Long term ground displacements due to a large landslide in western Greece

2018 ◽  
pp. 1177-1181
Author(s):  
K. Kavoura ◽  
N. Sabatakakis ◽  
G. Tsiambaos
Keyword(s):  
Large Landslide ◽  
Western Greece ◽  
Ground Displacements

scholarly journals Unstable rock slope hydrogeology: insights from the large-scale study of western Argentera-Mercantour hillslopes (South-East France)

2007 ◽  
Vol 178 (2) ◽  
pp. 159-168 ◽  
Author(s):  
Stéphane Binet ◽  
Yves Guglielmi ◽  
Catherine Bertrandet ◽  
Jacques Mudry
Keyword(s):  
Flow Velocity ◽  
Large Scale ◽  
Rock Slope ◽  
Fractured Rock ◽  
Gravitational Instabilities ◽  
Large Landslide ◽  
Hydrogeological Mapping ◽  
Lower Variation ◽  
Natural Spring

Abstract Inventory of unstable hillslopes, hydrogeological mapping and hydrochemical characteristics of natural spring waters were used to determine the long-term relationships between groundwater and gravitational instabilities in the Upper Tinée Valley (South-East French Alps). Water chemistry and flow records allow to propose a conceptual model of water flow within unstable rocky slopes and to back-calculate the volume of infiltrated water and the flow velocity in the aquifers for different deformation states of the slopes. An increase in infiltrated yield, flow velocity and porosity is observed and linked to collapsed and toppled structures in the upper parts of the hillslopes. In these areas, perched aquifers take place in the reworked media. When a large landslide occurs, it modifies the geometry of the slope and bypasses the perched flows down to the foot of the slope. With long-term continuous slope deformation, the associated effect between water flows and slope destabilization changes. In the fractured rock, the coupled effect corresponds to rising water pressures with limited volumes of infiltrated water; in the more fractured and permeable collapsed and toppled areas, the volumes of infiltrated water increase with a lower variation of water pressures.

scholarly journals KINEMATIC ANALYSIS EVOLUTION OF EXTENDED LANDSLIDES: TWO CASE STUDIES FROM WESTERN GREECE

2017 ◽  
Vol 50 (2) ◽  
pp. 730
Author(s):  
K. Kavoura ◽  
S. Anagnostopoulou ◽  
K. Servou ◽  
N. Depoundis ◽  
K. Nikolakopoulos ◽  
...  
Keyword(s):  
Statistical Model ◽  
Temporal Evolution ◽  
Data Normalization ◽  
Time Period ◽  
Long Time ◽  
Triggering Factor ◽  
The Common ◽  
Western Greece ◽  
Heavy Rainfalls

Two of the most well known historical landslide occurrences are analyzed and their temporal evolution is presented. The sites of Panagopoula and Karya are often referred as the most representative cases of long term ground displacements based on inclinometer monitoring data. Regarding these cases, the heavy rainfalls constitute the main controlling (triggering) factor, while flysch is the critical landslide-prone formation which significantly contributes to landsliding. The inclinometer data through a long time period were analyzed and typical movement diagrams were compiled. A simple statistical model including data normalization through several active stages (phases) of movement is used to identify the common kinematic features as well as to estimate the velocity trend type of movement.

Long-Term Oxygen Therapy in Chronic Obstructive Pulmonary Disease: The Use of Concentrators and Liquid Oxygen Systems in North-Western Greece

Respiration ◽  
2006 ◽  
Vol 73 (6) ◽  
pp. 777-782 ◽  
Author(s):  
Stamatis Katsenos ◽  
Alexandros Charisis ◽  
Georgios Daskalopoulos ◽  
Stavros H. Constantopoulos ◽  
Miltiadis P. Vassiliou
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Pulmonary Disease ◽  
Oxygen Therapy ◽  
Liquid Oxygen ◽  
Chronic Obstructive ◽  
Obstructive Pulmonary Disease ◽  
Long Term Oxygen Therapy ◽  
North Western ◽  
Western Greece

scholarly journals Impact of human activities and infrastructure works on hydro morphological characteristics of Alfeios River, Greece

2013 ◽  
Vol 16 (1) ◽  
pp. 136-145
Keyword(s):  
Power Plant ◽  
Adverse Effects ◽  
Electric Power ◽  
Flow Rate ◽  
Human Activities ◽  
Morphological Characteristics ◽  
The Past ◽  
Western Greece ◽  
Long Term Adverse Effects

<p>The Alfeios River is the greatest in length and flow-rate river in Peloponnisos and constitutes an important water resource and ecosystem of Western Greece. A number of infrastructure works and human activities have been constructed and are operating in Alfeios River Basin, while in the past extensive gravel extraction occurred. The impacts of infrastructure works and gravel extraction mainly in the Lower Alfeios Basin on the hydromorphological river characteristics are described and analyzed. Increased conductivity values were observed at the position close to the steam electric power plant due to the discharge of wastewater. The results show that gravel extraction and infrastructure works, in conjunction with the reduced sediment transport rates, cause long-term adverse effects on riverbed erosion as well as on the water level.</p>

Vertical ground displacements in the Shandong Province derived from long-term GNSS and leveling surveying

2019 ◽  
Vol 64 (7) ◽  
pp. 1388-1397 ◽  
Author(s):  
Chunxi Guo ◽  
Jianliang Nie ◽  
Jie Tian ◽  
Wenli Wang ◽  
Chuanlu Cheng ◽  
...  
Keyword(s):  
Shandong Province ◽  
Vertical Ground ◽  
Ground Displacements

scholarly journals UAV and Structure from Motion Approach to Monitor the Maierato Landslide Evolution

