loggingparameters: Advanced parameters of the logging simulator

Description Usage Arguments Value Examples

View source: R/loggingparameters.R

Description

Advanced parameters of the logging simulator

Usage

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loggingparameters(
  MinDBHValue = 10,
  MaxAreaSlope = 27,
  MaxTrailCenterlineSlope = 22,
  MaxTrailCrossSlope = 4,
  GrappleMaxslope = 20,
  TreeMaxSlope = 22,
  PlateauMaxSlope = 5,
  SlopeDistance = 6,
  WaterSourcesBufferZone = 30,
  MinMainTrailWidth = 5,
  MaxMainTrailWidth = 6,
  ScndTrailWidth = 4,
  BigTrees = 50,
  CableLength = 40,
  GrappleLength = 6,
  IsolateTreeMinDistance = 100,
  FutureTreesMinDiameter = 35,
  TreefallSuccessProportion = 0.6,
  MinTreefallOrientation = 30,
  MaxTreefallOrientation = 45,
  TreeHollowPartForFuel = 1/3,
  Purge = 0.14,
  MaxTrailDensity = 200,
  MaxLandingArea = 1500,
  TreeHarvestableVolumeAllometry = function(DBH, aCoef, bCoef) aCoef + bCoef *
    (DBH/100)^2,
  TrunkHeightAllometry = function(DBH, TreeHarvestableVolume) TreeHarvestableVolume/(pi
    * (((DBH/100)/2)^2)),
  TreeHeightAllometry = function(DBH) exp(0.07359191 + 1.34241216 * log(DBH) +
    -0.12282344 * log(DBH)^2),
  CrownDiameterAllometry = function(DBH, TreeHeight, alpha, beta) exp(((log(DBH) -
    alpha - rnorm(length(DBH), 0, 0.0295966977))/beta))/TreeHeight,
  RottenModel = function(DBH) 1/(1 + exp(-(-5.151 + 0.042 * DBH))),
  VisiblyDefectModel = function(LogDBH) 1/(1 + exp(-(-3.392 + 0.357 * LogDBH)))
)

Arguments

MinDBHValue

Minimum DBH for inclusion in the forest inventory. Default = 10, in cm (double)

MaxAreaSlope

Maximum area slope for inclusion in a logging unit. Default = 27, in % (double)

MaxTrailCenterlineSlope

Maximum main & 2nd trail centerline slope. Default = 22, in % (double)

MaxTrailCrossSlope

Maximum main & 2nd trail cross slope. Default = 4, in % (double)

GrappleMaxslope

Maximum slope accessible by the grapple. Default = 20, in % (double)

TreeMaxSlope

Maximum slope around the tree to access it. Default = 22, in % (double)

PlateauMaxSlope

Maximum slope to define an area as a plateau. Default = 5, in % (double)

SlopeDistance

Distance over which the slope is calculated. Default = 6, in m (3m each side) (double)

WaterSourcesBufferZone

Buffer zone around the water sources. Default = 30, in m (double)

MinMainTrailWidth

Minimum main trail width. Default = 5, in m (double)

MaxMainTrailWidth

Maximum main trail width. Default = 6, in m (double)

ScndTrailWidth

2nd trail width. Default = 4, in m (double)

BigTrees

Minimum DBH of trees to be avoided by trails. Default = 50, in cm (double)

CableLength

Cable length. Default = 40, in m (double)

GrappleLength

Grapple length. Default = 6, in m (double)

IsolateTreeMinDistance

Minimum distance to consider a tree "isolated" from other trees of its species, in the aggregative species case (SpeciesCriteria, 'Aggregative' column). Default = 100, in m (double)

FutureTreesMinDiameter

Future trees minimum diameter. Default = 35, in cm (double)

TreefallSuccessProportion

Proportion of successful directional felling events. Default = 0.6 (double)

MinTreefallOrientation

Minimum orientation of the tree fall to the trail. Default = 30, in degree (double)

MaxTreefallOrientation

Maximum orientation of the tree fall to the trail. Default = 45, in degree (double)

TreeHollowPartForFuel

Proportion of hollow trees used as fuel wood . Default = 1/3 (double)

Purge

Part of the log no used for timber, can be used for fuel wood. Default = 0.14, in m^3 of purge/m^3 of volume of timber harvested. (double)

MaxTrailDensity

Maximum trail density. Default = 200, in m/ha (double) (has no impact on the simulation. A message will be sent to inform if this threshold has been exceeded)

MaxLandingArea

Maximum landing area. Default = 1500) in square meters (double) (has no impact on the simulation. A message will be sent to inform if this threshold has been exceeded)

TreeHarvestableVolumeAllometry

By default, allometry of tree harvestable volume, French Guiana ONF formula: aCoef + bCoef * (DBH/100)^2, aCoef and bCoef depend on the forest location, stored in ForestZoneVolumeParametersTable, DBH in cm. (function)

TrunkHeightAllometry

Allometry of trunk height, based on the cylinder volume formula: CylinderVolume = pi ((DBH/100)/2)^2 * H, with the height (H) in m and the DBH in cm (function)

TreeHeightAllometry

By default, allometry parameters estimated from Guyanese data with the BIOMASS package: ln(H) = 0.07359191 + 1.34241216 * ln(DBH) -0.12282344 * ln(DBH)^2, with the height (H) in m and the DBH in cm (function)

CrownDiameterAllometry

ln(DBH) = 𝜶+ 𝜷 ln(H*CD) + 𝜺, with 𝜺~N(0,σ^2) and mean σ^2 = 0.0295966977 with the crown diameter (CD), the tree height (H) in m, and the DBH in cm. (Aubry-Kientz et al.2019)(function)

RottenModel

Estimates the tree probability of being probed hollow (default: 1 / (1 + exp(-(-5.151 + 0.042 DBH))) with DBH in cm) (function)

VisiblyDefectModel

Estimates the tree probability to have visible defects. Default: 1 / (1 + exp(-(-3.392 + 0.357 * ln(DBH)))) with DBH in cm (function)

Value

A named list of 30 objects.

Examples

1
loggingparameters(MinDBHValue = 5)

thomasgaquiere/Maria documentation built on Dec. 24, 2021, 1:20 a.m.