scholarly journals Computer analysis of slope failure and landslide processes caused by water

2006 ◽  
Author(s):  
I. Sarafis ◽  
J. Zezulak
Keyword(s):  
Computer Analysis ◽  
Slope Failure ◽  
Landslide Processes

scholarly journals Subaqueous mass movements in the context of observations of contemporary slope failure

2020 ◽  
Vol 500 (1) ◽  
pp. 1-12
Author(s):  
Joshu J. Mountjoy ◽  
Aggeliki Georgiopoulou ◽  
Jason Chaytor ◽  
Michael A. Clare ◽  
Davide Gamboa ◽  
...  
Keyword(s):  
Slope Failure ◽  
State Of The Art ◽  
Societal Impact ◽  
Mass Movements ◽  
Spatial And Temporal Scales ◽  
The Past ◽  
Indonesian Archipelago ◽  
Landslide Processes ◽  
New Research

AbstractThe consequences of subaqueous landslides have been at the forefront of societal conscience more than ever in the last few years, with devastating and fatal events in the Indonesian Archipelago making global news. The new research presented in this volume demonstrates the breadth of ongoing investigation into subaqueous landslides, and shows that while events like the recent ones can be devastating, they are smaller in scale than those Earth has experienced in the past. Understanding the spectrum of subaqueous landslide processes, and therefore the potential societal impact, requires research across all spatial and temporal scales. This volume delivers a compilation of state-of-the-art papers covering regional landslide databases, advanced techniques for in situ measurements, numerical modelling of processes and hazards.

scholarly journals The Geo-Hydro-Mechanical Properties of a Turbiditic Formation as Internal Factors of Slope Failure Processes

Geosciences ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 429
Author(s):  
Nunzio Losacco ◽  
Osvaldo Bottiglieri ◽  
Francesca Santaloia ◽  
Claudia Vitone ◽  
Federica Cotecchia
Keyword(s):  
Slope Failure ◽  
Pore Water Pressure ◽  
Fractured Rock ◽  
Water Pressure ◽  
Predisposing Factor ◽  
Internal Factors ◽  
Soil Matrix ◽  
Landslide Processes ◽  
Plastic Clays ◽  
Rock Strata

Similar to many inner areas of Southern Europe, the Daunia Apennines are affected by widespread landsliding, often consisting of slow, deep-seated movements. Recurrent acceleration of these landslides causes damage to buildings and infrastructures, severely biasing the socio-economic development of the region. Most landslides in the area of study occur within clayey units of turbiditic flysch formations, often severely disturbed by tectonic thrust and previous landsliding. The Faeto Flysch (FAE) is one of the most widespread turbiditic formations in the Daunia Apennines and is representative of the tectonised geological formations involved in slope failure. This work, by examining the landslide processes occurring at four pilot sites, aims at connecting the observed mechanisms to the geo-hydro-mechanical setup of FAE in the slopes. It is found that the soil portion of FAE consists of highly plastic clays, resulting in low intrinsic shear strength, and hence controls the initiation and progression of failure in the slopes, as such representing an internal predisposing factor to landsliding. In addition, the presence of fractured rock strata confers a high permeability at the slope scale, with respect to that of the soil matrix. This results in severe piezometric levels in the slope, which represent another internal predisposing factor to failure, and in the ability to induce significant seasonal pore water pressure oscillations down to great depths, connected to rainfall infiltration, thus triggering the recurrent acceleration of the landslides.

scholarly journals Characteristics and Distribution of Landslides in the Populated Hillslopes of Bujumbura, Burundi

Geosciences ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 259
Author(s):  
Désiré Kubwimana ◽  
Lahsen Ait Brahim ◽  
Pascal Nkurunziza ◽  
Antoine Dille ◽  
Arthur Depicker ◽  
...  
Keyword(s):  
Risk Reduction ◽  
Disaster Risk Reduction ◽  
Slope Failure ◽  
Visual Analysis ◽  
Disaster Risk ◽  
Aerial Photographs ◽  
Mountainous Regions ◽  
Reduction Strategies ◽  
Landslide Processes ◽  
Risk Reduction Strategies

