Conceptualization of preferential flow for hillslope stability assessment

Kukemilks, Karlis; Wagner, Jean-Frank; Saks, Tomas; Brunner, Philip

doi:10.1007/s10040-017-1667-0

Cited by 16 publications

(16 citation statements)

References 32 publications

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“…Several sections of the castle mound were selected for a slope stability analysis. A preliminary study with synthetic models was conducted to identify the most relevant factors affecting hillslope stability in the study site (Kukemilks et al 2018). The synthetic hydrogeological model represents the typical lithological sequence with alternating conductive sandstone and less conductive clay layers at different slope angles.…”

Section: Slope Stability Modelingmentioning

confidence: 99%

“…When linking preferential flow with landslide activity, many studies focus on shallow landslides in the regolith cover of slopes (Sorbino and Nicotera 2013;Formetta et al 2014;Kim et al 2014). However, it has been shown that bedrock fractures can reduce hillslope stability as well (Padilla et al 2014;Furuya et al 2006;Gerscovich et al 2006;Kukemilks et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…The modeling showed no pronounced overall effect of groundwater on hillslope stability; however, preferential flow increased pore water pressures in the foot of slope, an effect which can contribute to landslides (Shao et al 2015). Kukemilks et al (2018) compared the effect of two preferential flow conceptualization approaches on hillslope stability. Dual-permeability and discrete fracture conceptualization approaches were used in a coupled hydrogeological and slope stability modeling (Kukemilks et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Kukemilks et al (2018) compared the effect of two preferential flow conceptualization approaches on hillslope stability. Dual-permeability and discrete fracture conceptualization approaches were used in a coupled hydrogeological and slope stability modeling (Kukemilks et al 2018). When applying the dual-permeability conceptualization approach, no significant effect on the hillslope stability was determined (Kukemilks et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Dual-permeability and discrete fracture conceptualization approaches were used in a coupled hydrogeological and slope stability modeling (Kukemilks et al 2018). When applying the dual-permeability conceptualization approach, no significant effect on the hillslope stability was determined (Kukemilks et al 2018). However, when the groundwater flow in the discrete fracture was considered, groundwater discharging from the fracture caused elevated pore water pressures and a significant decrease of slope stability was observed (Kukemilks et al 2018).…”

Section: Introductionmentioning

confidence: 99%

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Physically based hydrogeological and slope stability modeling of the Turaida castle mound

et al. 2018

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This study explores the potential of integrating state-ofthe-art physically based hydrogeological modeling into slope stability simulations to identify the hydrogeological triggers of landslides. Hydrogeological models considering detailed morphological, lithological, and climatic factors were elaborated. Groundwater modeling reveals locations with elevated pore water pressures in the subsurface and allows the quantification of temporal dynamics of the pore water pressures. Results of the hydrogeological modeling were subsequently applied as boundary conditions for the slope stability simulations. The numerical models illustrate that the hydrogeological impacts affecting hillslope stability are strongly controlled by local groundwater flow conditions and their conceptualization approach in the hydrogeological model. Groundwater flow itself is heavily influenced by the inherent geological conditions and the dynamics of climatic forcing. Therefore, both detailed investigation of the landslide's hydrogeology and appropriate conceptualization and scaling of hydrogeological settings in a numerical model are essential to avoid an underestimation of the landslide risk. The study demonstrates the large potential in combining state-of-the-art computational hydrology with slope stability modeling in realworld cases.

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Section: Slope Stability Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Physically based hydrogeological and slope stability modeling of the Turaida castle mound

et al. 2018

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Morphological and structural characteristics of preferential flow and its influencing factors on colluvial deposits of Benggang

Zhang,

Zhan,

Zhang

et al. 2024

Earth Surf Processes Landf

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Preferential flow plays a vital role in infiltration processes in structured soil. However, knowledge of preferential flow in colluvial deposits of Benggang remains limited. In this study, three typical colluvial deposits with different formation times were selected. The formation times of colluvial deposits A, B and C increased in sequence. Water infiltration in colluvial soil was visualized through Brilliant Blue dye experiments (a total of 90 photos from the dyed soil profiles). The dye morphological characteristics of preferential flow were analysed, and the influencing factors were explored. The dye morphological parameters confirmed the occurrence of preferential flow in the colluvial deposits. The dye coverage of colluvial deposit A was the greatest (61.12%), followed by colluvial deposits B (50.41%) and C (46.81%). The matrix flow depth, preferential flow fraction and length index of colluvial deposits A and B were greater than those of colluvial deposit C. Preferential flow was more notable in colluvial deposits A and B than in colluvial deposit C. The migration process of dyed water varied spatially. There were more preferential flow paths at a 10 cm horizontal width. In addition to the bulk density and saturated hydraulic conductivity, the soil particle composition, especially the gravel content (r = 0.740), was closely related to the observed dye coverage. According to the principal component analysis results, the soil particle composition imposed the greatest influence on the formation of preferential flow in the colluvial deposits, with a contribution of 45.24%. The results provide a theoretical reference for explaining the mechanism of soil infiltration processes and a systematic basis for the treatment of colluvial deposits.

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Evolution of the hydrogeological structure and disaster-generating mechanisms of landslides in loess slopes of the southern Jingyang Plateau, Shaanxi, China

Wang

et al. 2020

Hydrogeol J

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Conceptualization of preferential flow for hillslope stability assessment

Cited by 16 publications

References 32 publications

Physically based hydrogeological and slope stability modeling of the Turaida castle mound

Physically based hydrogeological and slope stability modeling of the Turaida castle mound

Morphological and structural characteristics of preferential flow and its influencing factors on colluvial deposits of Benggang

Evolution of the hydrogeological structure and disaster-generating mechanisms of landslides in loess slopes of the southern Jingyang Plateau, Shaanxi, China

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