1. A GIS Exploration Landslide Protection in Seattle
Tianxing Cheng
Mengtian Yu
Hermann Hermannsson
December 7th 2011

2. Objectives
Examine the hazard of landslide in bike routes Where are bike routes within landslide area?
Analyze the existing methods for protection
What is done to reduce landslide?

3. Data Used City of Seattle GIS Data The main bike routes
The potential landslide area
Known landslide area
hy/wa_cities/seattle/index.html

4. Analysis Use clip method in GIS Google earth for street views
Locate bike routes in landslide area
Use clip method in GIS
Find bike routes in landslide area longer than 1800ft
Google earth for street views
Panoramic views for selected bike routes
Record types of landslide protection

5. Analysis Three different types of landslide Concrete retaining walls
Vegetation
Gravity Wall
Stone loading

6. Clip method

7. Result Seattle Area 23 paths were found longer than 1800ft
347 paths were found within landslide areas
Seattle Area
Brown lines = Bike routes
Red Lines = Bike routes within landslide area
Shadow = Potential landslide area

8. Result Combine two Maps: GIS map Google earth map
Blue Shadow = Potential landslide area
Green lines = Bike routes

9. Result
Retaining wall

10. Result
Vegetation

11. Result
Gravity wall

12. Result
Stone loading

13. Result
No protection

14. Result

15. Concludion and Suggestion
Bike routes are protected for landslide
Conduct more landslide mitigation projects
Choose alternative routes in bad weather

16. Thank you.
Any Questions?