Suchergebnisse

Abstract. Historical rockfall catalogues are important data sources for the investigation of the temporal occurrence of rockfalls, which is crucial
information for rockfall hazard and risk assessments. However, such catalogues are rare and often incomplete. Here, we selected and analysed
seven catalogues of historical rockfalls in Austria, Italy, and the USA to
highlight existing relationships between data collection and mapping methods and representativeness of the resulting rockfall records. Heuristic and simple statistically based frequency analysis methods are applied to describe and compare the different historical rockfall catalogues. Our
results show that the mapping strategy may affect the frequency of the assessed rockfall occurrence and the completeness and representativeness of the related time series of historical rockfalls. We conclude by presenting the advantages and limitations of the application of different frequency-based methods for analysing rockfall catalogues and providing recommendations for rockfall mapping. We furthermore present non-parametric statistical methods for dealing with typically small rockfall datasets, which are particularly suited for the characterization of basic rockfall catalogues. Such recommendations should help in the definition of standards for collecting and using temporal rockfall data in hazard and risk assessments.

Abstract. In the eastern Alps, no previous research focused on the impact of wildfires
on the occurrence of rockfalls. The investigation of wildfires and
post-wildfire rockfalls gains new importance with respect to changes in
weather extremes and rapid social developments such as population growth
and tourism. The present work describes a wildfire that occurred in August
2018 in a famous world heritage site in Austria. Indicators of fire severity
and rockfall occurrence during and after the fire are described.