Glacier Retreat in Eastern Himalaya Drives Catastrophic Glacier Hazard Chain

Geophysical Research Letters, Journal Year: 2024, Volume and Issue: 51(8)

Published: April 10, 2024

Abstract Cryospheric responses to climate warming include glacier retreat, altitude‐dependent thermal instability, and abundant meltwater, which increase the frequency of catastrophic hazard chain (CGHC) events. Here we investigated formation mechanism a special CGHC event in 2018, Sedongpu Glacier, Eastern Himalayas, China. Based on multi‐source remote sensing, seismic signal analysis, numerical simulation, conducted long‐term retrospective analysis co‐event process reconstruction. The results show that could be divided into two phases. First, hanging with volume 8.5 × 10 6 m 3 collapsed onto downstream trunk glacier. Next, ∼1.17 8 eroded materials from impacted transformed debris flow traveled km. During cascading process, ice‐rock avalanche momentum velocity are key factors determining eventual volume. Our study helps better understand domino effects disaster.

Language: Английский

---

Deformation Mechanism of Large‐Scale Ancient Reservoir Landslides Driven by the Monitoring Data and Numerical Simulation

Geological Journal, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

ABSTRACT Globally, the reactivation of ancient landslides in reservoir areas poses severe threats to safety human society and natural environment, attracting widespread attention fields science engineering. The periodic water level fluctuations precipitation are main reasons for landslides, complexity landslide disaster prevention control is expected increase due combined effects both factors. In this study, a comprehensive method on‐site investigation, displacement monitoring, numerical simulation has been proposed analyse seepage field, stability, deformation field by considering Qingshi Three Gorges Reservoir Area (TGRA) as an example. used simulate dynamic evolution process landslide, measured data validates accuracy method. results indicate that rainfall significantly affect stability landslide. activity dominated fluctuations, rather than rainfall. addition, study also identifies potential sliding surface predicts possible mode instability. This research can provide technical support decision‐making reference early warning disasters areas.

Language: Английский

---

Review on the Geophysical and UAV-Based Methods Applied to Landslides

Remote Sensing, Journal Year: 2022, Volume and Issue: 14(18), P. 4564 - 4564

Published: Sept. 13, 2022

Landslides (LS) represent geomorphological processes that can induce changes over time in the physical, hydrogeological, and mechanical properties of involved materials. For geohazard assessment, variations these might be detected by a wide range non-intrusive techniques, which sometimes confusing due to their significant variation accuracy, suitability, coverage area, logistics, timescale, cost, integration potential; this paper reviews common geophysical methods (GM) categorized as Emitted Seismic Ambient Noise based proposes an integrated approach between them for improving landslide studies; level (among themselves) is important step ahead integrating data with remote sensing data. The aforementioned GMs help construct framework on physical may linked site characterization (e.g., its subsurface channel geometry, recharge pathways, rock fragments, mass flow rate, etc.) dynamics quantification rheology, saturation, fracture process, toe erosion, deformation marks spatiotemporally dependent geogenic pore-water pressure feedback through joint analysis series, displacement hydrometeorological measurements from ground, air space). A review use unmanned aerial vehicles (UAV) photogrammetry investigation landslides was also conducted highlight latest advancement discuss synergy UAV four possible broader areas: (i) survey planning, (ii) LS investigation, (iii) (iv) presentation results GIS environment. Additionally, endogenous source mechanisms lead appearance surface provide ground monitoring early warning systems. Further development area requires UAVs adopt more multispectral other advanced sensors where are one well climatic enable Artificial Intelligent prediction LS.

Language: Английский

---

Review of Landslide Monitoring Techniques With IoT Integration Opportunities

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Journal Year: 2022, Volume and Issue: 15, P. 5317 - 5338

Published: Jan. 1, 2022

With the advancements of technology in era big data and artificial intelligence, IoT (Internet Things) has a major role for purpose monitoring natural disasters like landslides. Landslides are catastrophic disaster worldwide that alter from terrain to terrain. In pursuit saving communities endangered by landslides, many techniques practiced. This paper is survey landslide adapted different parts world monitor unstable slopes. It provides glance into challenges opportunities integrating techniques, which explained briefly with emphasis on real-world case studies. Each technique presented regarding kind parameters, type landslides it can monitor, investigating phases, advantages, disadvantages, possibility integrate each techniques. also aims provide an overview general non-specialist field. The classified based (fall, topple, slide, spread, flow, slope deformation), velocity (slow, moderate, rapid), parameters (meteorological, geological, hydro-geological, physical, geophysical), phases (spatial, temporal) early-warning systems classification will serve as guideline (but not replacement expert advice) selecting appropriate classifications expressed through visual representations.

