Calculate the ratio between the turning moment coefficient before and after thinning in the stand.
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 | 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
)
|
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 ( |
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 |
ht |
Equivalent mean stand height: the level in the stand responsible for most of the momentum absorption (m). |
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