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Continuous Forest Inventory for the Northwest Region Bureau of Indian Affairs

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Continuous Forest Inventory for the Northwest Region Bureau of Indian Affairs Arnie Browning, Forester NWRO BIA Portland, OR. (503) 231-6205 * ARNEY, J.D. 1985, A ... – PowerPoint PPT presentation

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Title: Continuous Forest Inventory for the Northwest Region Bureau of Indian Affairs


1
Continuous Forest Inventory for the Northwest
Region Bureau of Indian Affairs
  • Arnie Browning, Forester
  • NWRO BIA Portland, OR.
  • (503) 231-6205

2
BIA Northwest Region
3
BIA Northwest Region
  • 2,664,000 acres timberland mostly on Category 1
    reservations (over 1MMBF AAC, or 10,000 acres)
  • 385 MMBF Annual Allowable Cut
  • All Cat 1 reservations have Continuous Forest
    Inventory (CFI) plots except Grand Ronde. Many
    have Stand Inventory also.

4
History of CFI
  • Late 1940s Calvin B. Stott, USFS introduced CFI
    to Lake States
  • The original purpose of the CFI was to collect
    stocking, growth, removal, and mortality
    information indispensable to the establishment of
    broad management policies on large forest areas.
    (Stott, 1960)

5
East-side CFI Statistics
6
Steps in the CFI Process
  • Pre-Inventory
  • Review previous CFI Field Manual
  • Revise Manual for the re-measurement
  • Write data entry and edit program
  • Data collection and error checking
  • Regression analysis, more data cleaning
  • Write CFI program (VB 6 and Fortran 90)
  • Write User Manual and assist with program
    installation and operation
  • Assist with inventory analysis, growth and yield
    modeling, harvest scheduling, AAC.

7
Each re-measurement starts by preparing a Field
Handbook describing what data will be taken
PRE-INVENTORY
8
Nez Perce CFI Plot Design
9
Changes in Sample Design
  • 1950 -1980
  • Cluster of 2 or 3 one-fifth or one-quarter acre
    subplots, usually on one-mile grid
  • 1/20th acre minor plot for height and form class
  • 1/100th acre minor plot for seedlings/saplings
  • Plot data timber type, habitat type, slope,
    aspect, etc
  • Tree data spc, dbh, crown ratio, height, tree
    history, problem/severity, age or age class, etc
  • Re-measure every 10 years
  • 1980 present
  • re-measure only one plot per cluster (each
    subplot was always treated as an independent
    sample point)
  • Double the grid, usually ½ mile grid (more
    even-aged treatments, more stratification of the
    data)
  • Add snag data, fuel transect data, 3 tree
    problem/severity codes per tree (usually FVS
    codes), new height sample

10
Changes in Height Sample
  • Before 1990
  • Measure total height on all trees 5 inches dbh
    and larger on 1/20th or 1/16th acre minor plot
  • After 1990
  • On 1/5 acre plot, measure total height on the
    first tree of each species in each 5 inch dbh
    class, and all trees 20 in. dbh and larger.

11
CFI Data Entry and Edit (CFIDEER)
  • An ACCESS database is prepared with tables of
    Plot Records, Tree Records, Regen Records,
    sometimes Fuels Records
  • Separate tables for each measurement
  • A version of CFIDEER is made
  • makes files to load into Allegro Field Data
    Recorders.
  • thorough error checking routines

12
DATA COLLECTION AND ERROR CHECKING
  • Field crews are trained then begin re-measuring
    CFI plots
  • Plot Location Cards, aerial photos are updated as
    needed
  • Plot centers are recorded with GPS units
  • Quality control on at least 10 of plots
  • Download handhelds each day

13
Regression Analysis
  • After data is cleaned, NWRO develops height
    models by species.
  • Sometimes diameter growth and form class data are
    also regressed
  • Analysis is done with SigmaStat and Sigma Plot
    software

14
Changes in Height Model
  • 1950 1987
  • Ht b0 b1 DBH b2 (DBH)2
  • (2nd or 3rd degree polynomial)
  • poor fit outside range of data, must cap
  • 1988 2002
  • Ht 4.5 exp (b0 b1 / (DBH1))
  • Wycoff et.al,1982
  • Usually stratify height sample by productivity
    class
  • 2002 present
  • Ht 4.5 b0 (exp (-b1 (DBH)b2 ))
  • Arney, 1985

15
Comparison of Ht Models FVS
  • Slightly over estimates at 5 10 inches dbh
  • Slight under estimates at large diameters
  • Almost always a reasonable model

16
FPS Height Model
  • Usually slightly improved fit through the entire
    range of DBH (when compared with FVS height
    model)
  • Still getting experience with this model (only
    Warm Springs and Quinault)

17
Plot the data and the model
  • Our experience with FPS height model is limited
    one unreasonable model so far.
  • Thanks to error-trapping in Flewelling taper
    code, we discovered this problem

18
Write CFI Program
  • A Windows Program is written by NWRO
  • Uses Visual Basic 6 for the User Interface
  • Number crunching done by a FORTRAN 90 dynamic
    link library (dll)
  • CFI.EXE contains many user options to sort the
    data, selects a variety of output tables, select
    merchantability standards, etc.

