assessing pine bark beetle mortality in southern ca forests presented by california department of...
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Assessing pine bark beetle mortality in Southern CA Forests
Presented byCalifornia Department of Forestry
Mark Rosenberg
Rich Walker
Bill Stewart
Visit our web site at: http://frap.cdf.ca.gov or http://www.fs.fed.us/r5/rsl/projects/mapping/zone-map.shtml
Epidemic Begins
• In 2001 a massive pine bark beetle epidemic became evident
• Drought-induced
• Approximately one million acres have experienced severe tree mortality
• Adjacent to major metropolitan areas in San Diego, Riverside and San Bernardino Counties
• Risks from fire and falling trees pose a major threat to public safety, private property, and ecosystem health
Summer 2001
Spring 2002
Spring 2003
Epidemic Begins
Local Emergency Declared
State Emergency Declared
Chronology
Examples of Tree Mortality as of April 2003
Cooperative Strategy
• Develop decision support tools in GIS to provide Operational Support capabilities (tree removal, evacuation planning, treatment priorities)
• Conduct Monitoring activities using aerial survey, remote sensing and FIA inventory
• Leverage existing data and programs (FIA, RSL, FHP, FRAP)
Two main project components
YR 1 - Imagery Acquisition
YR 2 - Change Detection
YR 3 – Vegetation Updates
YR 4 – Inventory
YR 5 - Trend Analysis
5 Panel Project Areas
Mapping and Monitoring Activities
• Map Tree Mortality through 2003 on 963,000 acres of public and private lands
• Update seamless vegetation data across all lands
• Re-Measure approximately 100 FIA plots on public and private lands
• Assess impacts of mortality on key assets including housing, infrastructure and ecological health.
• Generate a report and publish on the World Wide Web.
Support Operational Needs
• Provide tree mortality estimates using FHP aerial survey, FRAP Mortality data and existing FIA Inventory
• Conduct Wild Life Habitat Assessments
• Model Potential Fire Behavior
• Help Prioritize & Track treatments
• Assess Wood Utilization/Disposal options
Provide Analysis support to Agencies
Challenges
• Rapidly evolving forest mortality
• Increasing risk from falling trees and extreme fire events
• Many diverse assets at risk
• Many different entities with responsibilities and liabilities
• Need for operational decision support as well as long term monitoring of forest recovery
County Non federal AllPercentage Grand Total non federal
San Bernardino 879,886 3,413,989 26%
San Diego 477,912 605,081 79%
Riverside 235,020 1,134,091 21%
Los Angeles 1,049 9,430 11%
Grand Total 1,593,867 5,162,591 31%
Current Mortality in Bone Dry Tons by County (September 2003)
County Non federal AllPercentage Grand Total non federal
San Bernardino 1,423,067 6,256,486 23%
San Diego 871,129 1,159,960 75%
Riverside 434,903 1,799,190 24%
Los Angeles 9,727 69,626 14%
Grand Total 2,738,826 9,285,262 29%
All counties non federal current mortality acres
40%
60%
Residential
Sparse w ith forest
All counties non federal projected mortality (intermediate) bone dried tons
38%
62%
Residential
Sparse w ith forest
County Non federal AllPercentage Grand Total non federal
San Bernardino 1,966,248 9,098,983 22%
San Diego 1,264,345 1,714,840 74%
Riverside 634,787 2,464,288 26%
Los Angeles 18,406 129,823 14%
Grand Total 3,883,786 13,407,934 29%
All counties non federal projected mortality (long range) bone dried tons
37%
63%
Residential
Sparse w ith forest
Projected Mortality (intermediate) in Bone Dry Tons by County
Projected Mortality (long range) in Bone Dry Tons by County
Current and Projected Mortality estimates using FHP aerial survey data and existing FIA Inventory
High Priority Treatment areas
54%25%
21%
San Bernardino
San Diego
Riverside
County Total
San Bernardino 70,766
San Diego 32,878
Riverside 27,590
Grand total 131,234
High Priority Treatment areas
• Within 150 feet of Electricity Transmission Lines
•Within 150 feet of Primary Roads
•Within 150 feet of Secondary Roads
•Areas with housing density of 1 house per 20 acres or greater
• Areas outside of Federal lands and having a housing density of less than one house per 20 acres and slopes less than or equal to 30%
Current mortality acres inside treatment area by county
County TransmissionPrimary roads
Secondary roads Housing
PVT non-residential w / slope ≤ 30% Total
San Bernardino 291,169 33,849 245,803 236,427 124,750 931,997San Diego 2,466 5,895 86,493 30,386 228,140 353,379Riverside 56,232 5,974 59,491 42,220 54,306 218,224Grand total 349,867 45,718 391,787 309,033 407,196 1,503,600
All counties current mortality in bone dry tons inside treatment area by priority asset
class 23%
3%
26%21%
27%
18%
4%
33%14%
31%
Transmission
Primary roads
Secondary roads
Housing
PVT non-residential w / slope ≤ 30%
San Diego current mortality in bone dry tons
inside treatment area by priority asset class
1%24%
9%
64%
2%
Riverside current mortality in bone dry tons inside treatment area by priority asset class
26%
3%
27%19%
25%
Current mortality (BDT) inside treatment area by priority asset class and county
San Bernardino current mortality in bone dry tons inside treatment area by priority asset
class
32%
4%26%
25%
13%
Implications for the Future…• Need for quick initial assessments of current conditions
• Increasing demand for frequent updates to core data sets that describe natural conditions as well as key assets
• Require an ability to integrate various kinds of data sets to support a wide range of activities from operational to long term monitoring
• Need for various kinds of support tools for a large and varied client base with highly variable skill levels
• Need for ongoing processes to provide data and reports that are timely and applicable to current issues
Thank You
Contact Information
Visit our web sites at:
www.frap.cdf.ca.gov
www.fs.fed.us/r5/rsl/projects/mapping/zone-map.shtml
Mark Rosenberg
Email: mark.rosenberg@fire.ca.gov
Phone: (916)445-5366
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