care4cmodel (version 1.0.3)

co2_eval_cutting: Fuel Consumption and CO2 Emissions for Cutting

Description

Given the output of a simulation run (i.e. an object of class c4c_base_result) as created with the function simulate_single_concept, the fuel consumption and CO2 emissions for cutting (i.e. felling, limbing, cutting the trees into logs) are calculated. Currently, this function assumes only harvester operations.

Usage

co2_eval_cutting(x, mode = c("standard", "nordic"))

Value

A data frame (tibble) with the columns time, harvest_type (damage or regular), phase_no, phase_name (numbers and names of the stand development phases), fuel_cutting_l_per_m3 (liters of fuel consumed per m3 of harvested wood), fuel_cutting_total_l (liters of fuel consumed in total), co2_cutting_total_kg (kg CO2 emitted).

Arguments

x

An object of class c4c_base_result

mode

Character string to choose between "standard" (default) and "nordic". For "standard", the function fuel_cons_harvester_1 is used. Hoewever, as this function does only provide values for operations with an average harvest tree diameter of 15 cm and more, the "nordic" function fuel_cons_harvester_2 with the option thinning = TRUE is used for smaller average tree sizes.
With the choice "nordic" only the function fuel_cons_harvester_2 is used. However, if the harvested volume per ha per operation amounts to 90% and more of the standing volume per ha of the respective stand development phase, which is virutally a clearcut, the option thinning = FALSE is used. In case of damage- induced harvest, only the option thinning = TRUE is in effect in order to account for the more difficult conditions of such harvest operations.

Examples

  base_out <- simulate_single_concept(
   pine_thinning_from_above_1,
   init_areas = c(50, 100, 10, 50, 150, 600),
   time_span  = 50,
   risk_level = 3
  )

  co2_eval_cutting(base_out, "standard")
  co2_eval_cutting(base_out, "nordic")