default.params: Default model parameters
In nuaquilue/QLDM: Quebec Landscape Dynamic Model

Returns a list with the Quebec Landscape Dynamic Model parameters and the default values

1	default.params()

A list with the following items:

year.ini: The inital year YYYY of the simulations
is.fuel.modifier: A flag to indicate that fuels flammability modifies target burnt area
is.clima.modifier: A flag to indicate that SEP (Spread Event day Probability) ratiomodifies target burnt area
th.small.fire: A threshold (in pixels) that determines which fires are small vs. large to assign fuel categories. When it is -1, all forest types burnt at high intensity
wflam: Weight of species flammability in fire spread rate calculation
wwind: Weight of wind factor in fire spread rate calculation
rpb: Modifier of spread rate to get probability of burn
pb.upper.th: When probability of burning >= pb.upper.th the grid cell always burns
ph.lower.th: When probability of burning <= pb.lower.ht the grid cell never burns
target.old.pct: Default target proportion of old (>= mature) forests to maintain inside management units
diff.prematurite: Number of years before maturity for stands salvaged even if not mature
salvage.rate.event: Maximal proportion of burnt mature forests that can be salvaged realistically in a given fire event [0,1]
salvage.rate.FMU: Maximum proportion of salvaged burnt wood allowed in the timber supply in each FMU [0,1]
hor.plan: Time horizon for timber supply calculations (by defaut, periods of 5 years, 5*24==120)
a.priori: Proportion of AAC to harvest (between 0 and 1). Allows the constitution of a buffer for attenuation of natural disturbance impacts on timber supply fluctuations. Not yet implemented in the current version.
replanif: A flag to indicate that timber supply calculation (i.e. recalculation of AAC level) is done at each time step to readjust harvest level to consider changes in FMU age structure (caused by fire) (a posteriori approach). If FALSE, AAC level it is calculated only once, durgin the first time step
timber.supply: String to indicate the unit of timber supply calculation, either "area.based" or "volume.based"
lutte: A flag to indicate the systematic forestation of conifer communities that become broadleaves communities following a perturbation
enable.succ: A flag to enable natural succession every 40 years (if FLASE, composition remains the same)
enfeuil: After clear-cut, for a percentage of conifer species (EPN and SAB), transform to pionner species (PET)
age.seed: Below this stand age, seed production is very low, and regeneration failures are more likely
p.failure: Probability of regeneration failure in young (< 50 years) burned stands ([0,1])
suboptimal: Tolerance for sub optimal conditions ([0,1])

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# Change the replanif parameter to not re-calculate sustainable timber supply levels every time step
params = default.params()
params$replanif = FALSE