Skip to Main Content
Terrain shape index: quantifying effect of minor landforms on tree heightAuthor(s): W. Henry McNab
Source: Forest Science, Vol. 35(1): 91-104
Publication Series: Miscellaneous Publication
PDF: View PDF (851 KB)
DescriptionIn the southern Appalachians, the distribution and growth of trees are highly correlated with local topography, but the relationships have been ditficult to describe quantitatively. A quantitative expression of the geometric shape of the land surface (terrain shape index) is described and correlated with oventory tree heights and site quality. Application of the index in three even-aged stands of yellow-popular (Liriodendron tulipifera L.) on high-quality uniform sites shows that it is highly correlated with total height of trees in a stand, with 9 ranging from 0.45 to 0.74. In comparisons among stands, the index accounted for an average of 51% of the variation in site index. The relationship was validated in two supplementary stands and accounted for about 49% of variation in site index. The terrain shape index was more accurate in predicting tree height than was lateral shape class, a subjective measure of slope shape occasionally used in soil-site studies.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
CitationMcNab, W. Henry. 1989. Terrain shape index: quantifying effect of minor landforms on tree height. Forest Science, Vol. 35(1): 91-104
- Assessing age- and silt index-independent diameter growth models of individual-tree Southern Appalachian hardwoods
- Effects of Landform on site index for two mesophytic tree species in the Appalachian Mountains of North Carolina, USA
- Landform and terrain shape indices are related to oak site index in the Missouri Ozarks
XML: View XML