Abstract A large, deep-seated ancient landslide was partially reactivated on 17 June 2020 close to the Aniangzhai village of Danba County in Sichuan Province Southwest China. It initiated by undercutting toe this resulting from increased discharge Xiaojinchuan River caused failure a dam, which had been created debris flow originating Meilong valley. As result, 12 townships downstream area were endangered leading evacuation more than 20000 people. This study investigated optical and radar...

Determining the timing of landslide occurrence is crucial for establishing an accurate, comprehensive and systematic inventory while assessing potential reducing risk. Unfortunately, many existing inventories lack temporal information such as precise time events. Optical Synthetic Aperture Radar (SAR) sensors are most commonly used remote sensing technologies detection. Unlike optical sensors, SAR not affected by cloudy conditions provide valuable imagery regardless sunlight availability....

Anthropogenic activities, including the operation of reservoirs and infrastructure expansion, coupled with extreme climatic events are increasing landslide hazards worldwide, but information on detailed impact these factors slope stability is often lacking. In-situ monitoring systems in potential landslide-prone areas unavailable, challenging hazard assessment. This study comprises a multi-scale multi-sensor satellite remote sensing approach combination advanced statistical methods to...

Using SAR and InSAR technology, artificial corner reflectors (CR) are popular coherent targets for monitoring ground instability with sub-centimeter accuracy in non-urban areas. In this letter, we investigate the performance of a newly designed small dihedral reflector post-failure creep at Aniangzhai landslide Danba County, China. The new double geometry CRs consist two sets semi-circular metal plates, each 30-40 cm radius perpendicular to other. Six such installed Corner Reflector...

Geological hazards caused by both natural forces and human-induced disturbances, such as land subsidence, earthquakes, tectonic motion, mining activities, coastal erosion, volcanic permafrost alterations, cause great adverse effects to earth’s surface. The preservation of a comprehensive record detailing past, present, future surface movements is imperative for effective disaster risk mitigation property protection. Interferometric Synthetic Aperture Radar (InSAR) widely recognized...

Landslides are a serious geologic hazard common to many countries around the world.  They can result in fatalities and destruction of infrastructure, buildings, roads, electrical equipment. Especially rapid-moving landslides, which occur suddenly travel at high speeds for miles, pose threat life property. Landslide inventories essential understand evolution landscapes, ascertain landslide susceptibility hazard, it be help any further risk analysis. Although  many landslides...

Since the first impoundment in 2003 of Three Gorges Reservoir (TGR), one largest reservoirs world, issues slope instability Area (TGA) have attracted significant worldwide attention. The operation TGR, coupled with anthropogenic activities, has influenced and reactivation plenty landslides region. This study introduces a methodology to assess instabilities over TGA using advanced integration hydrological triggering factors multi-temporal InSAR (MT-InSAR) techniques. Our approach involves...

Global earth's surface is subject to adverse effects of a variety slow and sustained geological hazards, such as land subsidence, earthquake, tectonic motion, mining, landslides, coastal erosion, volcano permafrost, caused by natural forces anthropogenic activities disturbance. Earth observation data enable scientists efficiently assess ground deformation damages posed these hazards result in significant resilience planning. Therefore, preserving complete record past, present, future...

With the avalanche of satellite remote sensing sensors, significant efforts have been made to develop methods integrate optical and SAR efficiently quantify kinematics lifecycle landslides. In this study, we design a framework that integrates multi-sensor data investigate post-failure 17 June 2020 Aniangzhai landslide in Danba County Southwest China. This ancient was partially reactivated due rapid river incision toe erosion during complex cascading event, which led an evacuation relocation...

Anthropogenic activities and environmental changes increase landslide hazards risks to human life, settlements infrastructures worldwide. In-situ monitoring systems over landslide-prone slopes are often unavailable, making failures challenging forecast. This paper proposes a multi-sensor multivariate remote sensing analysis using data from Envisat, Sentinel-1, Landsat PlanetScope satellites combined with GIS mathematical approaches characterise the life cycle of catastrophic that occurred in...

<p>Landslide is one of the major geohazards in Three Gorges area as a result steep valley-side slopes and environmental conditions, e.g., high precipitation. To monitor detect landslides rock falls at regional scale area, differential Synthetic Aperture Radar Interferometry (D-InSAR) technology could be more effective efficient than other conventional geological geodetic measurements that can performed only few sites with proper accessibility...

<p>A large, deep-seated ancient landslide body was partially reactivated close to the Aniangzhai village in southwest of China on 17 June 2020. The catastrophic event occurred as a result a  complex cascading event, started by debris flow triggered heavy rainfall summer. flows, coming from northern Meilonggou Gully, created dammed lake just under and blocked Xiaojinchuan river, leading an increase water level. Thereafter, overflow barrier dam, influenced discharge...

<p>On 17 June 2020, a large debris flow triggered by continuous heavy precipitation hit the Danba County in southwest China, blocked river and barrier lake was formed. Meanwhile, on other side of river, large-scale landslide due to reactivation ancient body. Then an evacuation more than 20000 people leaving their home town urgently conducted.<br>This study exploits multi-sensor remote sensing techniques assess deformation, precursory deformation post-failure...

On 17 June 2020, an ancient landslide was partially reactivated close to the Aniangzhai village of Danba County in Sichuan Province Southwest China. It initiated by erosion slope toe from overflow a dammed lake that created due heavy rainfall and resulting debris flows coming Meilonggou Gully Xiaojinchuan River. In this study, we report investigations on precursory post-failure stability analysis exploiting optical radar satellite remote sensing data. Using sub-pixel cross-correlation data...

Earth and Space Science Open Archive This is a preprint has not been peer reviewed. ESSOAr venue for early communication or feedback before review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]Insights into June 2020 Aniangzhai landslide in Danba County, China: A remote sensing analysis using satellite radar optical data corner reflectorsAuthorsZhugeXiaiDMahdiMotaghTaoLiSigridRoessnerSee all authors Zhuge...