Alternative Method for Determining Trunk Diameter at Different Heights on a Standing Tree

Autor/innen

  • Madina H. Abishova Department of Forestry, 450 Atat rk Street, Azerbaijan State Agricultural University, Ganja, AZ 2000, Republic of Azerbaijan.
  • Brad M. Kard Department of Entomology and Plant Pathology, 127 NRC, Oklahoma State University, Stillwater, Oklahoma 74078-3033, USA. https://orcid.org/0000-0002-8155-7964 (nicht authentifiziert)
  • Kamil H. Hasanov Department of Forestry, 450 Atat rk Street, Azerbaijan State Agricultural University, Ganja, AZ 2000, Republic of Azerbaijan.
  • Zohrab S. Ismailov Department of Forestry, 450 Atat rk Street, Azerbaijan State Agricultural University, Ganja, AZ 2000, Republic of Azerbaijan.
  • Aygun X. Bagirova Department of Forestry, 450 Atat rk Street, Azerbaijan State Agricultural University, Ganja, AZ 2000, Republic of Azerbaijan.
  • Valeh K. Shukurov Department of Forestry, 450 Atat rk Street, Azerbaijan State Agricultural University, Ganja, AZ 2000, Republic of Azerbaijan.
  • Tarana S. Babakishiyeva Department of Forestry, 450 Atat rk Street, Azerbaijan State Agricultural University, Ganja, AZ 2000, Republic of Azerbaijan.
  • Iqbal A. Aliyev Department of Forestry, 450 Atat rk Street, Azerbaijan State Agricultural University, Ganja, AZ 2000, Republic of Azerbaijan.
  • Sima Z. Hasanova Department of Forestry, 450 Atat rk Street, Azerbaijan State Agricultural University, Ganja, AZ 2000, Republic of Azerbaijan.
  • Jeyhuna A. Hajiyeva Department of Forestry, 450 Atat rk Street, Azerbaijan State Agricultural University, Ganja, AZ 2000, Republic of Azerbaijan.
  • Vidadi S. Samadov Department of Forestry, 450 Atat rk Street, Azerbaijan State Agricultural University, Ganja, AZ 2000, Republic of Azerbaijan. https://orcid.org/0000-0002-2797-7247 (nicht authentifiziert)

Schlagwörter:

Calipers, dbh, diameter-at-breast-height, forest measurement and inventory, laser mensuration, error estimation

Abstract

Reliably determining trunk volume of a growing tree and accurately measuring changing diameters along the trunk at different heights are important data to foresters world-wide. Existing methods for determining trunk diameter of a growing tree assume the horizontal cross-section is a circle. However, to an observer standing beside a tree and looking upwards along the trunk, the imaginary cross-section of the trunk does not look like a circle but appears elliptical. As the observer stands closer to the tree and the higher the established point where the diameter of the trunk is measured, the elliptical shape of the cross-section becomes more pronounced. Conversely, the smaller the tree and the farther the observer stands from the tree, the imaginary cross-section of the trunk becomes more circular. In this paper we describe a method that makes it possible to accurately determine the diameter of a trunk regardless of the above two distance factors. Using the mathematical parameters of an ellipse, the objective of this study was to provide an accurate method to calculate the diameter at any height on the trunk.

Autor/innen-Biografien

  • Brad M. Kard, Department of Entomology and Plant Pathology, 127 NRC, Oklahoma State University, Stillwater, Oklahoma 74078-3033, USA.
    Professor; Dept. of Entomology and Plant Pathology, Oklahoma State University, Stillwater, OK 74078-3033? USA
  • Vidadi S. Samadov, Department of Forestry, 450 Atat rk Street, Azerbaijan State Agricultural University, Ganja, AZ 2000, Republic of Azerbaijan.
    Department of Forestry; Professor

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Veröffentlicht

2023-10-30

Ausgabe

Bd. 15 Nr. 2: MCFNS October 30, 2023

Rubrik

Growth & Yield and Quantitative Silviculture

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Zitationsvorschlag

Alternative Method for Determining Trunk Diameter at Different Heights on a Standing Tree. (2023). Mathematical and Computational Forestry & Natural-Resource Sciences (MCFNS), 15(2), 33-41(9). https://tmp.mcfns.com/index.php/Journal/article/view/15.5

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