Determine rate of recovery by repeating the above measurements through time (Raison et al. 1998) (e.g. 5, 10, 30 and 80 years for compaction recovery).
11. Determine rate of recovery by repeating the above measurements through time (Raison et al. 1998) (e.g. 5, 10, 30 and 80 years for compaction recovery).
Table 1. A system for classifying soil impacts following timber harvesting and site preparation.
A: Operational categories
Operational category
Definition
Unharvested Area (UA)
Areas of retained forest or other vegetation
Harvested Area (HA) General logging area within which trees are felled Firebreak (FB)
Perimeter boundary
Snig Tracks (ST) Tracks created by towing or winching logs to the landing Log Landings (LL)
Area where logs are snigged for sorting and loaded for transportation Access Roads (AR)
Temporary roads used during the harvesting operation
B: Soil disturbance categories:
Degree of soil profile Dominant
Type of mixing/ removal
disturbance horizon
Undisturbed (S0)
Forest intact (FI)
O1
Understorey intact (UI)
O1
O1 Lightly disturbed(S1)
Litter layer intact (LI)
Litter layer disturbed (LD)
O2
O2 Moderately disturbed (S2)
Litter layer partially removed (LR)
Litter completely removed and topsoil exposed (TE) A
Litter mixed with topsoil (LM)
A Topsoil disturbed (TD) 1 A
Topsoil mixed with subsoil (TM)
A Severely disturbed (S3)
Topsoil partially removed (TP)
Topsoil completely removed and subsoil exposed (SE) B
Topsoil mixed with subsoil (SM)
B Subsoil disturbed (SD) 2 B
Subsoil mixed with parent material (SC)
Subsoil partially removed (SR)
B Subsoil removed and parent material exposed (PE)
C. Soil and slash piling categories:
Category Definition
Soil piling (SP)
Soil piled at a height >0.3 m
Soil and slash piling (SS)
Soil and slash piled at height >0.3 m
Slash and/or bark piling (SB)
Slash and/or bark piling at height >0.3 m
D. Fire intensity categories:
Category Definition
Unburned (F0)
Litter, soil or vegetation unburned.
Low intensity (F1) Partial burn of slash and litter of diameter up to 20 mm. Litter O 2 horizon,
where present, predominantly unburned.
Moderate intensity (F2) Near-complete burn of slash and litter of diameter up to 20 mm, partial burn of branches greater than 20 mm. Some soil oxidation present, but generally charcoal or ash-seedbed.
High intensity (F3) Near-complete burn of slash and litter of diameter up to 70 mm, partial burn of branches greater than 70 mm. Soil oxidation (orange ash-bed) predominant.
1 Topsoil consists of A 1 ,A 2 and A 3 horizons except where A 2 is conspicuously bleached, whereby A 2 and A 3 are regarded as subsoil. 2
Subsoil includes B 1 and B 2 horizons and conspicuously bleached A 2 horizon (and any other A-horizon below the A 2 ).
Table 2 Data sheet for recording soil disturbance
Coupe: Anderson Spur
KEY: * Random Starting quadrat; Coupe Number:
08/307/003/; Coupe Location: Toolangi State Forest
Project Number:
2.6 ESD; Date of Surveying:
18-28/5/98
Transect Fire Breaks
Bearing Distance Aspect Slope Topographic Operation Mixing /
Horizon Disturbanc Fire
Cover
Piling Core Bd Sample
e Snig Tracks (metres) (degrees) (degrees Position Area Removal Core Class (%)
Number Number
1 *3.0 FB: 0-2.7
F2 85 N 703 1 ST: 37.4-46.0
FO 35 N L344 2 335 50 (6) 210 13 LS HA TM A S2 F2 45 SS
FO 40 N L206 4 335 90 (10) 180 9 MS HA TD A S2 FO 85 SP 335 100 (11) 175 5 MS HA LR A S2 F2 55 SP
FO 25 N L60 5 335 130 (14) 170 6 MS HA TM A S2 F1 15 SS
L290 6 Boundary end-
AR: 144.0-161.1
161.1 335 160 (17) 185 2 MS AR TD A S2 FO 5 SP
2 *1.5 FB: 0.2-2.4
F1 10 N L396 8
F3 25 N L106 9
F1 15 N L346 10 ST: 70.0-74.6
F3 15 N ST: 100.0-116.8
3 MS
HA LR
A S2
3 MS
ST
TD
A S2
F3 5 N
L418 11
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