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Author(s):	Bollinger, Daniel; Gruner, Ueli; Jordan, Peter; Liniger, Markus; Rovina, Hermann
Title:	Various methods, different results - on dealing with rockfall modelling in hazard and risk analyses / Verschiedene Verfahren, verschiedene Resultate - Vom Umgang mit Sturzmodellierungen bei Gefahren- und Risikoanalysen
Abstract:	Numerical modelling of rockfall events is an increasingly significant basis for the production of hazard maps and the design of protection structures. The fact that the various programs on the market lead to different results in specific cases has led to discussion. The programs most commonly used in Switzerland are therefore compared with regard to input parameters and results, the main and auxiliary algorithms and further aspects. The difference between deterministic and probabilistic methods is important. The probabilistic method requires great caution and experience, both in the parameter input and in the interpretation of the results. This poses the general question, what uncertainties have to be dealt with in the management of natural hazards. Numerische Modellierungen von Steinschlagereignissen stellen eine zunehmend bedeutendere Grundlage für die Erstellung von Gefahrenkarten und die Bemessung von Schutzbauten dar. Dass die verschiedenen marktüblichen Programme bei konkreten Fragestellungen zu unterschiedlichen Resultaten führen, hat zu Diskussionen geführt. Die in der Schweiz am häufigsten eingesetzten Programme werden deshalb betreffend der Eingabeparameter und Resultate, der zugrunde liegenden Haupt- und Zusatzalgorithmen und weiterer Aspekte verglichen. Wichtig ist die Unterscheidung zwischen deterministischem und probabilistischem Ansatz. Der probabilistische Ansatz bedarf sowohl bei der Parametereingabe als auch bei der Interpretation der Resultate größter Sorgfalt und Erfahrung. Dabei stellt sich auch die generelle Frage, wie mit Unsicherheiten im Naturgefahrenmanagement umzugehen ist.
Source:	Geomechanics and Tunnelling 5 (2012), No. 4
Page/s:	347-354
Language of Publication:	English/German

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