A5000281854- Landslides and related hazards
- earthquake and tectonic studies
- Cryospheric studies and observations
- Geological and Geophysical Studies
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Remote Sensing and LiDAR Applications
- Geology and Paleoclimatology Research
- Geological formations and processes
- Hydrology and Sediment Transport Processes
- Fire effects on ecosystems
- Tree Root and Stability Studies
- Geophysics and Gravity Measurements
- Flood Risk Assessment and Management
- Soil erosion and sediment transport
- Geological and Geochemical Analysis
- Geophysical and Geoelectrical Methods
- Seismic Waves and Analysis
- Seismology and Earthquake Studies
- Pleistocene-Era Hominins and Archaeology
- Coastal wetland ecosystem dynamics
- 3D Surveying and Cultural Heritage
- Methane Hydrates and Related Phenomena
- Hydrology and Watershed Management Studies
- Geotechnical Engineering and Analysis
- Climate change and permafrost
National Taipei University of Technology
2021-2023
Academia Sinica
2010-2021
National Taiwan University
2021
Bridge University
2021
National Yang Ming Chiao Tung University
2012-2021
Chinese Culture University
2010-2020
Institute of Earth Sciences, Academia Sinica
2005-2018
Centre National de la Recherche Scientifique
2017
National Science and Technology Council
2012-2014
Institut National des Sciences de l'Univers
2012-2014
Steep topographic reliefs and heavy vegetation severely limit visibility when examining geological structures surface deformations in the field or detecting these features with traditional approaches, such as aerial photography satellite imagery. However, a light detection ranging (LiDAR)-derived digital elevation model (DEM), which is directly related to bare ground surface, successfully employed map signatures an appropriate scale accuracy facilitates measurements of fine features. This...
Abstract. Several remote sensing techniques, namely traditional aerial photographs, an unmanned aircraft system (UAS), and airborne lidar, were used in this study to decipher the morphological features of obscure landslides volcanic regions how observed may be for understanding landslide occurrence potential hazard. A reconstruction method was proposed assess morphology based on dome-shaped topography edifice nature its evolution. Two large-scale Tatun volcano group northern Taiwan targeted...
Water saturation in the bedrock or colluvium is highly related to most landslide hazards, and rainfall likely a crucial factor. The dynamic processes of onsite rock/soil mechanics could be revealed via monitoring using electrical resistivity tomography (ERT) technique Archie’s law. This study aims investigate water changes over time time-lapse ERT images, providing powerful method for events. A fully automatic remote system was deployed acquire hourly data nontraditional hybrid array Lantai...
The Tsaoling Landslide in Taiwan has captured attentions of researchers worldwide due to its frequent catastrophic failure and distinctive features. Thanks the launch TerraSAR-X/TanDEM-X (TSX/TDX) constellation, retrieval global DEM with high spatial resolution accuracy becomes possible, which is extremely useful for study natural hazards (e.g., landslides) globally. We attempt here first time track recent landslide movements by analyzing series reconstructed from TSX/TDX image pairs....
Due to the increasing impacts of global climate change in recent years, nations around world have been grappling with frequent natural disasters. Taiwan, situated on Pacific Rim seismic belt, is shaped by active orogeny, resulting its rugged terrain. The island has experienced numerous typhoons, extreme rainfall, and complex hydrological conditions, making mountainous areas particularly vulnerable accumulation soil sediment further alters landscape watersheds, putting both infrastructure...
The Longitudinal Valley in Eastern Taiwan sits at the collision suture between Eurasian and Philippine Sea plates. Based on repeated GPS campaigned measurements from 25 stations six times 2007 - 2009, we characterize surface deformation northernmost where Coastal Range of plate turns northward diving under producing two major active faults: Milun fault fault. We reconstructed a velocity field conducted strain analyses elastic block modeling. Our results suggest rapid clockwise rotation 33°...
In Taiwan, landslides pose serious threats to local residents and infrastructures each year due high mountain relief distinct seasonal precipitation distribution. Interferometric synthetic aperture (InSAR) provides a powerful tool map terrain motion characterize the failure mechanism of unstable slopes. However, it is challenging for conventional InSAR technique obtain reliable landslide information in mountainous regions because insufficient coherent measurements signal confusion caused by...
This study uses three periods of airborne laser scanning (ALS) digital elevation model (DEM) data to analyze the short-term erosional features Tsaoling landslide triggered by 1999 Chi-Chi earthquake in Taiwan. Two methods for calculating bedrock incision rate, equal-interval cross section selection method and continuous swath profiles method, were used after nearly ten years gully following earthquake-triggered dip-slope landslide. Multi-temporal rates obtained using which is considered a...
The Nankan lineament and the Shanchiao normal fault are two major "structures" at western eastern boundaries of Linkou Tableland.In contrast to fault, tectonic causes have been studied yet results rather inconsistent controversial.The morphologic evolution is often result processes which can be regarded as key information for revealing activity.This study takes advantage high-resolution LiDAR images re-examine activities based on its morphological features.High-resolution enable detailed...
The diversity of the research in earth sciences leads to a multisource approach investigate surroundings Taiwan.Various data sets com bined by Geographical Information System (GIS) enable us propose an integrated neotectonic map onshore-offshore Taiwan.Several techni cal problems arise during compilation this map, such as homoge neity scales, projections and geodetic systems used, validity pre cision each set (line pixel) document, integration qualitative quantitative documents.Various types...
Numerical scenario simulation may serve as an efficient and powerful tool for hazard assessment, but it often suffers from the lack of a definite failure surface before occurrence failure. In present study, idealized curved (ICS) is proposed mimicking sliding in numerical simulation. Different conventional Sloping Local Base Level (SLBL) or Scoops3D method, this consists two curvatures, which are defined down-slope cross-slope directions, respectively. Applying to 45 historical landslides...
The Tatun Volcano Group (TVG) is located at the northern coast of Taiwan Island with only 15 km to Taipei metropolis. Recent geothermal and geochemical studies suggest that TVG dormant-active rather than extinct, implying eruption potential devastate nearby area 7 million inhabitants. Although some geodetic tools (e.g., global positioning system precise leveling) have been utilized analyze activity associated volcanism, it still challenging for conventional interferometric synthetic aperture...
Rainfall is one of the most important triggers both shallow debris flows and deep-seated landslides. The triggering mechanism involves process water infiltration into failure zone. For landslides, deeper more extensive surfaces delay effect thus landslide initiations. difficult to assess, especially if sites only have scarce or insufficient monitoring data. Under these circumstances, we illustrate that occurrences landslides can be estimated by their correlations with phenomenological...