Panoramic Hill Emergency Egress Route

Sara Gale, MPHColleen Reid, MPHMay 8, 2007CP255: Urban Applications of Geographic Information Systems

Problem

Panoramic Hill has many hazards Hayward fault Wildfires Landslides Narrow roads with hairpin turns Steep terrain

Problems of Egress and Access

Data InputsData layer list: Source:

Digital orthographic photos Oakland 2002 Imagery Miers Project, USGS Seamless site 2004, City of Berkeley Planning Department 2004?

Berkeley roads AEGIS, UC Berkeley

Oakland roads Miers Project, 2002

Elevation points Hypso—USGS 1:24,000 orthoquads,C-spots 1995 Fire project by John Radke

Liquefaction hazard zones California Geologic Survey, Seismic Hazards Zone Report 080www.conservation.ca.gov/cgs

Landslide hazard zones California Geologic Survey, Seismic Hazards Zone Report 080www.conservation.ca.gov/cgs

Berkeley parcels 1999 AEGIS lab study

Oakland parcels Miers Project, 2002

Parcel ownership data Effie Yee, Old Republic Title Company via John and Judith Radcliff and Jerry Wachtel

EB Regional Parks boundary Meg PetersonEast Bay Regional Park DistrictPlanning, Stewardship and GIS Services

Streams Based on hypsography lines from USGS 1:24,000 orthoquads

Fault lines and other Earthquake data USGS

Map of Past Fires

Potential Landslide Zones

Slope

Landslides and Slope

Strategic Approach: Suitability Analysis

Weight each hazard (e.g. steep slope value) Overlay each layer and union all data into

one layer Sum the hazard weights to get a total hazard

score

Values for Suitability Analysis

Slope (degrees) 46-90 = 3 31-45 = 2 16-30 = 1 0-15 = 0

Fault Line (distance to fault)

<100 feet = 3 101-200 feet = 2 201-300 feet = 1 >300 feet = 0

Landslide In landslide zone = 2 Otherwise = 0

Stream Within 10 ft on either

side of stream = 1 Otherwise = 0

Fire Property Ownership

Suitability Map

Possible Walking Routes

Possible Road Routes

Conclusions

There should be many routes for egress on foot, which would save egress by car for those with mobility concerns

There are many proposed emergency access roads

Our final analysis will detail the pros and cons of each route

Special Thanks

Prof. John Radke Jerry Wachtel and Dick White