A landslide in Heifangtai, northwest of the Chinese Loess Plateau: triggered factors, movement characteristics, and failure mechanism

Kong, Jiaxu; Zhuang, Jian; Zhan, Jiewei; Bai, Zhengwei; Wang, Zuo-peng; Gu, Tianfeng; Sun, Jiaxing; Zhang, Fanchen; Xu, Youlong; Wang, Ye; Mu, Jiaqi; Fan, Hong-yu

doi:10.1007/s10346-021-01752-z

Cited by 18 publications

(4 citation statements)

References 26 publications

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“…9b), manifests itself as an annual occurrence commencing in the month of May, wherein the subterranean water level in the immediate vicinity of the landslide experiences a continual ascent owing to the relentless torrential downpours besetting the area. This unceasing ascent of the water table exerts a pronounced in uence on the distribution of pore water pressure within the loess formation on the slope (Kong et al 2021). In tandem with the persistent rainfall events, the saturated expanse at the base of the loess stratum expands, engendering a hydraulic ow from the saturated region to the unsaturated realm, consequently inducing a surge in pore water pressure.…”

Section: Landslide B Evolution Processmentioning

confidence: 99%

Analysis of landslide deformation in eastern Qinghai Province, Northwest China, using SBAS-InSAR

Tian,

Kou,

et al. 2024

Nat Hazards

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Landslides are prevalent in the ecologically fragile loess plateau of central China. However, research on the monitoring and assessment of large-scale landslides is scarce. This study collected 31 ascending and descending Sentinel-1A images from January 4, 2020, to August 9, 2022. The Small Baseline Subset Synthetic Aperture Radar Interferometry (SBAS-InSAR) technique was utilized to quantify subsidence, indirectly re ecting the deformation rate of landslides in the Loess Plateau. The research ndings reveal that during the study period, the average line-of-sight (LOS) surface displacement rate in the region reached 118 mm/yr, with a maximum offset distance of 298 mm. The results showed, 491 active, hazardous landslides clustered within the region, with 14 landslides posing extreme risks to the Yellow River, highways and over 10,000 residents. We discovered an uneven distribution of landslides within the study area, likely attributed to complex geological backgrounds and environmental conditions. Continuous tension crack formation was observed as landslide fronts slid rapidly, which could be easily detected on satellite maps. The formation of landslides was in uenced by various factors, and this study statistically investigated factors such as DEM, Aspect, Slope, and NDVI. landslides were mainly distributed within a slope range of 20-40°. Additionally, a comprehensive analysis was conducted on the geomorphological features, displacement magnitudes, and potential hazards and risk levels to the surrounding environment for 14 representative landslides. we observed a high correlation between landslide displacement and monthly precipitation. The research ndings are of signi cant importance in understanding landslide activity, deformation processes, and conducting risk assessments for landslides.

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Section: Landslide B Evolution Processmentioning

confidence: 99%

Analysis of landslide deformation in eastern Qinghai Province, Northwest China, using SBAS-InSAR

Tian,

Kou,

et al. 2024

Nat Hazards

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“…For example, in the Heifangtai area of Gansu, long-term infiltration due to agricultural irrigation has raised groundwater levels, causing the water-sensitive loess to weaken significantly when saturated. This ultimately leads to slope instability (Kong et al, 2021;Bian et al, 2022).…”

Section: Influence Of Human Engineering Activities On the Stability O...mentioning

confidence: 99%

Deformation mechanism of Large Deep Loess-mudstone Landslide under the Coupling effect of Loess Collapsibility and Earthquakes: A Case Study of the Yangpo Landslide in Min County, Gansu Province, China

