Practical guide for estimating the volume of a standing sample tree using either importance or centroid sampling

Wiant, Harry V.; Wood, G. B.; Grégoire, Timothy G.

doi:10.1016/0378-1127(92)90144-x

Cited by 19 publications

(7 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Wiant et al (1992) have published a simple exposition of how the method is applied.Their approach was folIowed here in describing it. This would allow measurernent of the volume of a section of the stem from which a particular size class of log might be cut.…”

Section: 4mentioning

confidence: 99%

Tree and Forest Measurement

West¹

2004

View full text Add to dashboard Cite

Section: 4mentioning

confidence: 99%

Tree and Forest Measurement

West¹

2004

View full text Add to dashboard Cite

“…However, volume is very difficult to measure directly (even more so when trees are standing) for this, volume is generally estimated from one or more variables that are positively correlated, such as height and diameter at breast height (GREGOIRE et al 1986, WIANT et al 1992. Stand volume can be obtained from individual tree models, resulting from the addition of all individual trees.…”

Section: Introductionmentioning

confidence: 99%

VOLUME AND TAPER EQUATIONS FOR COMMERCIAL STEMS OF Nothofagus obliqua AND N. alpina

Beltrán

Chauchard

Iaconis

et al. 2017

CERNE

View full text Add to dashboard Cite

Timber volume of standing trees is essential information for management decisions. The increasing need to optimize the potential capacity of forests maintaining their conservation, requires the quantification of the different potential possible timber products. The aim was to adjust taper equations to determine volumes of different timber products for commercial stems of Nothofagus alpina and N. obliqua. Trees of both species were randomly selected in harvesting areas of Lanin National Park (Argentina). Trees were felled and cut into commercial logs, measuring diameter with bark at different heights up to the beginning of the crown, and for each tree the diameter at breast height and total height. Five taper equations were selected and non-linear regression processes were employed for the fittings. We obtained the volume through the integration of the stem profile equation and the rotation in the space thereof through solid of revolution. The Bennet and Swindel (1972) model was selected for both Nothofagus species, obtaining similar equation parameters and differences were observed at the top of the stems of larger trees. For this the use of an integrated model is not recommended. With the obtained equations it is possible to: (i) estimate volume at different heights and for different commercial diameters, and (ii) predict the height at which both species reach to a certain diameter. The model presented some statistical limitations (e.g. multicollinearity), however, the fitting of the equation and the easy understanding of the outputs support it as a useful tool in a broad range of forest applications. EQUAÇÕES DE AFILAMENTO E VOLUME PARA TAMANHOS COMERCIAIS DE Nothofagus obliqua E N. alpinaRESUMO: O volume de madeira das árvores em pé é uma informação essencial para as decisões de gestão. A crescente necessidade de otimizar a capacidade potencial das florestas mantendo sua conservação, requer a quantificação dos diferentes possíveis produtos de madeira possíveis. O objetivo era ajustar equações de afilamento para determinar volumes de diferentes produtos de madeira para hastes comerciais de Nothofagus alpina e N. obliqua. As árvores de ambas as espécies foram selecionadas ao acaso nas áreas de colheita do Parque Nacional Lanin (Argentina). As árvores foram derrubadas e cortadas em troncos comerciais, medindo o diâmetro com a casca em diferentes alturas até o início da coroa, e para cada árvore o diâmetro na altura do peito e altura total. Foram selecionadas cinco equações cônicas e foram empregados processos de regressão não-linear para ajustar. Obtivemos o volume através da integração da equação do perfil do caule e da rotação no seu espaço através do sólido da revolução. O modelo de Bennet e Swindel (1972) foi selecionado para as duas espécies de Nothofagus, obtendo parâmetros de equação semelhantes e observando-se diferenças no topo das hastes de árvores maiores. Portanto, o uso de um modelo integrado não é recomendado. Com as equações obtidas é possível: (i) estimar o volume em diferentes alturas ...

show abstract

“…Tree volume inside bark was estimated using the centroid method [11,23], which requires height and DBH measurements as well as an additional diameter measurement at the centroid height (HC -third of tree height). Measurements for each tree in the 360-tree sub-sample included: (1) total tree height (HT), (2) diameter outside bark at breast height (DBH), (3) bark-thickness at breast height (BT -three sample points located equidistant around the stem), (4) centroid height (HC), (5) diameter outside bark at centroid height (DC), (6) bark-thickness (average of two measurements on opposite sides of each tree) at centroid height (CBT).…”

Section: Tree Volume -Centroid Methodsmentioning

confidence: 99%

“…Following the 15 year measurement of these trials, 360 sampletrees (drawn from across three sites and four taxa) were remeasured in order to determine the volume inside bark (VIB) of each sample tree using the centroid method [23]. Tree volumes obtained using the centroid method where subsequently used to derive volume equations for each taxon, at each site.…”

Section: Data Collectionmentioning

confidence: 99%

Productivity of Pinus elliottii, P. caribaea and their F1 and F2 hybrids to 15 years in Queensland, Australia

Dieters

Brawner

2007

Ann. For. Sci.

View full text Add to dashboard Cite

-Growth data are presented to 15 years of age from a genetic study involving factorial matings within and between P. elliottii var. elliottii and P. caribaea var. hondurensis, planted across three sites in southeast Queensland. Specific volume equations developed using the centroid method for each taxon/site combination as well as a generic (i.e. conical) volume equation, were used to estimate the mean annual increment (MAI) at 10 and 15 years of age. MAI estimated using the conical volume equation were downwardly biased by 18% in P. elliottii but the bias was less than 2% in P. caribaea var. hondurensis, and yielded different rankings of taxa at each site compared to the taxon/site specific volume equations. At all three sites, P. caribaea var. hondurensis and the F 1 and F 2 hybrids significantly exceeded the productivity of P. elliottii; however, differences between P. caribaea var. hondurensis and hybrid pine were generally small. Assuming a realistic contribution of the three site-types to the population of deployment environments, average MAIs for southeast Queensland were estimated as: 17. vigueur hybride / accroissement moyen annuel / équations dendrométriques / méthode centroïde / gain génétique

show abstract

Practical guide for estimating the volume of a standing sample tree using either importance or centroid sampling

Cited by 19 publications

References 8 publications

Tree and Forest Measurement

Tree and Forest Measurement

VOLUME AND TAPER EQUATIONS FOR COMMERCIAL STEMS OF Nothofagus obliqua AND N. alpina

Productivity of Pinus elliottii, P. caribaea and their F1 and F2 hybrids to 15 years in Queensland, Australia

Contact Info

Product

Resources

About