GIS-Based Rockfall Susceptibility Zoning in Greece

Saroglou, Charalampos

doi:10.3390/geosciences9040163

Cited by 21 publications

(19 citation statements)

References 51 publications

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“…Rockfalls can be triggered by a large variety of natural processes, such as rainfall, cycling thermal stress, seismic activity, etc. [130][131][132][133]. Nevertheless, there is a lack of literature about the influence of wildfires on rockfall activity.…”

Section: Discussionmentioning

confidence: 99%

Effects of Wildfire on Rockfall Occurrence: A Review through Actual Cases in Spain

et al. 2021

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Understanding processes and conditions that lead to rockfalls during and after a wildfire in different geological contexts is crucial since this phenomenon is one of the major hazards in mountainous regions across Europe. Spain is one of the European countries with the highest rate of wildfires, and rockfalls cause high economic and social impact, with many fatalities every year. The increase of rockfalls during and after wildfires is connected with the merging of different factors, not only in the detached area but also in the propagation and potentially affected area. When wildfire occurred, many actions take place: changes in the mechanical conditions of the rocks, the loss of protective capacity from vegetation, the effect induced by firefighting activities and/or the impact by the high temperatures in the adopted protective measures. After the wildfire, there is an increase in frequency and intensity of rockfalls in the burned area, causing a major impact of rockfalls on not only road networks and built-up areas but also people living. Additionally, the removal of vegetation by wildfires causes an increase in the risk perception, related not only to detached blocks but also to the general appearance of the rock mass. In this review, the main factors that influence the occurrence of rockfalls after a wildfire are analyzed, and three actual case studies in Spain are presented to support the variety of conclusions obtained.

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Section: Discussionmentioning

confidence: 99%

Effects of Wildfire on Rockfall Occurrence: A Review through Actual Cases in Spain

et al. 2021

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“…What we have shown is just a glimpse of what can be done with the collected rockfall data. The other possible applications could for example studying of rockfall triggering mechanisms and temporal occurrence [32,34,[64][65][66][67][68], magnitude-frequency of the events [7,8,15,17,20], lithological characteristics [32,[69][70][71], studying the protection effect of forest against rockfalls [72][73][74][75], rockfall distribution at different elevations [32,64], influence of climate change on rockfall activity [64,67,76] etc.…”

Section: Discussionmentioning

confidence: 99%

A New Methodology for Mapping Past Rockfall Events: From Mobile Crowdsourcing to Rockfall Simulation Validation

Žabota

Kobal

2020

IJGI

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Rockfalls are one of the most common natural hazards in mountainous areas that pose high risk to people and their activities. Rockfall risk assessment is commonly performed with the use of models that can simulate the potential rockfall source, propagation and runout areas. The quality of the models can be improved by collecting data on past rockfall events. Mobile crowdsourcing is becoming a common approach for collecting field data by using smartphones, the main advantages of which are the use of a harmonised protocol, and the possibility of creating large datasets due to the simultaneous use by multiple users. This paper presents a new methodology for collecting past rockfall events with a mobile application, where the locations and attributes of rockfall source areas and rockfall deposits are collected, and the data are stored in an online database which can be accessed via the WebGIS platform. The methodology also presents an approach for calculating an actual source location based on viewshed analysis which greatly reduces the problem of field mapping of inaccessible source areas. Additionally, we present a rockfall database in the Alpine Space that has been created by the presented methodology, and an application of collected data for the calibration and validation of two rockfall models (CONEFALL and Rockyfor3D).

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“…In total, 105 completed questionnaires were returned out of the 413 that were originally sent (response rate of 25.4%). The participants were from municipal (49), regional (17) and national authorities (39). Although the resulting sample size is deemed adequate compared with other surveys addressed to experts (e.g., Flyn et al [53]; Darko et al [54]), it should be noted that there are limitations to the survey, that is, we can capture certain views and perceptions relating to certain respondents' attributes and characteristics, such as experience, age and qualifications.…”

Section: Respondents' Profilementioning

confidence: 99%

“…This can be particularly important in areas of the world, where the presence of a diversity of natural hazards tests the capacity of organizations. Eastern Mediterranean and Greece, in particular, is a region where catastrophic disasters of different kinds, including forest fires [44], floods [45], earthquakes [46], volcanos [47], landslides [48,49], and others occur in a small geographic area.…”

Section: Introductionmentioning

confidence: 99%

Identification of Patterns and Influential Factors on Civil Protection Personnel Opinions and Views on Different Aspects of Flood Risk Management: The Case of Greece

2020

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The views and perceptions of the civil protection community have a central position in any risk management process or initiative, and are crucial to its success. However, knowledge of the views and perceptions of officials, and what affects them remains limited in the current literature. This work uses questionnaires to explore the views of civil protection personnel in Greece on different elements of flood risk management and identify factors that influence them. Results provide a basic understanding of officials’ views, indicating certain shortcomings in various sectors and dissatisfaction in several aspects of everyday practice. Interestingly, responses of participants to perception- and knowledge-related questions show a pattern, relating to respondents’ attributes and characteristics, such as experience, age, qualifications, and others. On the contrary, their views on everyday practice issues of flood risk management are associated with the type of position they have in the civil protection community. The findings contribute to the overall effort to improve the understanding of the characteristics of civil protection organizations across Europe, as a means to enhance cooperation.

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GIS-Based Rockfall Susceptibility Zoning in Greece

Cited by 21 publications

References 51 publications

Effects of Wildfire on Rockfall Occurrence: A Review through Actual Cases in Spain

Effects of Wildfire on Rockfall Occurrence: A Review through Actual Cases in Spain

A New Methodology for Mapping Past Rockfall Events: From Mobile Crowdsourcing to Rockfall Simulation Validation

Identification of Patterns and Influential Factors on Civil Protection Personnel Opinions and Views on Different Aspects of Flood Risk Management: The Case of Greece

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