Table 4 Validity of RHZ map with the selected spot areas

From: GIS-based rockfall hazard zones modeling along the coastal Gulf of Aqaba Region, Egypt

  Risk Area Area (Km2) Area(%) Rockfall frequency (RFF) Rockfall density (RFF/km2) Confidence rate (%)
Area 1 Low * * * * *
Moderate 6,81432 59,20 8 1,17 40
High 4,687744 40,80 12 2,55 60
Total 11,502064 100 20 3,72 100
Area 2 Low * * * * *
Moderate 4,34128 36 9 2,073 45
High 7,689184 64 11 1,43 55
Total 12,030464 100 20 3,503 100
Area 3 Low 0,137664 1,00 * * *
Moderate 6,406128 54,00 8 1,248 40
High 5,39928 45,00 12 2,225 60
Total 11,943072 100 20 3,325 100
Area 4 Low 1,237104 9,719 * * *
Moderate 8,260608 64,89 6 0,726 30
High 4,46784 25,391 14 3,314 70
Total 12,728448 100 20 1,91 100
Area 5 Low 0,142848 1,00 * * *
Moderate 5,631984 54,00 8 1,42 40
High 4,683888 45,00 12 2,561 60
Total 10,45872 100 20 3,83 100
  1. (*) No data