A5036157952- Landslides and related hazards
- Hydrology and Sediment Transport Processes
- Soil erosion and sediment transport
- Geology and Paleoclimatology Research
- earthquake and tectonic studies
- Geological formations and processes
- Cryospheric studies and observations
- Hydrology and Watershed Management Studies
- Flood Risk Assessment and Management
- Tree Root and Stability Studies
- Granular flow and fluidized beds
- Methane Hydrates and Related Phenomena
- Seismology and Earthquake Studies
- Seismic Imaging and Inversion Techniques
- Fire effects on ecosystems
- Remote Sensing and Land Use
- Remote Sensing and LiDAR Applications
- Hydrocarbon exploration and reservoir analysis
- Soil and Unsaturated Flow
- Maritime and Coastal Archaeology
- Climate change and permafrost
- Geological Modeling and Analysis
- 3D Surveying and Cultural Heritage
- Aeolian processes and effects
- Groundwater flow and contamination studies
Sir Arthur Lewis Community College
2021
Lamont-Doherty Earth Observatory
2008-2019
Columbia University
2008-2019
National Taiwan University
2016
University of Cambridge
2000
Géosciences Rennes
1997
Université de Rennes
1997
University of Oxford
1997
University of Leeds
1991
Keele University
1991
Research Article| March 01, 1997 Sediment flux from a mountain belt derived by landslide mapping Niels Hovius; Hovius 1Department of Earth Sciences, University Oxford, Parks Road, Oxford OX1 3PR, United Kingdom Search for other works this author on: GSW Google Scholar Colin P. Stark; Stark 2Géosciences, Université de Rennes, Campus Beaulieu, 35042 France Philip A. Allen Author and Article Information Publisher: Geological Society America First Online: 02 Jun 2017 Online ISSN: 1943-2682...
Research Article| August 01, 2004 Earthquake-triggered increase in sediment delivery from an active mountain belt Simon J. Dadson; Dadson 1Department of Earth Sciences, University Cambridge, Downing Street, Cambridge CB2 3EQ, UK Search for other works by this author on: GSW Google Scholar Niels Hovius; Hovius Hongey Chen; Chen 2Department Geosciences, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, Taiwan, Republic China W. Brian Dade; Dade 3Department Dartmouth College,...
Landslide size distributions generally exhibit power‐law scaling over a limited scale range. The range is set by the mapping resolution, number of observed events, and slope failure process itself. This property self‐similarity an important insight into physics hillslope failure. Typically, however, large proportion landslide data does not fit simple power law. These are always ignored in order to characterize scaling. We show that sets from New Zealand Taiwan two regimes, separated...
A strong coupling between hillslope and valley systems is often inferred for mountain landscapes dominated by bedrock landsliding. We reveal the nature of this link using data sets on landsliding sediment transport from two montane catchments draining eastern Central Range Taiwan. Here, magnitude‐frequency distribution landslides can be modeled a robust power law, but scale invariance not mirrored in discharge at front. Instead, downstream loads reflect complex response to both supply...
Catastrophic landslides involve the acceleration and deceleration of millions tons rock debris in response to forces gravity dissipation. Their unpredictability frequent location remote areas have made observations their dynamics rare. Through real-time detection inverse modeling teleseismic data, we show that landslide are primarily determined by length scale source mass. When combined with geometric constraints from satellite imagery, seismically force histories yield estimates duration,...
Landslide‐driven erosion is controlled by the scale and frequency of slope failures consequent fluxes debris off hillslopes. In this paper, we tackle magnitude‐frequency part process develop a theory initial failure mobilization that reproduces heavy‐tailed distributions (probability density function or PDFs) observed for landslide source areas volumes. Landslide rupture propagation treated as quasi‐static, noninertial simplified elastoplastic deformation with strain weakening; runout not...
Climate controls landscape evolution, but quantitative signatures of climatic drivers have yet to be found in topography on a broad scale. Here we describe how topographic signature typhoon rainfall is recorded the meandering incising mountain rivers western North Pacific. Spatially averaged river sinuosity generated from digital elevation data peaks typhoon-dominated subtropics, where extreme and flood events are common, decreases toward equatorial tropics mid-latitudes, such extremes rare....
