allocation effects on sustainability within a solid wood chain a case study in south scotland...
TRANSCRIPT
Allocation Effects on Sustainability within a Solid Wood Chain
A Case Study in South Scotland
Stefania Pizziraniand Barry Gardiner, John Fonweban and Stephen Bathgate
Forest ResearchScotland
Ways to Allocate1. Cut using Business As Usual
practices (eg—wood products based on stem diameter)
3. Cut using Stand Level Allocation to achieve both the optimal range of products per tree and to satisfy market demand
2. Cut using Forest Level Allocation to meet consumer demand (eg—biofuel industry)
Business as usual
Green sawlog:Diam >18cm at 6mStraightness ≥ 3
Red sawlog:Diam >18cm at 6mStraightness <3
Pallet:Diam 14-18cm at 6m
Biomass:Diam <14cm at 6m
Green sawlog Red sawlog
• System developed for use in Sitka spruce• Can be used to predict out-turn of “green” logs
Stem Straightness Scoring
Stem Stiffness ScoringTree level - ST300 Log level - HM200
19.656 0.05173 - 0.6097 - 0.05071 - 0.005335
-0.002454 0.00001729 0.00231
0.0001536 0.00001089
Age YC elevation Latitude
InitialStocking elevation Latitude YC elevation
YC InitialStocking elevation Initi
MOE
-0.0000006935
alStocking
YC elevation InitialStocking
0.855 0.1147 - 0.0398dbhMean DAS SS M
% 8.632 -1.443Total Log V
Green Log Volu
lume
me
oMeanSS
Stem Straightness and Stiffness Models
Premise for Allocation Study
Saw
log
Saw
log
Pal
let
Pal
let
Bio
fue
l Bio
fue
l
Bio
fuel
Bio
fuel
B.A.U. F.L.A. B F.L.A. P F.L.A. S
Sta
nd L
evel
Allo
catio
n
Case Study in Southern Scotland
Case Study in Southern Scotland• Time period of 30 years from
2005• 119 ha in forest stand• 3694 m3 removed from
thinnings• 68349 m3 removed from final
fellings• 72043 total m3 removed• 2782 trips to sawmills by 44
tonne trucks• Assumed values: £35/m3 green
sawlog, £30/m3 red sawlog, £25/m3 pallet, £20/tonne biofuel
Processing Plants
Scenario 1
Business as Usual- 100% of sawlogs to Dumfries where 80% is Green log and 20% is re-allocated as Red log to Kirriemuir- 100% Red logs to Kirriemuir- 100% of Pallet to Lockerbie- Remainder as Biofuel to EON Lockerbie
Scenario 2
Forest Level AllocationBiofuel
- 100% of forest allocated as Biofuel to EON Lockerbie
Scenario 3
Forest Level AllocationPallet
- All logs allocated as Pallet to Lockerbie- Remainder as Biofuel to EON Lockerbie
Scenario 4
Forest Level AllocationSawlog
- 100% of sawlogs to Dumfries where 80% is Green log and 20% is re-allocated as Red log to Kirriemuir- 100% Red logs to Kirriemuir- Remainder as Biofuel to EON Lockerbie
Scenario 5
Stand Level Allocation- 100% of Green logs to Dumfries- 100% of Red logs to Kirriemuir- 100% of Pallet to Lockerbie- 100% of Biofuel to EON Lockerbie
Craik Wind Risk
Craik Straightness
Indicator Results - GVA
Gross Value Added
0
10
20
30
40
50
60
70
BAU FLA B FLA P FLA S SLA
Scenario
GV
A in
£/m
3
BAU Gross Value Added per Process (£)
Growing phase
Felling
Forwarding
Transport to mill
Re-transport
Indicator Results – Employment
Employment
75
76
77
78
79
80
BAU FLA B FLA P FLA S SLA
Scenario
Ab
so
lute
Nu
mb
ers
of
Em
plo
yees
BAU Employment per Process (absolute numbers)
Growing phase
Felling
Forwarding
Transport to mill
Re-transport
Indicator Results – Timber Miles
Total miles travelled
0
100000
200000
300000
400000
500000
600000
BAU FLA B FLA P FLA S SLA
Scenario
Nu
mb
er
of
miles
BAU Total Miles Travelled per Process
Growing phase
Felling
Forwarding
Transport to mill
Re-transport
Indicator Results - GHG
Green House Gases
0
500000
1000000
1500000
2000000
2500000
BAU FLA B FLA P FLA S SLA
Scenario
Kg
CO
2 eq
uiv
alen
t
BAU Kg of CO2e per Process
Growing phase
Felling
Forwarding
Transport to mill
Re-transport
Conclusions• Results depend on end-user’s priorities• This case study was a examination of how ToSIA
might be applied at a stand level• Allows the user to ‘play’ with the data to see how
different scenarios may affect the outcome of various indicators
• Allocation only of value if price differentials significant
• The results are only as good as the input data – room for improvement
• Scenarios simplistic – room for refinement
Thank you!