Description Usage Arguments Value Examples
View source: R/loggingparameters.R
Advanced parameters of the logging simulator
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | 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)))
)
|
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
( |
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
|
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) |
A named list of 30 objects.
1 | loggingparameters(MinDBHValue = 5)
|
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