.42%, while the amount of subsurface flow and bottom penetration decreased by 1.3 and 6.2 L, respectively. For sediment production, the sediment concentration was raised from 1.39 to 7.70 g L−1, and D10, D50, and D90 increased by 1.50, 1.83, and 1.40 times, respectively. The content of coarse particles (>1 mm) in surface soil increased by 12%, while the content of fine particles (<0.5 mm) decreased by 9.6%. Under strong rainfalls, severe soil and water loss, coarsening soil surface, and large loss of fine particles became major problems. During rainfall, the subsurface flow and bottom penetration could be predicted well through quadratic equations of rainfall time, which transformed into time-dependent exponential functions after rainfall. The results provide a theoretical basis and data reference for soil erosion prevention and water management in coarse-textured agricultural lands.

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Effects of rainfall intensity and slope gradient on runoff and sediment yield from hillslopes with weathered granite

Cited by 13 publications

References 59 publications

Effects of vegetation cover and slope on soil erosion in the Eastern Chinese Loess Plateau under different rainfall regimes

Effects of vegetation cover and slope on soil erosion in the Eastern Chinese Loess Plateau under different rainfall regimes

Assessment of Land and Water Conservation Practices Against Runoff and Erosion

Erosion of Granite Red Soil Slope and Processes of Subsurface Flow Generation, Prediction, and Simulation

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