2020 ◽  
Vol 12 (6) ◽  
pp. 1039 ◽  
Author(s):  
Danilo Godone ◽  
Paolo Allasia ◽  
Luigi Borrelli ◽  
Giovanni Gullà
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Structure From Motion ◽  
Three Dimensional ◽  
Monitoring Network ◽  
Residual Risk ◽  
Geotechnical Monitoring ◽  
Large Landslide ◽  
Landslide Evolution ◽  
Mass Displacement

In February 2010 a large landslide affected the Maierato municipality (Calabria, Italy). The landslide, mainly caused by a period of prolonged and intense rainfalls, produced a mass displacement of about 5 million m³ and several damages to farmlands, houses and infrastructures. In the aftermath several conventional monitoring actions were carried out. In the current post emergency phase, the monitoring was resumed by carrying out unmanned aerial vehicles (UAV) flights in order to describe the recent behavior of the landslide and to assess residual risk. Thanks to the potentialities of the structure from motion algorithms and the availability of post emergency reconnaissance photos and a previous 3D dataset, the three-dimensional evolution of the area was computed. Moreover, an experimental multispectral flight was carried out and its results supported the interpretation of local phenomena. The dataset allowed to quantify the elevation losses and raises in several peculiar sectors of the landslide. The obtained results confirm that the UAV monitoring and the structure from motion approach can effectively contribute to manage residual risk in the medium and long term within an integrated geotechnical monitoring network.

scholarly journals MEASUREMENT OF SEAWARD GROUND DISPLACEMENTS ON COASTAL LANDFILL AREA USING RADAR INTERFEROMETRY

2018 ◽  
Vol XLII-3 ◽  
pp. 57-60 ◽  
Author(s):  
W.-K. Baek ◽  
H.-S. Jung
Keyword(s):  
Prediction Models ◽  
Three Dimensional ◽  
Sar Interferometry ◽  
Ground Subsidence ◽  
Line Of Sight ◽  
Industrial Complex ◽  
Map Data ◽  
Spaceborne Radar ◽  
Ground Displacements

In order to understand the mechanism of subsidence and help reducing damage, researchers has been observed the line-of-sight subsidence on the Noksan industrial complex using SAR Interferometry(InSAR) and suggested subsidence prediction models. Although these researches explained a spatially uneven ground subsidence near the seaside, they could not have been explained the occurrence of the newly proposed seaward horizontal, especially nearly north-ward, displacement because of the geometric limitation of InSAR measurements. In this study, we measured the seaward ground displacements trend on the coastal landfill area, Noksan Industrial Complex. We set the interferometric pairs from an ascending and a descending orbits strip map data of ALOS PALSAR2. We employed InSAR and MAI stacking approaches for the both orbits respectively in order to improve the measurement. Finally, seaward deformation was estimated by retrieving three-dimensional displacements from multi-geometric displacements. As a results, maximally 3.3 and 0.7&amp;thinsp;cm/year of ground displacements for the vertical and seaward directions. In further study, we plan to generate InSAR and MAI stacking measurements with additional SAR data to mitigate tropospheric effect and noise well. Such a seaward observation approach using spaceborne radar is expected to be effective in observing the long-term movements on coastal landfill area.

scholarly journals TRIASSIC CARBONATE AND EVAPORITE SEDIMENTATION IN THE IONIAN ZONE (WESTERN GREECE): PALAEOGEOGRAPHIC AND PALAEOCLIMATIC IMPLICATION

2018 ◽  
Vol 36 (2) ◽  
pp. 699 ◽  
Author(s):  
K. Getsos ◽  
F. Pomoni-Papaioannou ◽  
A. Zelilidis
Keyword(s):  
Meteoric Water ◽  
Carbonaceous Material ◽  
Feedback Mechanism ◽  
Storm Events ◽  
Local Climate ◽  
The Impact ◽  
Insolation Forcing ◽  
Climate Responses ◽  
Western Greece

The Triassic is considered a crucial interval because during that time huge areas in our planet suffered an intense, long lasting, period of aridity, which favored the formation of worldwide evaporitic bodies. During the Triassic, great volumes of evaporites were formed in the Ionian basin (Western Greece). On the surface chaotically textured gypsum, surrounded by dolomitic breccias of solution-collapse origin, appears. Sedimentological and diagenetical data proposed that these salt bodies were formed in an intertidal to supratidal environment. Although halite suggests precipitation under long-term arid conditions, clay film intercalations reveal intervals of short term humid conditions. During arid periods sabkhas prevailed and brines were of marine origin. Instead, during humid intervals brines were modified by meteoric water and stormy episodes could be responsible for the transportation of clay-sized material, from the low relief surrounding terrains, into the evaporative basin. Death and burial of cyanobactehal population during storm events could be responsible for the enrichment of clayey layers in carbonaceous material. The co-existence of halite and clays in the Ionian evaporitic sequence imposes a complicated climate, possibly periodically and seasonally controlled. The impact of the precession of the equinoxes plus the palaeogeographical position dominates the local climate. The insolation over the Triassic Ionian basin and nearby sea and land areas is a crucial factor. Climate responses to gradual insolation forcing with an ocean land atmosphere feedback mechanism. The desert / monsoonal dominated climatic model seems to be most proper for the explanation of the existing lithologigal record.

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