Turning_Moment_Ratios: Turning Moment Ratio Functions

In tom-locatelli/fgr: R Version of the ForestGALES wind risk model

Description

Calculate the ratio between the turning moment coefficient before and after thinning in the stand.

Usage

tm_ratio_simple(spacing_before, spacing_current, years_since_thin)

tm_ratio_simple_ci(spacing_before, spacing_current, years_since_thin, ci)

tm_ratio(
  spacing_before,
  spacing_current,
  years_since_thin,
  cr_width,
  cr_depth,
  uguess,
  n_drag,
  c_drag,
  drag_upper_limit,
  ht,
  fgr_constants
)

tm_ratio_ci(
  spacing_before,
  spacing_current,
  years_since_thin,
  cr_width,
  cr_depth,
  uguess,
  n_drag,
  c_drag,
  drag_upper_limit,
  ht,
  ci,
  fgr_constants
)

Arguments

spacing_before	Mean spacing of trees in the stand before any thinning (m).
spacing_current	Current mean spacing of trees in the stand (m).
years_since_thin	Number of years after the latest thinning.
ci	Competition Index (bal, heg, none) used.
cr_width	Width of the crown of the "equivalent mean tree" in the stand (m).
cr_depth	Length of the crown of the "equivalent mean tree" in the stand (m).
uguess	Critical wind speed at canopy top calculated with the roughness or single-tree method (m s-1).
n_drag	N parameter of the drag coefficient formula (dimensionless).
c_drag	C parameter of the drag coefficient formula (dimensionless).
drag_upper_limit	Maximum wind speed used during the experiments from which n_drag and c_drag were derived (m*s-1).
ht	Equivalent mean stand height: the level in the stand responsible for most of the momentum absorption (m).

tom-locatelli/fgr documentation built on Oct. 2, 2020, 2:09 a.m.