FVS and ODF with MBG

FVS and ODF with MBG

Using FVS to Develop and Test Structure Based Management Pam Overhulser, ODF Mark Rasmussen, MB&G 2/14/07 FVS Conference MB&G & ODF 1 Outline What is the planning problem? How does FVS fit into the planning system? How was FVS used? Improvements MB&G & ODF

2 ODF planning area 632,000 acres High site Fire history Ownership history ODF structure Seven districts Foresters and managers, long tenure in place MB&G & ODF 3 ODF Forest Plan Summary Structure Based Management

accelerate growth of large diameter trees; develop multi-storied canopy produce commercial crops of timber shifting mosaic of complex structure -- no set asides Habitat Conservation Plan Targets/Outputs 50% complex structure target Maximize even-flow timber volume MB&G & ODF 4 Complex planning questions Strategic Structure v. revenue v. set asides

Agree to HCP? Tactical What to do about SNC? SBM silvicultural methods Set harvest levels Operational Adjacency constraints Road systems Owl clusters Location of complex forests

MB&G & ODF 5 Analytical process MB&G & ODF 6 H&H Model Grow Stands Schedule harvest units MB&G & ODF Operationally feasible solution 7

Planning project stats Districts/models: 7 Acres: 632,070 Stands: 6,673 Harvest units: 14,306 Polygons: 313,283 Yield tables: 79,600 Coefficients: 108,564,472

Budget: Time: $2 million 36 months MB&G & ODF 8 Why FVS? Evaluated 4 mature stand models, and 3 young stand models

Data source Support and documentation Silviculture Model behavior Flexibility Growth models evaluated four times south coast, northwestern districts, western cascades, southern Oregon MB&G & ODF 9 Using FVS 1. 2. 3. 4. 5. 6.

Calibrate FVS Choose taper system, merch specs Define structure classes Develop SBM cutting algorithms Develop SBM regimes Build, evaluate, report yields MB&G & ODF 10 Using FVS: Calibrate FVS FG & AT: Sales & SLI v. FVS projections 120 100 Mbf/acre 80 FG sales

AT sales TL 544 -354 Cas 398 262 FG 480 243 FG SLI AT SLI TL SLI 60 40 20 0 0 20 TPA:Total - >4" 40 60

80 100 120 140 160 Age MB&G & ODF 11 Using FVS: Volume calculations 1. PN, WC. SORNEC 2. Flewelling taper equations 3. Track volume and value by species by product/size/grade

4. Merch specs District Log Length Minimum Top DIB Trim Allowance Stump Height Minimum Log Length Minimum DBH Defect by age Astoria 40 5 12 1 12 8 MB&G & ODF Elliott 32

5 12 1 12 8 12 Using FVS: Define structure classes MB&G & ODF 13 Using FVS: Develop thinning specs ODF financing, Auto Mark thinning contracts, 10 years of sales MB&G & ODF 14

Using FVS: Define a set of regimes MB&G & ODF 15 Using FVS: Make and evaluate yields YTG Tools MB&G & ODF 16 MB&G & ODF 17 Planning results fmp ~ hcp

fmp ~ ta harvest volume wood emphasis reserve-based annual harvest (mmbf) 450 400 350 300 250 200 150 100 50 fmp ~ hcp 0 fmp ~ ta

complex structure percentage 1 wood emphasis reserve-based 70% 6 11 16 21 26 time ( 5-year periods ) % complex

60% 50% 40% 30% 20% 10% 0% 1 6 11 16 21 26 time ( 5 year periods )

MB&G & ODF 18 Improvements for next time FVS Thinning: clumpy v. uniform Growth: genetic gain Silviculture: Young stand and small tree growth ODF Decay Model: Track snag and down wood components Reprod SBM Structure definition: thresholds v. similarity coefficient

Inventory Yield projections: stand v. strata MB&G & ODF 19

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