Parametric study on the effect of rainfall pattern to slope stability

Sagitaningrum, Fathiyah Hakim; Bahsan, Erly

doi:10.1051/matecconf/201710105005

Cited by 9 publications

(5 citation statements)

References 10 publications

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“…Hence, the development and the changes in the negative pore-water pressure were analysed using a method similar that has been used in the slope stability analysis by Perrone et al (2008). Moreover, several studies have stressed that pore-water pressures may also be affected by the different types of soils (; Rahimi et al, 2011 Sagitaningrum, andBahsan, 2017).…”

Section: Pore-water Pressurementioning

confidence: 99%

The Effect of Extreme Rainfall Events on Riverbank Slope Behaviour

Taib

Razali

et al. 2022

Front. Environ. Sci.

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Many slope failures take place during or after rainfall events. Landslides are one of the tragedies associated with slope failures and often lead to fatal accidents. A study on the effects of extreme rainfall on slope stability considering the historical rainfall data, slope characteristics and properties, and flow boundary conditions was undertaken. This study investigated the behaviour of the Sg Langat slope under the influence of extreme rainfall gathered from historical data. Sg Langat was selected as the research area because of its high riverbank failures. The focus of this study are as follows: 1) to determine the effect of slope angles on slope stability, 2) to assess the development of pore-water pressure based on the changing groundwater levels, and 3) to analyse the influence of extreme rainfall events on the slope behaviour via numerical modelling. This study enhances the understanding of certain slope conditions and contributes to the analysis of slope stability through numerical modelling, making it relatively convenient to observe the soil conditions for determining the slope stability of the research area in regards to the effect of extreme rainfall. The results were obtained with respect to the changes in the pore-water pressure and the factor of safety. It was observed that the pressure changes were different for every channel, demonstrating that the generation of negative pore-water pressure was not directly affected by the type of analysis and the rainfall infiltration alone. Moreover, the slopes on all channels presented were considered unstable because of the considerable changes in the negative pore-water pressure at a relatively shallow depth, causing soil strength reduction. The factor of safety recorded for Channel 1 was the lowest at 0.18, whereas Channel 3 had the highest factor of safety of 1.11 but was still considered unsafe as it fell below the standard safety margin of 1.3. Apart from the different rainfall intensities applied, the geometry of the slopes also affected the slope stability.

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Section: Pore-water Pressurementioning

confidence: 99%

The Effect of Extreme Rainfall Events on Riverbank Slope Behaviour

Taib

Razali

et al. 2022

Front. Environ. Sci.

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“…Rainfall-induced slope instability is usually related to slope type, gradient, soil properties, and rainfall intensity [15,16]. Controlling the gradients and types of slopes is one of the effective measures used to reduce rainfall damage [17,18], and the flatter the slope is, the higher the safety factor is during rainfall events [16]. For man-made dammed stockpiles, the flatter slope means less stockpile quantity within a certain range, and a reduction in slope gradient can harm the economic and social value of man-made stockpiles.…”

Section: 1 Introduction Of the Test Systemmentioning

confidence: 99%

Experimental Study on the Evolutionary Law of Transient Saturation Zones in a Red Mud Dam under Rainfall Conditions

Chang,

Dong,

Liu

et al. 2024

Sustainability

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Utilizing a laboratory model test, this study seeks to evaluate the distribution patterns of volumetric moisture content, soil pressure, and pore water pressure within the body of a red mud dam, given varying initial conditions of slope types and ratios, during continuous heavy rainfall. The objective is to investigate the failure mechanisms of a red mud dam under distinct operational conditions during rainfall, thereby offering insights for landslide prevention and ensuring dam construction quality. The results suggest that a stepped red mud dam acts as a buffer platform, altering the seepage direction within the dam and minimizing the water seepage path. When the slope ratio is 1:1, the transient saturated zone is located on the slope face of the dam’s body, near the top of the slope, with the saturation time at the first monitoring point occurring 300 s earlier than in a dam with a slope ratio of 1:2. Rainfall affects the distribution of internal forces in the red mud dam body. After rainfall, in the transient saturated zone of the stepped dam body, vertical soil pressure decreases 25% and horizontal soil pressure decreases 6.5%; in the transient saturated zone of the dam with a slope ratio of 1:1, vertical soil pressure decreases 14.8% and horizontal earth pressure decreases 29%; in the transient saturated zone of a dam with a slope ratio of 1:3, the change in soil pressure is small.

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“…Many studies have concluded that the higher the slope angle lower both the initial and minimum factors of safety [5,11,12]. In contrast, the reduction of the factor of safety in gentle slopes is higher than that of steeper slopes at heavy rainfall [13][14][15]. According to [5], under a short-term rainfall (i.e.…”

Section: Introductionmentioning

confidence: 99%

Factors Controlling Rainfall-Induced Slope Instability of Natural Slopes in North Maleny, Queensland

Abeykoon¹

2022

GEOMATE

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Rainfall infiltration is a significant triggering factor of slope failures as major landslide events have occurred during or immediately after rainfall. The rainfall-induced slope instability is governed by a complex interaction of topographical, hydrological and geological conditions of the slopes; hence these properties are critical parameters in determining slope stability under rainfall. The slopes in reservoirs catchments areas are constantly subjected to heavy rainfall with high intensity; thus, investigating the effect of rainfall on slope failures is vital to mitigate the adverse consequences. In this study, two critical slopes were identified based on high rates of erosion, sediment run-off, and elevated risk in Eden Road and Newsham in Lake Baroon Catchment, North Maleny, Queensland, Australia. The effect of slope geometry was analyzed by parametric analysis with the parameters; of soil's initial moisture content, rainfall intensity, and intermittent rainfall on landslide initiation in these two critical slopes by employing seepage and slope stability. The stability of the slopes was evaluated by the factor of safety, based on the produced seepage conditions from seepage analyses. The outcomes of the parametric studies are involved in identifying critical slope regions and rainfall conditions to mitigate the potential risk of rainfall-induced slope failures on Baroon Pocket Dam, Queensland.

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Parametric study on the effect of rainfall pattern to slope stability

Cited by 9 publications

References 10 publications

The Effect of Extreme Rainfall Events on Riverbank Slope Behaviour

The Effect of Extreme Rainfall Events on Riverbank Slope Behaviour

Experimental Study on the Evolutionary Law of Transient Saturation Zones in a Red Mud Dam under Rainfall Conditions

Factors Controlling Rainfall-Induced Slope Instability of Natural Slopes in North Maleny, Queensland

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