Accurate and detailed multitemporal inventories of landslides and their process characterization are crucial for the evaluation of landslide hazards and the implementation of disaster risk reduction strategies in densely-populated mountainous regions. Such investigations are, however, rare in many regions of the tropical African highlands, where landslide research is often in its infancy and not adapted to the local needs. Here, we have produced a comprehensive multitemporal investigation of the landslide processes in the hillslopes of Bujumbura, situated in the landslide-prone East African Rift. We inventoried more than 1200 landslides by combining careful field investigation and visual analysis of satellite images, very-high-resolution topographic data, and historical aerial photographs. More than 20% of the hillslopes of the city are affected by landslides. Recent landslides (post-1950s) are mostly shallow, triggered by rainfall, and located on the steepest slopes. The presence of roads and river quarrying can also control their occurrence. Deep-seated landslides typically concentrate in landscapes that have been rejuvenated through knickpoint retreat. The difference in size distributions between old and recent deep-seated landslides suggests the long-term influence of potentially changing slope-failure drivers. Of the deep-seated landslides, 66% are currently active, those being mostly earthflows connected to the river system. Gully systems causing landslides are commonly associated with the urbanization of the hillslopes. Our results provide a much more accurate record of landslide processes and their impacts in the region than was previously available. These insights will be useful for land management and disaster risk reduction strategies.

Long-term geophysical-geotechnical monitoring of landslide processes

2020 ◽  
Author(s):  
Jon Chambers ◽  
Keyword(s):  
Slope Stability ◽  
Slope Failure ◽  
Time Lapse ◽  
Early Warning Systems ◽  
Substantial Contribution ◽  
Data Sets ◽  
Geophysical Monitoring ◽  
Geotechnical Monitoring ◽  
Time Estimates ◽  
Landslide Processes

<p>We assess the use of novel geophysical monitoring approaches to spatially characterise geotechnical properties and processes driving slope failure, and consider the contribution of geophysical technologies to the development of slope-scale early warning systems (EWS). In particular, we focus on geoelectrical monitoring approaches to image moisture driven processes, supported by the use of shallow seismic surveys to illuminate elastic property distributions and changes. We describe an approach for using spatial and volumetric geophysical models of slope structures and processes to better inform geotechnical models of slope stability and estimates of factor of safety.</p><p>Key components of the approach have included: automated schemes and instrumentation for measuring and processing field-scale time-lapse geophysical and geotechnical data sets; laboratory based assessments of geophysical-geotechnical property relationships (e.g. between resistivity, moisture content and pore suctions) to aid the interpretation of slope-scale geophysical models; and linked geophysical-geomechanical modelling to provide near-real-time estimates of slope stability to aid forecasting of landslide events. Our approach is illustrated with results from a range of field sites located on natural and engineered slopes. We conclude that the spatially rich subsurface information provided by geophysical monitoring can make a substantial contribution to landslide EWS and can provide an improved understanding of the condition of unstable slopes.</p>

Computer analysis of side-band holography in STEM

1991 ◽  
Vol 49 ◽  
pp. 684-685
Author(s):  
M.A. Gribelyuk ◽  
J.M. Cowley
Keyword(s):  
Interference Pattern ◽  
Computer Analysis ◽  
Side Band ◽  
Diffraction Plane ◽  
Illumination System ◽  
Probe Size

Recently the use of a biprism in a STEM instrument has been suggested for recording of a hologram. A biprism is inserted in the illumination system and creates two coherent focussed beams at the specimen level with a probe size d= 5-10Å. If one beam passes through an object and another one passes in vacuum, an interference pattern, i.e. a hologram can be observed in diffraction plane (Fig.1).

Biotelemetry and Computer Analysis of Electrocardiograms

1969 ◽  
Vol 08 (03) ◽  
pp. 120-127 ◽  
Author(s):  
P. R. Amlinger
Keyword(s):  
Computer Analysis ◽  
Rural Areas ◽  
Applied Research ◽  
Research Effort ◽  
Pilot Project ◽  
Modern Medicine ◽  
Modern Technology ◽  
Long Distance ◽  
Regional Medical ◽  
Medical Program

Routine transmission of electrocardiograms and their computer interpretation via long-distance telephone lines has been proven feasible in the Automated Electrocardiogram Project of the Missouri Regional Medical Program. Though this Pilot Project — the first on a state-wide basis — is still viewed as an applied research effort rather than a service, such biotelemetry is rapidly gaining acceptance as a medium to bring modern medicine, through modern technology, to urban and remote rural areas as well, where it is most needed.The computer executes all the wave measuraments and calculations with incredible speed. It takes over a most boring, repetitive part of the physician’s work. However, it can only follow the instructions of the diagnostic program, compiled by expert cardiologists. Thus, it is an ever-ready, never-tiring servant for the physician and his patients.

Fabrication of a Slope Failure Prediction Sensor using Miniaturized EC Sensor

2013 ◽  
Vol 133 (9) ◽  
pp. 278-283 ◽  
Author(s):  
Masato Futagawa ◽  
Mitsuru Komatsu ◽  
Hikofumi Suzuki ◽  
Yuji Takeshita ◽  
Yasushi Fuwa ◽  
...  
Keyword(s):  
Slope Failure ◽  
Failure Prediction
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