Real-time monitoring instrument designed for the deformation and sliding period of colluvial landslides

Fan, Yueying; Yang, Shuai; Xu, L. K.; Li, S. H.; Feng, Chun; Liang, B. F.

doi:10.1007/s10064-016-0848-8

Cited by 9 publications

(3 citation statements)

References 21 publications

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“…High-precision multi-source remote sensing technology enables the dynamic monitoring of post-earthquake geohazards and offers sophisticated and dependable technical methods for large-scale quantitative studies on gravity erosion and sediment [41]. However, its cost, hardware and software processing requirements, spatial and temporal resolution, and technical threshold have restricted its popularity and applicability [42], and it is challenging to implement real-time monitoring of the gravity erosion process [43]. Therefore, the accuracy and effectiveness of monitoring and evaluating gravity erosion of downslope movement can be further improved when combined with multi-source earth observation technologies such as the unmanned aerial vehicles, three-dimensional laser scanning systems, close-range photogrammetry, and ground-based radars [44,45].…”

Section: Activity Analysis Of Gravity Erosion Of Post-shock Slope Mov...mentioning

confidence: 99%

Post-Shock Gravitational Erosion and Sediment Yield: A Case Study of Landscape Transformation along the Wenchuan–Yingxiu Section of the Minjiang River, Sichuan, China

et al. 2023

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In Wenchuan, China, which was severely affected by an M8.1 earthquake in 2008, the geomorphic process has been driven by gravitational erosion brought on by post-shock rockfalls and landslides. However, a process-based delineation of the post-shock landscape modification using quantitative methods employing mathematical modeling and control experiments has not yet been successfully undertaken. This is due to the areas’ substantial sediment yield and growing transportation capacity. This study looked into 31 minor watersheds along the Minjiang River’s Wenchuan–Yingxiu stretch. Additionally, a digital gully model based on multi-source remote sensing, Geographic Information System (GIS), Differential Intereferometric Synthetic Aperture Radar (D-InSAR), and amplitude tracking technology was created for the quantitative estimation of post-shock gravity erosion and sediment yield by comparison of three-dimensional topographical alternation (before and after the shock). Following regression analysis, a useful model for sediment yield estimation was suggested. The following conclusions were reached: (1) There was a considerable favorable effect between an angle of 50 and 70 degrees, and various geomorphological parameters had scale effects. Gravitational sediment yield modulus displayed a positive power function relationship with relative relief and surface fragmentation, but there was no clear correlation between the modulus and slope, relative relief, or surface fragmentation at the watershed scale; (2) Both the budget for post-shock geo-materials and the production of sediment from gravity erosion showed an annual trend of decline; (3) A 10–20-year active period would be recognized by gravity erosion.

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Section: Activity Analysis Of Gravity Erosion Of Post-shock Slope Mov...mentioning

confidence: 99%

Post-Shock Gravitational Erosion and Sediment Yield: A Case Study of Landscape Transformation along the Wenchuan–Yingxiu Section of the Minjiang River, Sichuan, China

et al. 2023

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“…Furthermore, the rainfall threshold obtained from statistical data often ignores the triggering mechanisms of the landslide and the influences of physical rainfall infiltration process on the landslide stability, causing early warning methods with a single rainfall threshold to be unreliable (Sidle and Bogaard 2016;Chae et al 2017). To resolve the deficiencies of single rainfall threshold methods, numerous studies using multiple early warning indicators, such as rainfall, slope displacement, and their physical properties, have been conducted for landslide monitoring and early warning worldwide (He 2009;Xu and Zeng 2009;Intrieri et al 2012;Palis et al 2016;Ma et al 2016;Fan et al 2016;He et al 2017). The correlation and contribution of rainfall infiltration to the dynamic evolution of slopes and proposed rainfall threshold values were established in recent years, and the coupling of multivariate indicators in rainfall-induced landslide early warning systems has gradually become more common (Chae et al 2017;Yang et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Application and verification of a multivariate real-time early warning method for rainfall-induced landslides: implication for evolution of landslide-generated debris flows

et al. 2020

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Rainfall-induced landslides are a frequent and often catastrophic geological disaster, and the development of accurate early warning systems for such events is a primary challenge in the field of risk reduction. Understanding of the physical mechanisms of rainfall-induced landslides is key for early warning and prediction. In this study, a real-time multivariate early warning method based on hydro-mechanical analysis and a long-term sequence of real-time monitoring data was proposed and verified by applying the method to predict successive debris flow events that occurred in 2017 and 2018 in Yindongzi Gully, which is in Wenchuan earthquake region, China. Specifically, long-term sequence slope stability analysis of the in situ datasets for the landslide deposit as a benchmark was conducted, and a multivariate indicator early warning method that included the rainfall intensity-probability (I-P), saturation (S i), and inclination (I r) was then proposed. The measurements and analysis in the two early warning scenarios not only verified the reliability and practicality of the multivariate early warning method but also revealed the evolution processes and mechanism of the landslide-generated debris flow in response to rainfall. Thus, these findings provide a new strategy and guideline for accurately producing early warnings of rainfall-induced landslides.

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“…Therefore, a low-cost and portable monitoring method is needed for early warning of landslides in mountainous areas with a large number of landslides, for example in the Wenchuan earthquake region of China. Recent studies stated that the Micro Electro Mechanical Systems (MEMS) based slope stability monitoring instruments and systems are practically versatile and effective, thus it was widely used in landslide monitoring and early warning, and generated considerable recent research interest [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

A Multi-Source Early Warning System of MEMS Based Wireless Monitoring for Rainfall-Induced Landslides

et al. 2017

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Landslide monitoring and early warning systems are the most successful countermeasures to reduce fatalities and economic losses from landslide hazards. The traditional strategies such as GPS and extensometers are relatively expensive and difficult to be installed in steep, high mountains. In this study, a MEMS (Micro Electro Mechanical Systems) based multivariate wireless monitoring sensor unit was used to build a monitoring and early warning system for rainfall-triggered landslides, as one of the most practical and cost-effective countermeasures for hard-reached mountains. The multi-source wireless monitoring system and its well-developed equipment were tested in a landslide-prone slope to monitor the triggering of landslides and debris flows in the Wenchuan earthquake region, China. The variations of several state variables were observed, including the soil moisture content, soil matric suction, rainfall, inclination and ground vibration. The results of a slope stability analysis were benchmarked with the in situ measurements to identify the multivariate early warning parameters for rainfall-induced landslides. The proposed early warning system for the slope stability analysis can provide a more accurate prediction for rainfall-induced landslides and debris flows in earthquake hit regions.

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Real-time monitoring instrument designed for the deformation and sliding period of colluvial landslides

Abstract: A real-time monitoring instrument for colluvial

Cited by 9 publications

References 21 publications

Post-Shock Gravitational Erosion and Sediment Yield: A Case Study of Landscape Transformation along the Wenchuan–Yingxiu Section of the Minjiang River, Sichuan, China

Post-Shock Gravitational Erosion and Sediment Yield: A Case Study of Landscape Transformation along the Wenchuan–Yingxiu Section of the Minjiang River, Sichuan, China

Application and verification of a multivariate real-time early warning method for rainfall-induced landslides: implication for evolution of landslide-generated debris flows

A Multi-Source Early Warning System of MEMS Based Wireless Monitoring for Rainfall-Induced Landslides

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