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

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 GEOSPATIAL World Forum 1

Content Welcome the tool RoadRisk (step by step) Conclusion May 2014 GEOSPATIAL World Forum 2

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 May 2014 GEOSPATIAL World Forum 3

Switzerland – Tourism • 44 peaks higher than 4,000 metres above sea level • Mediterranean - like climate on 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 May 2014 GEOSPATIAL World Forum 4

Switzerland Road infrastructure Road infrastructure 3,000 engineering structures • Noise prevention • Wildlife corridors • Galleries • 230 tunnels • 230 tunnels May 2014 GEOSPATIAL World Forum 5

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 May 2014 GEOSPATIAL World Forum 6

The Swiss motorway network network • 1960: Parliament approves construction of motorway network of motorway network • 2012: 96 percent completed – 84 kilometres to be kilometres to be constructed May 2014 GEOSPATIAL World Forum 7

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 May 2014 GEOSPATIAL World Forum 8

Traffic volume on the motorway network motorway network • 85 percent of traffic jams occur in the agglomerations May 2014 GEOSPATIAL World Forum 9

Importance of engineering of engineering structures • Protection against • Protection against rockfalls and avalanches • Galleries • Galleries • Protection against noise • Wildlife corridors • Wildlife corridors May 2014 GEOSPATIAL World Forum 10

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 May 2014 GEOSPATIAL World Forum 11

Natural hazards on Swiss on Swiss highways May 2014 GEOSPATIAL World Forum 12

Natural hazards on Swiss highways Swiss highways May 2014 GEOSPATIAL World Forum 13

Natural hazards on Swiss highways Swiss highways May 2014 GEOSPATIAL World Forum 14

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 May 2014 GEOSPATIAL World Forum 15

published at: www.astra.admin.ch 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) May 2014 GEOSPATIAL World Forum 16

Studied natural Main process type Natural hazard hazards hazards Fall Rockfall Rock avalanche Icefall Snow avalanche Snow avalanche Flowing 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 May 2014 GEOSPATIAL World Forum 17

Occurrence Probability Probability Return period Return period Occurence probability Occurence probability Remarks 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 May 2014 GEOSPATIAL World Forum 18

Perimeter Hazard Assessment Assessment May 2014 GEOSPATIAL World Forum 19

= Intensy maps (INT) Intensy maps (INT) • • Intensity : low , medium, Intensity : low , medium, high • Deposit heights • • How often How often • P Spatial Occurence • Process specific attributes : e.g, e.g, Avalanche Pressure kN , Rockfall energy in kJ May 2014 GEOSPATIAL World Forum 20

Perimeter Risk Analysis Analysis Risk calculation Risk calculation Only intensity May 2014 GEOSPATIAL World Forum 21

How calculate the How calculate the FEDRO his risks Step A Step A check the intensity maps and their attributes and their attributes May 2014 GEOSPATIAL World Forum 22

Step B assign the necessary attributes to the road axes (DTV, maximum speed signalled Vmax, closure signalled Vmax, closure costs) May 2014 GEOSPATIAL World Forum 23

Step C The intensity maps are then overlaid with the road axes, after which it is only the sections of road the sections of road concerned which are subjected to further processing. May 2014 GEOSPATIAL World Forum 24

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. May 2014 GEOSPATIAL World Forum 25

Step E May 2014 GEOSPATIAL World Forum 26

May 2014 GEOSPATIAL World Forum 27

Goal Swiss-wide risk map Swiss-wide risk map May 2014 GEOSPATIAL World Forum 28

May 2014 GEOSPATIAL World Forum 29