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Table 18 The summary of rockfall hazard class and the parameters

From: Slope mass rating-based analysis to assess rockfall hazard on Yogyakarta Southern Mountain, Indonesia

Hazard class

Lithology

SMR score

Slope height (m)

Size of rock block (m)

Stations

Very low

Fragmental limestone

51.66–51.75 (normal)

2.85–4.57

0.2–0.3

8, 9

Low

Andesite, crystalline, and fragmental limestones

31.17–53.03 (normal–bad)

3.52–5.28

0.2–0.7

1, 3, 7, 10, 12

Moderate

Crystalline, fragmental, and reefal limestones

5.82–38.15 (bad–very bad)

4.26–8. 96

0. 3–1.0

4, 5, 11, 14, 15, 16, 17

High

Crystalline and reefal limestones

18.31–36.50 (bad–very bad)

3.62–7.82

0.7–1.3

2, 6, 13