Frdric Mothe, Gilles Le Mogudec, Grard Nepveu, Emmanuel Bucket - PowerPoint PPT Presentation

A logging module for oak connected to the Fagacées model Simulation du billonnage de chêne en sortie du modèle de croissance Fagacées Frédéric Mothe, Gilles Le Moguédec, Gérard Nepveu, Emmanuel Bucket LERFOB : Laboratoire d'Etude des Ressources Forêt-Bois UMR INRA-ENGREF, 54280 Champenoux, France

Objective (stands | scenarios...) Improve the quality assessment of the modelled trees by considering logging strategy and target products => simulate the logging process using the stem taper description delivered by the growth models oak specific Pp3 Fagacées logging module Work initiated in collaboration with Emmanuel Bucket (CTBA) "Modélisation des bilans "environnement" et "produits" de sylvicultures contrastées de chêne sessile" (convention de coopération INRA- CTBA 2003-2004) and others... generic logging module in progress Capsis 2006 2

Operating principle of the oak logging module Logging oriented toward a list of products : sorted by selection using the data tranchage priority order available in Fagacées : growth rings sliced veneers merrains sapwood / heartwood staves aubier / duramen (wine barrels) knotty core plot coeur branchu unedged sawing bark (furniture/joinery) sawing crown base LVL LVL sciage particle boards industriel fire wood Capsis 2006 3

Logging rules for oak Product priority number length diameter wood quality stump 1 1 0.3 m - - ∅ MED ≥ 50 cm ∅ CB ≤ 10 cm slicing 2 1 1 - 2.2 m ∅ MED ≤ 140 cm ( ∅ DUR - ∅ CB ) / 2 ∅ MED ≥ 45 cm 3 2 1.1 m staves ≥ 9 cm ∅ ∅ DUR )² ≤ ( CB / ∅ FB ≥ 25 cm 4 - 3 - 5 m furniture 13% 5 - ∅ FB ≥ 25 cm - sawing 3 - 5 m ∅ CB ≤ 12 cm 6 - ∅ FB ≥ 18 cm LVL 1.5 m ∅ DUR ≥ 14 cm particle 7 3 2 - 2.2 m ∅ FB ≥ 7 cm - boards 8 - 0.5 - 1 m ∅ FB ≥ 7 cm - firewood top log 9 - - - - Capsis 2006 4

Algorithm used for processing one tree Begin Tree taper Logging rules H = 0 stump product = stump slicing staves furniture search for the sawing max valid length LVL = L particle firewood top log L = 0 ? Capsis 2006 5

Algorithm used for processing one tree Begin Logging rules H = 0 stump stump product = stump slicing slicing staves staves furniture furniture search for the sawing sawing max valid length LVL LVL = L particle particle next firewood firewood product H = H + L top log top log no yes no log cutting H = HTot ? L = 0 ? yes output Fin files Capsis 2006 6

Simulation outputs Tree data file Log data file DBH x product data file volumes weights to be completed (prices...) Capsis 2006 7

Generic logging module GeoLog (experimental) Products anonymous (P1, P2...) custom products => derived product & panel class (e.g. Fagacées) Logging rules using basic stem geometry => TreeRadius_cmProvider () (min diameter, min length...) max diameter of branched core => TreeCrownBaseHeightProvider () min diameter of heartwood => adapt GeoLog class (e.g. Pp3) max diameter of juvenile wood (TreeXXProvider ?) custom rules => derived product & panel class (e.g. Fagacées) Outputs volumes by compartments weights (TreeWoodDensityProvider ?) => wood density model adapt GeoLog class other => derived export class Capsis 2006 8

Minimal requirements for using GeoLog <= TreeRadius_cmProvider () (required) <= TreeCrownBaseHeightProvider () (optional) Capsis 2006 9

Requirements for customising products and rules <= derived product class <= custom parameter <= default settings custom rules <= derived panel class Capsis 2006 10

Merci ! Capsis 2006 11

Capsis 2006 12

Capsis 2006 13

Capsis 2006 14

the end Capsis 2006 15