Vmodule_individual: Estimates individual-tree volume inside bark based on taper...

In sgezan/Nothopack: G&Y Forest Simulator for Roble-Rauli-Coigue Stands in Chile

Description

It reads input of tree information (specie, DBH, HT), stand information (SPECIES, ZONE), and of specification of restrictions (dmin, blength), to estimate inside bark volume (m3) for the given tree based on different fitted taper equation models. Tree volume is calculated starting on stump (0.3 m) until one of the following is reached: 1) stem diameter limit (dmin), or 2) bole lenght (blength)

Usage

Vmodule_individual(
  SPECIES = NA,
  ZONE = NA,
  DBH = NA,
  HT = NA,
  dmin = NA,
  blength = NA,
  stump = 0.3,
  model = 2
)

Arguments

SPECIES	Species of the given tree (1:Rauli, 2:Roble, 3:Coigue)
ZONE	Growth zone (1, 2, 3, 4) of the stand
DBH	Diameter at breast height (cm)
HT	Total tree height (m)
dmin	Minimum stem diameter inside bark (cm)
blength	Bole length (m)
stump	Length of stump to discount (default = 0.3 m)
model	Model selected for taper equation (1:zone specific, 2:all zones) (default = 2)

Value

Volume of stem section without bark (m3) based on the restrictions provided

Author(s)

S.A. Gezan & P. Moreno

References

Gezan, S.A. and Ortega, A. (2001). Desarrollo de un Simulador de Rendimiento para Renovales de Roble, Rauli y Coigue. Reporte Interno. Projecto FONDEF D97I1065. Chile

Gezan, S.A. and Moreno, P. (2000b). INFORME MODELOS DE VOLUMEN. Reporte Interno. Projecto FONDEF D97I1065. Chile

Examples

# Example 1: Calculates tree volume for diameter limit of 5 cm (with stump of 0.3 m)
Vmodule_individual(SPECIES=1, ZONE=1, DBH=22.1, HT=18.2, dmin=5, model=1)

# Example 2: Calculates tree volume for a bole length of 6 m (with a stump of 0.3 m)
Vmodule_individual(SPECIES=1, ZONE=1, DBH=22.1, HT=18.2, blength=6, model=1)

# Example 3: Two ways to calculate total tree volume (with a stump of 0.3 m)
Vmodule_individual(SPECIES=1, ZONE=1, DBH=22.1, HT=18.2, dmin=0, model=1)
Vmodule_individual(SPECIES=1, ZONE=1, DBH=22.1, HT=18.2, blength=18.2, model=1)

# Example 4: Calculates total tree volume without discounting for stump
Vmodule_individual(SPECIES=1, ZONE=1, DBH=22.1, HT=18.2, dmin=0, stump=0, model=1)

sgezan/Nothopack documentation built on April 25, 2021, 8:03 a.m.