May Meeting

1
May Meeting

• Committee meeting 3

2
Bounds of Queries

• Fires gt 300 acres
• Year gt 1950
• Fires in Redwood

3
Query Results by Parameter

• Entire Redwood Region
• Treatment Groups
• Aspect
• Slope
• Latitude

4
Entire Redwood Region

• California Only

5
Occurrence Acreage

• Fire Occurrence 0-10 years Fire Acreage
  185-19,000
• General decrease in size and occurrence in the
  period following the 1960s
• Possible spike approximately every 10 years
  (acres burned)??????
• Total 94 fires, 138,331 acres burned between
  1950-2002

6
Same Period by Decade
7
By Month

• September experiences greatest acreage burned

8
Natural Fire Rotation and Mean Fire Return
Interval

• NFR may be a more appropriate descriptor than MFI
  for large areas

9
Treatments

• TREATMENT1
• PL plantation
• SR second growth redwood /redwood dominant
• SH second growth redwood/ hardwood dominant
• SD second growth redwood Douglas-fir dominant
• TREATMENT2
• OV other vegetation
• TREATMENT3
• OG old growth
• TREATMENT4
• DF old growth and second growth
• HD hardwood
• MX mixed conifer(old growth and second growth)

• Successional shifts between treatment groups
  would not be likely.
• Successional shifts within treatments would be
  expected.
• Given a static map treatment groups may be as
  specific as we can get.

10
Treatment Area burned / Total Treatment Area
11
Treatments
12
Fire Season
13
Aspect

• North facing slope 0-90 and 270-360
• South facing slope 90-270
• Only one fire in 1960 occurred on a South facing
  slope and not a North
• No difference in occurrence North vs. South
• Acreage burned on South facing slopes exceeded
  North slopes by 2,774 acres.

14
(No Transcript)
15
Slope

• Steep gt 50
• Moderate 30-49
• Gentle 10-29
• Flat lt 10
• Flat zones burned fewer acres than did gentle,
  moderate or steep slopes.
• MOST fires burned in a combination of all slope
  classifications.

16
Slope Position/ Occurrence Acreage
17
Latitude

• A Latitude grid was constructed at .25 degree
  intervals
• Most southerly extent of redwood experienced
  higher percent area burned
• Several latitudes with gt 5 percent areas burned
  (cyan) (f(redwoodArea)?).

18
Mean Fire Interval
19
(No Transcript)
20
My Questions

• Distance, elevation (soon PET) stats for each
  fire.
• How do I summarize this data? (one to one).
• Are we concerned with these stats on the level of
  the entire fire, or the portion in redwood?