Abstract Glacial retreat in recent decades has exposed unstable slopes and allowed deep water to extend beneath some of those slopes. Slope failure at the terminus Tyndall Glacier on 17 October 2015 sent 180 million tons rock into Taan Fiord, Alaska. The resulting tsunami reached elevations as high 193 m, one highest runups ever documented worldwide. Precursory deformation began before failure, event left a distinct sedimentary record, showing that geologic evidence can help understand past...
Abstract Joint interpretation of long‐ and short‐period seismic signals generated by landslides sheds light on the dynamics slope failure, providing constraints landslide initiation termination main phases acceleration deceleration. We carry out a combined analysis two massive that struck Bingham Canyon Mine pit 10 April 2013. Inversion long‐period waveforms yields time series for bulk forces momenta, from which we deduce runout trajectories consistent with deposit morphology. Comparing...
Research Article| December 01, 1998 Landslide-driven drainage network evolution in a pre-steady-state mountain belt: Finisterre Mountains, Papua New Guinea Niels Hovius; Hovius 1Department of Geology, Trinity College, Dublin 2, Ireland Search for other works by this author on: GSW Google Scholar Colin P. Stark; Stark 2Lamont Doherty Earth Observatory Columbia University, Palisades, York 10964 Matthew A. Tutton; Tutton 3Geological Survey Guinea, Private Bag, Port Moresby, Lon D. Abbott...
The evolution of many mountain landscapes is controlled by the incision bedrock river channels. While rate set channel shape through its mediation flow, itself history erosion. This feedback between geometry and determines speed landscape response to tectonic or climatic forcing. Here, a model for dynamics derived from geometric arguments, normal flow approximation threshold bed shear stress assumption abrasion. describe competing effects widening, tilting, bending, variable depth. Transient...
The active Psatha–Skinos normal fault is uplifting a contrasting variety of lithologies in its footwall, including Mesozoic limestones, ophiolitic peridotites and poorly-consolidated Plio-Pleistocene sediments the inactive Megara basin. In latter basin, linear marginal uplands border sedimentary fill are interpreted as degraded segmented scarp lines which exhibit features such facetted spurs. Drainage domains defined groups drainage basins sharing common tectono-geological substrate....
ABSTRACT Sediments produced by landslides are crucial in the sediment yield of a catchment, debris flow forecasting, and related hazard assessment. On regional scale, however, it is difficult time consuming to measure volumes such sediment. This paper uses LiDAR‐derived digital terrain model (DTM) taken 2005 2010 (at 2 m resolution) accurately obtain landslide‐induced that resulted from single catastrophic typhoon event heavily forested mountainous area Taiwan. The induced Typhoon Morakot...
Abstract In meandering rivers cut into bedrock, erosion across a channel cross‐section can be strongly asymmetric. At meander apex, deep undercutting of the outer bank result in formation hanging cliff (which may drive hillslope failure), whereas inner adjoins slip‐off slope that connects to itself. Here we propose physically‐based model for predicting planform migration and incision, point bar formation, bedrock abrasion, spatial distribution alluvial cover, adaptation width mixed...
Abstract. We carry out a combined analysis of the short- and long-period seismic signals generated by devastating Oso-Steelhead landslide that occurred on 22 March 2014. The records show was not single slope failure, but succession multiple failures distinguished two major collapses approximately 3 min apart. first surface waves were recorded at several proximal stations. invert these for forces acting source, obtain estimates failure runout kinematics, as well its mass after calibration...
The relationship between bulk‐mass dynamic properties of catastrophic landslides and the generation short‐period seismic waves is investigated, with a particular focus on momentum landslide mass envelope high‐frequency seismograms. Twelve very large that occurred in different geological settings worldwide 1999 2014 are selected for study, based existence detailed descriptions their force histories, determined from long‐period (frequency lower than 0.1 Hz), as well availability nearby...