Lidar remote sensing of biophysical properties of tolerant northern hardwood forests
- 1 October 2003
- journal article
- Published by Taylor & Francis in Canadian Journal of Remote Sensing
- Vol. 29 (5) , 658-678
- https://doi.org/10.5589/m03-025
Abstract
Previous forest research using time-of-flight lidar data has primarily focused on forest ecosystems with conifers as the predominant tree type. In this study, small-footprint time-of-flight lidar data were used to estimate biophysical properties of tolerant hardwood forests composed predominantly of mature sugar maple (Acer saccharum Marsh.) and yellow birch (Betula alleghaniensis Britton) in the Turkey Lakes Watershed (TLW) near Sault Ste. Marie, Ontario. Ground reference data were collected during the first two weeks of July 2000 for 49 circular sample plots, each 0.04 ha (or 400 m2) in area. Lidar data were acquired on 24 August 2000 using an Optech ALTM 1225 (Optech Incorporated, Toronto, Ont.). Ten biophysical forest metrics were derived for each plot: (1) maximum tree height (hmax), (2) Lorey's mean tree height (hLorey), (3) mean diameter at breast height (DBH), (4) total basal area (BA), (5) percent canopy openness (CO%), (6) leaf area index (LAI), (7) ellipsoidal crown closure (CC), (8) total abov... Les recherches sur la forêt utilisant des données de temps de vol lidar se sont principalement intéressées dans le passé aux écosystèmes forestiers où les conifères constituaient l'essence prédominante. Dans cette étude, des données de temps de vol lidar à petite empreinte ont été utilisées pour estimer les propriétés biophysiques de forêts de feuillus composées d'espèces d'ombre, principalement d'érables à sucre matures (Acer saccharum Marsh.) et de bouleaux jaunes (Betula alleghaniensis Britton), dans le bassin versant de Turkey Lakes (TLW), près de Sault Sainte-Marie, en Ontario. Des données de référence au sol ont été collectées au cours des deux premières semaines de juillet 2000 pour 49 parcelles échantillons circulaires, chacune ayant une surface de 0,04 ha (ou 400 m2). Des données lidar ont été acquises le 24 août 2000 à l'aide d'un appareil Optech ALTM 1225 (Optech Incorporated, Toronto, Ont.). Dix métriques biophysiques forestières ont été dérivées pour chacune des parcelles : (1) hauteur maximu...Keywords
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