Individual tree-diameter growth model for the Northeastern United States

Richard M. Teck; Donald E. Hilt

doi:10.2737/NE-RP-649

Treesearch

Individual tree-diameter growth model for the Northeastern United States

Informally Refereed

Authors:

Richard M. Teck, Donald E. Hilt

Year:

1991

Type:

Research Paper

Station:

Northern Research Station

DOI:

https://doi.org/10.2737/NE-RP-649

Source:

Res. Pap. NE-649. Radnor, PA: US. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 11 p

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Download (PDF 1.24 MB): https://research.fs.usda.gov/download/treesearch/21841.pdf

Abstract

Describes a distance-independent individual-tree diameter growth model for the Northeastern United States. Diameter growth is predicted in two steps using a two parameter, sigmoidal growth function modified by a one parameter exponential decay function with species-specific coefficients. Coefficients are presented for 28 species groups. The model accounts for variability in annual diameter growth due to species, tree size, site quality, and the tree's competitive position within the stand. Model performance is evaluated using the mean predicted error and the root mean square error. Results are presented for the calibration data and an independent validation data set. The model has been incorporated into NE-WIGS, a computerized forest growth model for the Northeastern United States.

Keywords

NE-TWIGS, diameter growth prediction, computer simulation, basal-area growth

Citation

Teck, Richard M.; Hilt, Donald E. 1991. Individual tree-diameter growth model for the Northeastern United States. Res. Pap. NE-649. Radnor, PA: US. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 11 p