The diploma thesis deals with the erodibility of the Slovenian coastline, which is characterised by cliffs built of siliciclastic flysch rocks. 17 hazard maps were produced, based on four different methods: the Original RG method, the Modified RG method, the Abbreviated RG method, the CVI, the CVI-Croatian version and the "Campania" method. The Modified RG Method and the Shortened RG Method are derived from the Original RG Method. The coastline was divided into 30 sections. Each of them was assigned a rockfall hazard level using the methods listed above. The indices of each section were grouped into four or five classes, where the first class represents the lowest and the fourth and fifth classes represent the highest hazard, respectively. The results are presented on maps where each class is marked with a different colour: the green colours represent the first and second class sections, the third class is coloured yellow, the fourth orange, and the fifth red. The third class does not appear in all methods, but we have added it to all methods at the end, in the Results Comparisons section, to facilitate comparison. The main aim was to compare the results and see which method gives the most accurate results. We found that the results of the surveys differed widely. In the end, we came to the conclusion that the "Campania" method is the most suitable, as it has the most correctly distributed sections, i.e. it has the most red and orange coloured sections in locations 7–8, 14–22 and 25–30.
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