Landslide Risk Mapping Landslide Risk Mapping for the Entire Swiss - - PowerPoint PPT Presentation

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Landslide Risk Mapping Landslide Risk Mapping for the Entire Swiss National Road Network Philippe Arnold Philippe Arnold Swiss Federal Roads Office (FEDRO) 3003 Bern philippe.arnold@astra.admin.ch philippe.arnold@astra.admin.ch May 2014

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Landslide Risk Mapping Landslide Risk Mapping for the Entire Swiss National Road Network

Philippe Arnold Philippe Arnold Swiss Federal Roads Office (FEDRO) 3003 Bern philippe.arnold@astra.admin.ch

May 2014 GEOSPATIAL World Forum 1

philippe.arnold@astra.admin.ch

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Content Welcome the tool RoadRisk (step by step) Conclusion

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Switzerland

8 million inhabitants
41,285 square

kilometres

26 cantons
4 national languages
Zurich

394,000

Geneva 194,000
Basel

172,000

Lausanne 130,000
Bern 126 000

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Switzerland – Tourism

44 peaks higher than 4,000

metres above sea level

Mediterranean-like climate
n the south side of the Alps
10 locations on the
10 locations on the

UNESCO list of World Natural Heritage sites

Tourism industry: 6.5
Tourism industry: 6.5

percent of GDP

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Switzerland Road infrastructure Road infrastructure

3,000 engineering structures

Noise prevention
Wildlife corridors
Galleries
230 tunnels
230 tunnels

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Switzerland Transit country Transit country

9 million vehicles cross the

Alps each year, 1.2 million of Alps each year, 1.2 million of which are heavy goods vehicles

10 major road transit routes

pass through the Alps

4 of which via Switzerland
Grand St. Bernard
Simplon
Gotthard
San Bernardino

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The Swiss motorway network network

1960: Parliament

approves construction

f motorway network
f motorway network
2012: 96 percent

completed – 84 kilometres to be kilometres to be constructed

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The motorway network today network today

7 million vehicles per

day

440 connections
19,000 hours of traffic
19,000 hours of traffic

jams per year

34 service stations
26 billion vehicle

kilometres

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Traffic volume on the motorway network motorway network

85 percent of traffic jams
ccur in the

agglomerations

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Importance

f engineering
f engineering

structures

Protection against
Protection against

rockfalls and avalanches

Galleries
Galleries
Protection against

noise

Wildlife corridors
Wildlife corridors

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Natural hazards 2

FEDRO has launched a

project focusing on a risk- based, nation-wide and network-related approach to dealing with severe natural hazards natural hazards

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Natural hazards

n Swiss
n Swiss

highways

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Natural hazards on Swiss highways Swiss highways

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Natural hazards on Swiss highways Swiss highways

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hazard analysis (Phase 1)

intensy maps (INT)
intensy maps (INT)

risk analysis (Phase 2)

on the road and secondary facilities
risk of human death
risk of human death

direct hits collision on road

property risk

burial: clearance and restoration costs availability: costs as a result of interruptions interruptions availability: precautionary closure

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www.astra.admin.ch

published at: Service Documents for national roads Standard, research, safety Standard, research, safety 9 Risk and security management 89001 Document: natural hazard on 89001 Document: natural hazard on national roads: Risk concept for (2012 V.2.10)

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Studied natural hazards

Main process type Natural hazard

hazards

Fall Rockfall Rock avalanche Icefall Snow avalanche Flowing avalanche Snow avalanche Flowing avalanche Powder avalanche Snow gliding Flood / Debris flow Flooding Debris deposition Bank erosion Landslide Spontaneous landslide Permanent landslide Permanent landslide Shallow debris slide Collapse Dolines

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Occurrence Probability

Return period Occurence probability Remarks

Probability

Return period Occurence probability Remarks

0 - 10 years (x) = 1/x – 1/30 Value x based on past events past events > 10 - 30 years = 1/30 -1/100 = 0.023 > 30 - 100 years = 1/100 – 1/300 = 0.0067 > 100 - 300 years = 1/300

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Perimeter Hazard Assessment Assessment

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Intensy maps (INT)

Intensity: low, medium,
Intensity: low, medium,

high

Deposit heights
How often
How often
PSpatial Occurence
Process specific attributes:

e.g, e.g, Avalanche Pressure kN, Rockfall energy in kJ

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Perimeter Risk Analysis Analysis

Risk calculation Risk calculation Only intensity

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How calculate the How calculate the FEDRO his risks Step A Step A

check the intensity maps and their attributes and their attributes

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Step B

assign the necessary attributes to the road axes (DTV, maximum speed signalled Vmax, closure signalled Vmax, closure costs)

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Step C

The intensity maps are then

verlaid with the road

axes, after which it is only the sections of road the sections of road concerned which are subjected to further processing.

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Step D

The sections of road concerned, together with all hazard processes and road attributes are road attributes are exported as text files into RoadRisk.

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Step E

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Goal

Swiss-wide risk map Swiss-wide risk map

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