GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles  (307)
  • 2010-2014  (307)
Document type
  • Articles  (307)
Source
Publisher
Years
Year
Journal
Topic
  • 1
    facet.materialart.
    Unknown
    Landslide detection and monitoring capability of boat-based mobile laser scanning along Dieppe coastal cliffs, Normandy (2014)
    Springer
    Details
    Publication Date: 2014-12-07
    Description: Integrated in a wide research assessing destabilizing and triggering factors to model cliff dynamic along the Dieppe’s shoreline in High Normandy, this study aims at testing boat-based mobile LiDAR capabilities by scanning 3D point clouds of the unstable coastal cliffs. Two acquisition campaigns were performed in September 2012 and September 2013, scanning (1) a 30-km-long shoreline and (2) the same test cliffs in different environmental conditions and device settings. The potentials of collected data for 3D modelling, change detection and landslide monitoring were afterward assessed. By scanning during favourable meteorological and marine conditions and close to the coast, mobile LiDAR devices are able to quickly scan a long shoreline with median point spacing up to 10 cm. The acquired data are then sufficiently detailed to map geomorphological features smaller than 0.5 m 2 . Furthermore, our capability to detect rockfalls and erosion deposits (〉m 3 ) is confirmed, since using the classical approach of computing differences between sequential acquisitions reveals many cliff collapses between Pourville and Quiberville and only sparse changes between Dieppe and Belleville-sur-Mer. These different change rates result from different rockfall susceptibilities. Finally, we also confirmed the capability of the boat-based mobile LiDAR technique to monitor single large changes, characterizing the Dieppe landslide geometry with two main active scarps, retrogression up to 40 m and about 100,000 m 3 of eroded materials.
    Print ISSN: 1612-510X
    Electronic ISSN: 1612-5118
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Published by Springer
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    facet.materialart.
    Unknown
    The formation and development of debris flows in large watersheds after the 2008 Wenchuan Earthquake (2014)
    Springer
    Details
    Publication Date: 2014-12-04
    Description: The Wenchuan earthquake has caused abundance of loose materials supplies for debris flows. Many debris flows have occurred in watersheds in area beyond 20 km 2 , presenting characteristics differing from those in small watersheds. The debris flows yearly frequency decreases exponentially, and the average debris flow magnitude increases linearly with watershed size. The rainfall thresholds for debris flows in large watersheds were expressed as I  = 14.7 D −0.79 (2 h 〈  D  〈 56 h), which is considerably higher than those in small watersheds as I  = 4.4 D −0.70 (2 h 〈  D  〈 37 h). A case study is conducted in Ergou, 39.4 km 2 in area, to illustrate the formation and development processes of debris flows in large watersheds. A debris flow develops in a large watershed only when the rainfall was high enough to trigger the wide-spread failures and erosions on slope and realize the confluence in the watershed. The debris flow was supplied by the widely distributed failures dominated by rill erosions (14 in 22 sources in this case). The intermittent supplying increased the size and duration of debris flow. While the landslide dam failures provided most amounts for debris flows (57 % of the total amount), and amplified the discharge suddenly. During these processes, the debris flow velocity and density increased as well. The similar processes were observed in other large watersheds, indicating this case is representative.
    Print ISSN: 1612-510X
    Electronic ISSN: 1612-5118
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Published by Springer
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 3
    facet.materialart.
    Unknown
    Landslides triggered by the June 2013 extreme rainfall event in parts of Uttarakhand state, India (2014)
    Springer
    Details
    Publication Date: 2014-11-25
    Description: Extreme rainfall during 15–17 of June 2013 triggered numerous landslides and caused widespread damage and loss of life in the Bhagirathi and Alaknanda river valleys, with Kedarnath town bearing the brunt of the disaster. In this paper, we present a corroboration of observations gathered from very high resolution satellite data which indicated that two events in close succession caused damage to the Kedarnath town. While the flooding on June 16, 2013 was due to the reactivation of an old landslide that resulted in breaching of the river training wall, breaching of the moraine dammed Chorabari lake on June 17, 2013 caused further flooding and damage to the Kedarnath town. We also prepared a detailed landslide inventory using multi-temporal Resourcesat-2 images (5.8 m) acquired before and after the event in order to avoid issues related to cloud and shadow. A total of 6,013 landslides were mapped, out of which 3,472 landslides with 30.4 km 2 area were classified as new ones, 1,137 landslides with 9.1 km 2 area were classified as old ones and 1,401 landslides with 11.7 km 2 area were classified as reactivated ones. The frequency-area statistics of the mapped landslides shows near completeness of this event-based landslide inventory. The debris brought down by rivers from these landslides, particularly from the glaciated deposits in upstream areas, caused severe river bank erosion in downstream areas.
    Print ISSN: 1612-510X
    Electronic ISSN: 1612-5118
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Published by Springer
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 4
    facet.materialart.
