Calculate canopy fuel mass from DBH — calc_canopy_fuel

Calculates total foliage and fine twig mass. Two methods available:

Usage

calc_canopy_fuel_mass(
  dbh,
  species,
  allometric_params = get_default_allometric_params()
)

Arguments

dbh: Numeric vector. Tree diameter at breast height (cm)
species: Character vector. Species codes
allometric_params: List. Allometric parameters (from get_default_allometric_params)

Value

Numeric vector. Canopy fuel mass (kg, ovendry weight)

Details

**Miller (1981) method** (default, published equations): ln(W_foliage) = a + b * ln(DBH) Based on destructive sampling of pinyon-juniper trees.

**Crown volume method** (generic): mass (kg) = a * DBH^b

Method is determined by allometric_params$foliage_method.

References

Miller, Meeuwig & Budy (1981). USDA Forest Service INT-273. Biomass of Singleleaf Pinyon and Utah Juniper.

Examples

# Using Miller (1981) equations (default)
calc_canopy_fuel_mass(20, "PIED")
#> [1] 88.97332

# Multiple trees
calc_canopy_fuel_mass(c(10, 20, 30), c("PIED", "JUSO", "JUMO"))
#> [1]  21.78557  63.88874 134.77468

# Using generic crown volume method
params <- get_default_allometric_params(use_miller_foliage = FALSE)
calc_canopy_fuel_mass(20, "PIED", params)
#> [1] 109.2339