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[email protected] Forrest Masters Assistant Professor Civil and Coastal Engineering Department 365 Weil Hall PO Box 116580 University of Florida Gainesville, FL 32611, U.S. Jason C. Grabosky Associate Professor Rutgers University Department of Ecology, Evolution and Natural Resources 14 College Farm Road, Room 144 New Brunswick, NJ 08901, U.S.
[email protected] Résumé. Le but était de déterminer comment différentes techniques d’élagage affectent le mouvement du tronc chez des chênes verts soumis à des vents d’ouragans. Le mouvement des arbres non élagués face au vent a été comparéà ceux dont la cime avait étééclaircie, réduite ou rehaussée. Vingt arbres ont été soufflés au moyen d’un générateur de vents jusqu’à 45 m/s maintenu pendant 3 minutes. Des senseurs tridi- rectionnels avaient été fixés sur les arbres à différentes hauteurs prédé- terminées le long du tronc pour mesurer sa déflection. L’éclaircissage ou la réduction de cime diminuait le mouvement de la section supérieure du tronc à toutes les vitesses de vents tandis que le rehaussement n’avait ©2008 International Society of Arboriculture
January 2008
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