19
Alternatives for Volume and Taper
  • Behres Hyperbola Explained in 1983 Forest Mgt
    Inven. Handbook, App 1D
  • Form Class DIB17/DBH
  • Used in CFIs from 1950s to present
  • Most DIB at 17 feet measured in 1970s to 1980s on
    CFI minor plots

20
Form Class
  • The theory of form class volume tables is that
    for a given height, trees vary in taper in the
    first log, but above the first log, taper is
    quite similar for trees of the same size and
    merchantable height, regardless of species. John
    Bell, 1988.
  • Most of the taper is in the first log.

21
Behres Hyperbola
  • BHT THT - 17.3
  • RHT THT - upper stem ht
  • L RHT / BHT
  • D L / (0.49 L 0.51)
  • DIB DIB17 D

22
BIA Board Foot Volume
  • Regression formulas were developed by regressing
    the Factors published on page 38 of the Official
    Rules for the Log Scaling and Grading
    Bureaus, January 1, 1982
  • BDFT /Log (a b(DIB) c(DIB)2) x Length

23
Johnsons Cubic Foot Volume
  • Until 1995 only Johnsons Cubic Foot formula was
    used to calculate volumes
  • CUFT calculated for a Butt and Upper segments
    of a tree with formulas using Form Class, DBH,
    and DIB.

24
West-side Taper Coop
  • Completed May 2, 1994
  • For Douglas-Fir, Western Hemlock, and Western
    Redcedar
  • Quinault Tribe, Washington DNR, Industrial Forest
    Owners, contributed felled tree data
  • Data modeled by James Flewelling, PhD copywrited.

25
INGY Taper Coop
  • Distributed to INGY Members Sep. 1996
  • Sectioned tree data collected for
    AF,DF,ES,GF,LP,MH,PP,RC,SF,WF,WH, WL,WP
  • INGY participants included Flathead, NezPerce,
    Spokane, and WS Tribes, Boise Cascade, Champion,
    Potlatch, DNR, USFS, BC Min of Forests
  • Modeled, copywrited by James Flewelling

26
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27
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28
After processing each re-measurement a User Guide
is made for each CFI Program
29
Uses of CFI data and programs
  • Quantify changes and trends in the forest
    stocking, growth, harvest, mortality
  • Data used to calibrate growth and yield models
    (both FVS and FPS have used CFI data from
    reservation forests)
  • Harvest Scheduling, Annual Allowable Cut
  • Assess Forest Management Plans achievement of
    goals
  • Strategic Forest and Fire Management Planning

30
Boardfoot Stocking Trends
Colville, Spokane, Warm Springs, and Yakama
31
Boardfoot Stocking Trends
Flathead and Nez Perce
32
Harvest vs. Net Growth
Colville, Warm Springs, Yakama
33
Harvest vs. Net Growth
Flathead and Nez Perce
34
Mortality Coeur dAlene, Colville, Warm Springs,
Yakama
35
Mortality Flathead, Nez Perce, Spokane
36
Warm Springs Ponderosa Pine Stocking Trend
1972-1997
37
Warm Springs stocking trend, all species
combined, 1972 1997
38
Warm Springs Harvest and Net Growth Trends 1972 -
1997
39
Changes in Annual Allowable Cut
40
Nez Perce 2003 CFI Tree locations were Taken by
measuring Azimuth and distance to each tree Used
laser range Finder and electronic Compass Added
45 minutes to Each plot
41
Nez Perce Plot 602 in 2003
42
Plt 602 SVS and ArcGIS comparison
43
WS P. Pine, bitterbrush, fescue
  • Middle Creek Logging Unit (before harvest)
  • March 1979

44
Warm Springs, Tenino HFR Project
45
Warm Springs, Tenino HFR Project
46
WS Cache Creek Rehab, 1981
47
WS Snowbrush Rehab 9, 2005 Planted 1986
48
WS Camas Prairie Blowdown 1978
49
WS Camas Prairie blocks 4 - 8
  • 1978 Blowdown, looking west, N. Pinhead Butte

50
Yakama Weaver Photos
  • Pine Butterfly (1920) area Upper Satus Canyon

51
Yakama Weaver Photo
  • Ponderosa Pine 84.5 DBH Douglas-fir 98 DBH

52
Yakama Pine type to Fir type
53
Yakama Spruce Budworm 1996-2000
54
Umatilla Mt Pine Beetle Spruce Budworm
55
Flathead Unevenaged Stocking Plots
56
FLT Wilcox Plots 2500bf (25 sq.ft/ac.)
57
FLT Wilcox Plots 3500 bf (35 sq.ft./ac.)
58
Makah Started Second Growth Harvest 1980 WH, WRC,
S. Spruce
59
Site quality changes with position on the slope
(near Makah)
60
Coeur dAlene, CFI Plot 39
61
CFI Plot 39, Plot Center Stake
62
CFI Plot 510, Kurt Mettler inspects tree tag
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