Landslide risk mapping                 for the entire Swiss national road network                 Philippe Arnold         ...
Content                                    Introduction                                    Some pictures                ...
Natural hazards    on Swiss    highwaysSwiss Federal Roads Office FEDRO   3
Natural hazards     on Swiss     highwaysSwiss Federal Roads Office FEDRO   4
Natural hazards     on Swiss     highways    Studied Landslides Types                                                     ...
Natural hazards on   Swiss highwaysSwiss Federal Roads Office FEDRO   6
Natural hazards on   Swiss highwaysSwiss Federal Roads Office FEDRO   7
Risk analysis   Damage types                                   • Damage types                                     • (Direc...
hazard analysis (Phase 1)    • intensy maps (INT)    risk analysis (Phase 2)    • on the road and secondary facilities    ...
published at:                www.astra.admin.ch                 Service                         Documents for national r...
Studied natural                 Main process type     Natural hazard    hazards                                   Fall    ...
Occurrence     Probability                   R                   Occurence                  Remarks                       ...
Perimeter Hazard    AssessmentSwiss Federal Roads Office FEDRO   13
≤   Intensy maps (INT)   • Intensity: low, medium, high   • Deposit heights   • How often   • PSpatial Occurence   • Proce...
Perimeter Risk   Analysis                                   Risk calculation                                   Only intens...
How calculate the    FEDRO his risks   Step A   check the intensity maps    and their attributesSwiss Federal Roads Office...
Step B   assign the necessary    attributes to the road axes    (DTV, maximum speed    signalled Vmax, closure    costs)Sw...
Step C   The intensity maps are then    overlaid with the road    axes, after which it is only    the sections of road    ...
Step D   The sections of road    concerned, together with    all hazard processes and    road attributes are    exported a...
Step ESwiss Federal Roads Office FEDRO   20
Swiss Federal Roads Office FEDRO   21
Goal  Swiss-wide risk mapSwiss Federal Roads Office FEDRO   22
Swiss Federal Roads Office FEDRO   23
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Risk concept for natural hazards on motorway in Switzerland

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Philippe ARNOLD



FEDRO, Switzerland

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  • Risk concept for natural hazards on motorway in Switzerland

    1. 1. Landslide risk mapping for the entire Swiss national road network Philippe Arnold Swiss Federal Roads Office (FEDRO) 3003 Bern philippe.arnold@astra.admin.ch Tel. +41 31 323 25 05Swiss Federal Roads Office FEDRO 1
    2. 2. Content  Introduction  Some pictures  FEDRO‘s risk management process  The tool RoadRisk (step by step)  ConclusionSwiss Federal Roads Office FEDRO 2
    3. 3. Natural hazards on Swiss highwaysSwiss Federal Roads Office FEDRO 3
    4. 4. Natural hazards on Swiss highwaysSwiss Federal Roads Office FEDRO 4
    5. 5. Natural hazards on Swiss highways Studied Landslides Types Spontaneous slide Shallow debris slide Permanent slideSwiss Federal Roads Office FEDRO 5
    6. 6. Natural hazards on Swiss highwaysSwiss Federal Roads Office FEDRO 6
    7. 7. Natural hazards on Swiss highwaysSwiss Federal Roads Office FEDRO 7
    8. 8. Risk analysis Damage types • Damage types • (Direct impact, Collision, Deposits on road, Closure after event, Preventive closure)Swiss Federal Roads Office FEDRO 8
    9. 9. hazard analysis (Phase 1) • intensy maps (INT) risk analysis (Phase 2) • on the road and secondary facilities • risk of human death − direct hits − collision on road • property risk − burial: clearance and restoration costs − availability: costs as a result of interruptions − availability: precautionary closureSwiss Federal Roads Office FEDRO 9
    10. 10. published at: www.astra.admin.ch  Service  Documents for national roads  Standard, research, safety  9 Risk and security management  89001 Document: Risk concept for natural hazard on national roads (2009 V.1.30)Swiss Federal Roads Office FEDRO 10
    11. 11. Studied natural Main process type Natural hazard hazards Fall Rockfall Rock avalanche Icefall Snow avalanche Flowing avalanche Powder avalanche Snow gliding Flood / Debris flow Flooding Debris deposition Bank erosion Landslide Spontaneous landslide Permanent landslide Shallow debris slide Collapse DolinesSwiss Federal Roads Office FEDRO 11
    12. 12. Occurrence Probability R Occurence Remarks probability 0 - 10 years (x) = 1/x – 1/30 Value x based on past events > 10 - 30 years = 1/30 -1/100 = 0.023 > 30 - 100 years = 1/100 – 1/300 = 0.0067Swiss Federal Roads Office FEDRO 12 > 100 - 300 years = 1/300
    13. 13. Perimeter Hazard AssessmentSwiss Federal Roads Office FEDRO 13
    14. 14. ≤ Intensy maps (INT) • Intensity: low, medium, high • Deposit heights • How often • PSpatial Occurence • Process specific attributes: e.g, Avalanche Pressure kN, Rockfall energy in kJSwiss Federal Roads Office FEDRO 14
    15. 15. Perimeter Risk Analysis Risk calculation Only intensitySwiss Federal Roads Office FEDRO 15
    16. 16. How calculate the FEDRO his risks Step A check the intensity maps and their attributesSwiss Federal Roads Office FEDRO 16
    17. 17. Step B assign the necessary attributes to the road axes (DTV, maximum speed signalled Vmax, closure costs)Swiss Federal Roads Office FEDRO 17
    18. 18. Step C The intensity maps are then overlaid with the road axes, after which it is only the sections of road concerned which are subjected to further processing.Swiss Federal Roads Office FEDRO 18
    19. 19. Step D The sections of road concerned, together with all hazard processes and road attributes are exported as text files into RoadRisk.Swiss Federal Roads Office FEDRO 19
    20. 20. Step ESwiss Federal Roads Office FEDRO 20
    21. 21. Swiss Federal Roads Office FEDRO 21
    22. 22. Goal Swiss-wide risk mapSwiss Federal Roads Office FEDRO 22
    23. 23. Swiss Federal Roads Office FEDRO 23

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