    Unknown
    Debris flows in the Andean ranges of central Chile and Argentina triggered by 2013 summer storms: characteristics and consequences (2014)
    Springer
    Details
    Publication Date: 2014-11-21
    Description: In January and February 2013, heavy rainfall during local summer storms triggered a large number of landslides in the Andes Main and Frontal ranges of central Chile and Argentina (32°–34° S). Most of the mass movements classify as debris flows, while rockfalls and debris avalanches also occurred. The major debris flows occurred in the Maipo and Aconcagua valleys (Chile) and along the Mendoza River valley (Argentina). The debris flows caused serious disruption to the international highway connecting both countries and local roads and produced a large impact on the population of major cities downstream, mainly due to potable water supply cutoffs. Debris flow deposits have silt and clay particles usually ranging between 10 and 20 % by weight, which favors the movement of viscous flows in short, steep lateral gullies. Most of the flows tended to channelize, and the materials were deposited in alluvial fans and cones in areas with previous records of such events. This indicates that they constitute a significant hazard that may not have been properly considered in road infrastructure and potable water supply strategies for the region. This potential hazard may become more serious due to climate change in the near future.
    Print ISSN: 1612-510X
    Electronic ISSN: 1612-5118
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Published by Springer
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 5
    facet.materialart.
    Unknown
    Assessment of rainfall-generated shallow landslide/debris-flow susceptibility and runout using a GIS-based approach: application to western Southern Alps of New Zealand (2014)
    Springer
    Details
    Publication Date: 2014-11-19
    Description: Rainfall-triggered shallow slope failures are very common in the western Southern Alps of New Zealand, causing widespread damage to property and infrastructure, injury and loss of life. This study develops a geographic information system (GIS)-based approach for shallow landslide/debris-flow susceptibility assessment. Since landslides are complex and their prediction involves many uncertainties, fuzzy logic is used to deal with uncertainties inherent in spatial analysis and limited knowledge on the relationship between conditioning factors and slope instability. A landslide inventory was compiled using data from existing catalogues, satellite imagery and field observations. Ten parameters were initially identified as the most important conditioning factors for rainfall-generated slope failures in the study area, and fuzzy memberships were established between each parameter and landslide occurrence based on both the landslide inventory and user-defined functions. Three output landslide susceptibility maps were developed and evaluated in a test area using an independent population of landslides. The models demonstrated satisfactory performance with area under the curve (AUC) varying from 0.708 to 0.727. Sensitivity analyses showed that a six-parameter model using slope angle, lithology, slope aspect, proximity to faults, soil induration, and proximity to drainage network had the highest predictive performance (AUC = 0.734). The runout path and distance of potential future landslides from the susceptible areas were also modelled based on a multiple flow direction algorithm and the topographic slope of existing debris-flow deposits. The final susceptibility map has the potential to inform regional-scale land-use planning and to prioritize areas where hazard mitigation measures are required.
    Print ISSN: 1612-510X
    Electronic ISSN: 1612-5118
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Published by Springer
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 6
    facet.materialart.
    Unknown
    Patterns of movement in the Ventnor landslide complex, Isle of Wight, southern England (2014)
    Springer
    Details
    Publication Date: 2014-11-16
    Description: The patterns of ground movement were monitored within a large, deep-seated landslide complex at Ventnor in southern England, between May 1998 and June 2002 using automated crackmeters, settlement cells and vibrating wire piezometers. It was found that the landslide maintains a state of marginal instability, such that it is subject to continual very slow deformation. Movement is primarily on a low-angled basal shear surface at 〉90 m depth. The movement record shows a series of distinct deformation patterns that vary as groundwater conditions change. Continuous slow deformation occurs across the landslide complex at rates of between 5 and 10 mm/year. The background pattern of movement does not appear to correlate with local porewater pressure. Periods of more rapid movement (reaching up to c. 34 mm/year during the monitoring period) were associated with a period of elevated groundwater, although the relationship between movement rate and porewater pressure was complex. The patterns of movement and the landslide geometry suggest that the likelihood of a rapid, catastrophic failure is low. Future episodes of faster movement are likely during periods when porewater pressures at the basal shear surface are elevated above a critical threshold. Whilst the resulting surface deformation damages the town, it is unlikely to occur rapidly without significant changes to the landslide hydrogeology or the stress state within the landslide.
    Print ISSN: 1612-510X
    Electronic ISSN: 1612-5118
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Published by Springer
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 7
    facet.materialart.