Language: Английский

---

Influence of tensile crack development on the deformation behavior and failure mode of reservoir-induced landslides: insights from model tests

Landslides, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

Language: Английский

---

Seismic Advances in Process Geomorphology

Annual Review of Earth and Planetary Sciences, Journal Year: 2022, Volume and Issue: 50(1), P. 183 - 204

Published: Jan. 6, 2022

One of the pillars geomorphology is study geomorphic processes and their drivers, dynamics, impacts. Like all activity that transfers energy to Earth's surface, a wide range process types create seismic waves can be measured with standard instruments. Seismic signals provide continuous high-resolution coverage spatial footprint vary from local global, in recent years, efforts exploit these for information about surface have increased dramatically, coalescing into emerging field environmental seismology. The application methods has potential drive advances our understanding occurrence, timing, triggering events, dynamics processes, fluvial bedload transport, integrative system monitoring. As new applications move development proof concept routine application, integration between geomorphologists seismologists key continued progress. ▪ Geomorphic on produces are driving triggering, internal processes. Dedicated seismic-based observatories offer comprehensively characterize its impacts across landscape. Collaboration fostering applications, models, analysis techniques

Language: Английский

---

Advanced monitoring of tailings dam performance using seismic noise and stress models

Communications Earth & Environment, Journal Year: 2022, Volume and Issue: 3(1)

Published: Nov. 30, 2022

Abstract Tailings dams retain the waste by-products of mining operations and are among world’s largest engineered structures. Recent tailings dam failures highlight important gaps in current monitoring methods. Here we demonstrate how ambient noise interferometry can be applied to monitor performance at an active using a geophone array. Seismic velocity changes less than 1% correlate strongly with water level adjacent pond. We implement power-law relationship between effective stress shear wave velocity, pond recordings profiles obtained from cone penetration tests model velocities. The resulting one-dimensional shows good agreement seismic changes. As provides direct measure soil stiffness used infer numerous other geotechnical design parameters, this method advances understanding over time.

Language: Английский

---

Understanding slow-moving landslide triggering processes using low-cost passive seismic and inclinometer monitoring

Journal of Applied Geophysics, Journal Year: 2023, Volume and Issue: 215, P. 105090 - 105090

Published: June 1, 2023

Landslides are a major natural hazard, threatening communities and infrastructures worldwide. Mitigation of these hazards relies on understanding their causes triggering processes, which critically depend subsurface characteristics variations over time. In this study, we present novel approach combining passive seismic low-cost inclinometer monitoring methods to improve the landslide activation mechanisms controls. We evaluate efficiency shallow, slow-moving directly endangering road bridge, bridge that is part an important emergency response route. Results show value two approaches for observing hazards. Passive captures variation in soil properties (rigidity density) time by sensing wave velocity (dV/V its associated correlation coefficient). At same time, inclinometers deformation (from millimetric pluricentimetric scale) temperature. Seismic precursors detected at bottom sensor few hours prior reactivation followed toe, releasing stresses top lead whole landslide. This occurs during episode heavy rainfall following 7-month drought. Meanwhile, temperature enables us track water infiltration highlight role mechanisms. Overall, combination shows promise quantifying sliding reactivations designing early warning systems.

Language: Английский

---

Insight into the overload failure mechanism of anchored slope with weak structural planes

Bulletin of Engineering Geology and the Environment, Journal Year: 2024, Volume and Issue: 83(10)

Published: Sept. 9, 2024

Language: Английский

---

Monitoring the changing seismic site response of a fast-moving rockslide (Brienz/Brinzauls, Switzerland)

Geophysical Journal International, Journal Year: 2021, Volume and Issue: 229(1), P. 299 - 310

Published: Nov. 18, 2021

SUMMARY Seismic measurements on unstable rock slopes are a complementary tool to surface displacement surveys characterize and monitor landslides. A key parameter is seismic amplification, which tends scale with the degree of mass degradation. Amplification also provides direct measure how wavefield intensified during loading, eventually leading coseismic failure. Here we present dynamic response fast-moving Brienz/Brinzauls slope instability in Switzerland (10 $ \times 106 25 m3), threatens settlements infrastructure area. The rockslide shows strong amplification at two resonant frequencies factors up 11 polarization influenced by local fracture network orientation. We monitored over period 30 months using ambient vibrations regional earthquake recordings. observed change 50°, coinciding rotation relative vector field measured geodetic systems, highlighting linkage between stress (i.e. kinematics). For analysis secondary, displacements, propose singular value filtering remove principal component landslide motion. In addition, found increased values after periods precipitation, providing empirical evidence that precipitation history for assessing hazard earthquake-induced

Language: Английский

---