Appendix H - CWHR Classification
APPENDIX H
CWHR CLASSIFICATION

FOREST INVENTORY AND ANALYSIS USER'S GUIDE
Canopy/Size Relationships
USFA Region 5 Typing/WHR System

Conifer Size Classes
Conifer Crown Diamater
USFS Region 5
WHR System
N/A 0 Seedling
(less 1" dbh)
1 Seedling
(less than 1" dbh)
N/A 1 Sapling
(1-4.9" dbh)
2 Sapling
(1-6" dbh)
Less than 12 feet 2 Pole 3 Pole
6"-11" dbh
12-24 feet 3 Small 4 Small
(11-24" dbh)
25-40 feet 4 Medum 5 Medium/Large
(greater than 24" dbh)
Greater than 40 feet 5 Large 5 Medium/Large
(greater than 24" dbh)
Greater than 1 Story 6 Two Storied 6 Multi_Layered
(Size class 5 over a distinct layer of size 4 or 3, total tree canopy greaterthan 60 percent closure.

CWHR CLASSIFICATION
FOREST INVENTORY AND ANALYSIS USER'S GUIDE
Canopy/Size Relationships
USFA Region 5 Typing/WHR System

Conifer Density Classes/Canopy Closure
Canopy Closure
USFS Region 5
WHR System
0-9 % cover 0 Non-stocked N/A
10-19 % cover
10-24 % cover
S Sparse S Sparse
20-39 % cover
20-39 % cover
P Light P Open
40-59 % cover
40-69 % cover
N Medium M Moderate
60-100 % cover
70-100 % cover
G Heavy D Dense

MAY 1997/PAGE 358

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