In this guideline, an approach to consider forest structure and characteristics along a rockfall trajectory guideline is presented to determine key parameters, which help to evaluate the protective role of forests stands against rock-fall events. Therefore, this work should be seen as extension to “Guidelines for collecting data about past rockfall events” (ASP 462 – RockTheAlps; WP1 – Activity A. T1.2) proposed by Žabota & Kobal (2017). In this concept, the approach and the survey setup for a comprehensive rockfall hazard event documentation, focusing on woody vegetation, are illustrated. The main forest parameters are explained and in a “best practice example”, the general workflow and some exceptional cases are discussed.