    Unknown
    FEM and LEM stability analyses of the fatal landslides at Çöllolar open-cast lignite mine in Elbistan, Turkey (2014)
    Springer
    Details
    Publication Date: 2014-11-16
    Description: On February 2011, two landslides took place in Çöllolar the lignite mine within 1 week. The first landslide, which occurred at the permanent slopes located in the southwest of the pit, resulted in one fatality and temporary cessation of production activities. Four days later, a second landslide, larger than the first, occurred in the temporary production slopes (northeast of the same pit). The second landslide, with a volume of about 50 Mm 3 soil, resulted in ten fatalities including geological and mining engineers. In the present study, a series of numerical analyses were carried out using the finite element method and the limit equilibrium method to evaluate factors that caused the landslides. Three different depths were considered for the level of ground water table. The safety factors in the permanent slopes were found to be around one or less even if the level of groundwater table was relatively low. It was concluded that the first landslide at the permanent slopes happened possibly due to the high level of water table which was continuously fed by the Hurman River. On the other hand, despite relatively higher safety factors, the failure of the production slopes was triggered probably due to instability introduced by the first landslide.
    Print ISSN: 1612-510X
    Electronic ISSN: 1612-5118
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Published by Springer
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 8
    facet.materialart.
    Unknown
    Reconstruction of the history of the Palliser Rockslide based on 36 Cl terrestrial cosmogenic nuclide dating and debris volume estimations (2014)
    Springer
    Details
    Publication Date: 2014-11-15
    Description: This paper presents the results of a combined study, using cosmogenic 36 Cl exposure dating and terrestrial digital photogrammetry of the Palliser Rockslide located in the southeastern Canadian Rocky Mountains. This site is particularly well-suited to demonstrate how this multi-disciplinary approach can be used to differentiate distinct rocksliding events, estimate their volume, and establish their chronology and recurrence interval. Observations suggest that rocksliding has been ongoing since the late Pleistocene deglaciation. Two major rockslide events have been dated at 10.0 ± 1.2 kyr and 7.7 ± 0.8 kyr before present, with failure volumes of 40 and 8 Mm 3 , respectively. The results have important implications concerning our understanding of the temporal distribution of paraglacial rockslides and rock avalanches; they provide a better understanding of the volumes and failure mechanisms of recurrent failure events; and they represent the first absolute ages of a prehistoric high-magnitude event in the Canadian Rocky Mountains.
    Print ISSN: 1612-510X
    Electronic ISSN: 1612-5118
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Published by Springer
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 9
    facet.materialart.
    Unknown
    Laboratory experiments of water pressure loads acting on a downstream dam caused by ice avalanches (2014)
    Springer
    Details
    Publication Date: 2014-11-06
    Description: A worldwide decline of mountain glaciers is occurring due to the impacts from climate warming. The retreat of mountain glaciers often leads to different kinds of geo-hazards. Serious surges triggered by glacier avalanches often pose a potential threat to the stability of dams. In this article, four different types of blocks with a constant density of about 900 kg/m 3 were used to simulate the glacier avalanches in natural conditions. By considering the raw material properties of the plate and blocks themselves, the plunging velocity of a block was calculated by a theoretical method instead of by video cameras. The effect of the slope angle, distance between the sliding block and the water surface, initial water depth, slide Froude number, geometry, and distance between the plunging point of the sliding blocks and the downstream dam was considered to study the characteristics of the pressure loads acting on the moraine dam. In addition, an empirical equation was obtained to predict the maximum pressure load acting on the dam. Pressure load on the glacier dam is only one of the crucial factors for dam safety analyses. The failure process of a moraine dam, the probable maximum discharge of outburst floods, and the transportation of sediments along the downstream valley should also be considered in future studies.
    Print ISSN: 1612-510X
    Electronic ISSN: 1612-5118
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Published by Springer
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 10
    facet.materialart.
    Unknown
    Landslide susceptibility mapping using multi-criteria evaluation techniques in Chittagong Metropolitan Area, Bangladesh (2014)
    Springer
    Details
    Publication Date: 2014-11-06
    Description: Landslides are a common hazard in the highly urbanized hilly areas in Chittagong Metropolitan Area (CMA), Bangladesh. The main cause of the landslides is torrential rain in short period of time. This area experiences several landslides each year, resulting in casualties, property damage, and economic loss. Therefore, the primary objective of this research is to produce the Landslide Susceptibility Maps for CMA so that appropriate landslide disaster risk reduction strategies can be developed. In this research, three different Geographic Information System-based Multi-Criteria Decision Analysis methods—the Artificial Hierarchy Process (AHP), Weighted Linear Combination (WLC), and Ordered Weighted Average (OWA)—were applied to scientifically assess the landslide susceptible areas in CMA. Nine different thematic layers or landslide causative factors were considered. Then, seven different landslide susceptible scenarios were generated based on the three weighted overlay techniques. Later, the performances of the methods were validated using the area under the relative operating characteristic curves. The accuracies of the landslide susceptibility maps produced by the AHP, WLC_1, WLC_2, WLC_3, OWA_1, OWA_2, and OWA_3 methods were found as 89.80, 83.90, 91.10, 88.50, 90.40, 95.10, and 87.10 %, respectively. The verification results showed satisfactory agreement between the susceptibility maps produced and the existing data on the 20 historical landslide locations.
    Print ISSN: 1612-510X
    Electronic ISSN: 1612-5118
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Published by Springer
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...