treeProfile: Calculate volume for trees

In bcgov/FAIBBase: Basic functions for forest mensuration and ecology

Calculate volume for trees

Description

This function is to produce a tree trunk profile (i.e., inside bark diameter (DIB)). And summarize the whole stem volume (VOL_WSV) and merchantable volume (VOL_MER).

Usage

treeProfile(
  taperEquationForm = "KBEC",
  FIZorBEC,
  species,
  height,
  DBH,
  stumpHeight = 0.3,
  breastHeight = 1.3,
  UTOPDIB = 10,
  BTOPHeight = NA
)

Arguments

taperEquationForm	character, Specifies which taper equations will be used, currently support KBEC or KFIZ3. KBEC is the Kozak's equations (2002 version) based on BEC zone, tree sizes and species. KFIZ3 is the equations based on forest inventory zone (FIZ), tree sizes and species. Default is KBEC, if missing.
FIZorBEC	character, Specifies which FIZ or BEC (depends on taperEquationForm) zones the tree located in BC.
species	character, Tree species, must be BC species code.
height	numeric, Total tree height in meter.
DBH	numeric, DBH of the tree in cm.
stumpHeight	numeric, Defines stump height. If missing, 0.3 m is used.
breastHeight	numeric, Defines the breast height. If missing, 1.3 m is used.
UTOPDIB	numeric, Merchantable inside-bark diameter. If missing, UTOP is 10.
BTOPHeight	numeric, Height at broken top.

Value

A volume table

Note

For the volume between 0 and 0.3, also known as stump volume, the compiler calculates the volume as cylinder with the diameter of stump height. In the case of the diameter at stump height is less than diameter at breast height, the diameter at breast height is used as stump height. It calculates tree volume based on a 10 cm slices starting from 0.3 m tall using Smalian’s formula.

Author(s)

Yong Luo

See Also

treeVolume

Examples

## Not run: 
treeprofile_a <- treeProfile(FIZorBEC = "CWH",
                             species = "H",
                             height = 27.4,
                             DBH = 30.7,
                             BTOPHeight = 5.6)
treeprofile_b <- treeProfile(FIZorBEC = "CWH",
                             species = "S",
                             height = 37.3,
                             DBH = 42.3)
treeprofile_c <- treeProfile(FIZorBEC = "CWH",
                             species = "H",
                             height = 11.6,
                             DBH = 11.2)


## End(Not run)

bcgov/FAIBBase documentation built on June 19, 2024, 11:57 p.m.