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Community exposure in Los Angeles County to coastal flooding hazards
based on storm and sea level rise scenarios
Nathan Wood Jeanne Jones Peter Ng Kevin Henry Jamie Jones Jeff Peters Nina Abdollahian USGS Western Geographic Science Center
U.S. Department of the Interior U.S. Geological Survey
www.usgs.gov/apps/hera
Community Exposure to Coastal Hazards in California
Maps of Flood Hazard Zones
Maps of Flood Hazard Zones
Providing Guidance on SLR Scenarios
Demography
Source - 2010 Census blocks Attributes: • Total residential population • Age – < 5 years and > 65 years • Ethnicity – Hispanic • Race – American Indian, Asian, Black or African American, Native Hawaiian or Pacific Islander, White, Other
• Occupancy – renters, homeowners • Group quarters – institutionalized, non-institutionalized
Current conditions (i.e., no storm)
Economic assets
• Employees: Government, Manufacturing,
Natural Resources, Services, Trade
• Parcel values – improved, land
• Building replacement value: Agriculture,
Commercial, Education, Government, Industrial,
Religious facility, Residential
Current conditions (i.e., no storm)
Infrastructure
• Roads – highways, secondary streets, surface streets
• Railroads • Critical facilities
• Fire stations, Hospitals, Medical facilities, Medical clinics, Medical services, Police stations, Schools
Current conditions (i.e., no storm)
Land Cover
Developed land (NLCD)
Wetlands (NLCD)
Current conditions (i.e., no storm)
Los Angeles County
Uncertainty extent: maximum minimum
Comparative Metrics – number vs. community percentage of asset in hazard zone
Malibu 765 residents 6% in zone
Long Beach 15,676 residents 3% in zone
Comparative Metrics – impact of sea level rise
100 year storm, no SLR 100 year storm, 100 cm SLR
Data tables
• Provides the user with the ability to: • Examine flooding hazard exposure for an individual community • Explore changes in community exposure given multiple coastal storm and SLR scenarios • Compare the exposure of multiple communities
• Interactive maps , charts, and graphics visualize exposure in hazard zones of:
• Populations • Economic assets • Land cover • Infrastructure
• For more information
• Jeanne Jones (lead HERA developer) – [email protected] • Nathan Wood (principal investigator) – [email protected] • HERA web application - www.usgs.gov/apps/hera • Project background - https://geography.wr.usgs.gov/science/vulnerability/HERA.html
Summary for HERA