Guo,

Cao,

Liu

et al. 2024

Preprint

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Loess-mudstone landslides have become the most developed type of landslides on the Loess Plateau due to their ‘double-layer heterogeneous’ structure. Currently, there is a lack of research on the deformation and failure mechanisms of loess-mudstone landslides considering the coupling effects of loess collapsibility and seismic activity. This manuscript investigates the spatial structure and deformation characteristics of a large loess-mudstone landslide in Yangpo Village, Min County, Gansu Province, and the deformation characteristics and mechanisms were investigated by combining numerical simulation methods based on the Swell elastic-plastic model. The research results show: the volume of the Yangpo landslide is approximately 4.65 × 106 m³. The development of three layers of sliding zone, sliding zone is mainly developed in the loess and accumulation of body and mudstone junction, the maximum burial depth of 36.0 ~ 37.0 m. During the water saturation process, the loess structure is damaged due to the surface tension of clay particles (ts) and matric suction (s), resulting in surface cracks and uneven settlement, which can locally evolve into sinkholes. Numerical simulation indicates that under the action of loess collapsibility, the loess-mudstone landslide produces uneven vertical deformation, with the maximum vertical displacement increasing to 0.71 m. Some areas of the loess layer develop plastic damage zones. Under the coupling effect of loess collapsibility and seismic activity, the uneven settlement deformation of the loess continues to increase, with the maximum vertical displacement reaching 3.71 m. loess collapsibility is identified as a key factor in the deformation and failure of loess-mudstone landslides, with seismic activity exacerbating the deformation and failure. The research findings have significant theoretical implications for understanding the deformation characteristics and stability evaluation of large loess-mudstone landslides under the coupling effects of loess collapsibility and seismic activity. The results could provide geological support for disaster prevention and mitigation of loess-mudstone landslides.

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“…Parameter calibration has always been an important problem in numerical simulation. The existing research mostly determines parameters through inversion analysis, such as comparing indoor mechanical tests with numerical simulation mechanical tests or comparing the landslide cases that have occurred with the landslide characteristics under the numerical simulation [40]. Although the current research has achieved certain results, it is still difficult to determine its parameters in the prediction of the risk of landslide dams because its accumulation characteristics and evolution range are unknown.…”

Section: Parameter Calibrationmentioning

confidence: 99%

Research on Development Characteristics and Landslide Dam Hazard Prediction of Zhuangfang Landslide in the Upper Reaches of the Nu River

Di,

Wei,

Tan

et al. 2023

Sustainability

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The upper reaches of the Nu River have strong tectonic activities and broken rock mass structures, often causing landslide disasters. The Zhuangfang landslide has apparent signs of surface deformation, and there is a risk of further sliding and blocking of the river. Taking the Zhuangfang landslide as an example, this paper analyzes the development characteristics and stability through geological field surveys, a drone aerial survey, field drilling, and GEO5 geotechnical engineering software. Then through the indoor tests and RAMMS numerical simulation software, the parameters of the landslide are determined, and the risk of a landslide dam is analyzed. Our results demonstrated that the Zhuangfang landslide is a large-scale landslide with a volume of about 4.5 × 106 m3. The front edge of the landslide is seriously deformed and is in an under-stable state, with risks of sliding and river blockage. The numerical simulation results showed that the total movement time of the landslide was 130 s, and the landslide entered the Nu River at 55 s. However, the landslide does not completely block the river and cannot form a landslide dam. The study proposed a parameter inversion method to determine the landslide mass parameters based on RAMMS numerical simulation software. The related results of this study can provide a reference for the sustainable development of the ecological environment in the Nu River Basin.

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A landslide in Heifangtai, northwest of the Chinese Loess Plateau: triggered factors, movement characteristics, and failure mechanism

Cited by 18 publications

References 26 publications

Analysis of landslide deformation in eastern Qinghai Province, Northwest China, using SBAS-InSAR

Analysis of landslide deformation in eastern Qinghai Province, Northwest China, using SBAS-InSAR

Deformation mechanism of Large Deep Loess-mudstone Landslide under the Coupling effect of Loess Collapsibility and Earthquakes: A Case Study of the Yangpo Landslide in Min County, Gansu Province, China

Research on Development Characteristics and Landslide Dam Hazard Prediction of Zhuangfang Landslide in the Upper Reaches of the Nu River

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