Description Usage Arguments Details
Compute exposure for a 'RasterStack' class object from package 'raster'
1 2 3 4 5 6 7 8 9 10 11 | brk_exposure(
RasterStack_dispersal,
sf,
key,
keyTime,
loss,
beta,
nbr_cores,
quiet,
unit
)
|
RasterStack_dispersal |
RasterStack. An object of class |
sf |
sf. And object of class 'sf' on which exposure is computed from the previous list of raster by patch 'RasterStack_dispersal'. See sf for details. |
key |
name of the column in 'sf' object providing emission amount |
keyTime |
name o the column of sf for time |
loss |
numeric. scalar or vector (of the same length as the number the timeline include is argument sf) to apply a loss on exposure cells. |
beta |
numeric. toxic adherence parameter between 0 and 1 (default = 0.4). |
nbr_cores |
integer. Set the number of cores to used for parallel computing. |
quiet |
boolean. Set 'TRUE' to remove progress bar. |
unit |
default is meter |
Local intensity depends of beta
and alpha
parameters.
Beta represents the toxic adherence between [0,1].
Alpha represents a list of parameters of the lost of toxic particules
due to covariates (precipitation).
There are two configurations to integrate the loss in the function :
(i) simulating covariate (simulate=TRUE) or (ii) uploading covariate (simulate=FALSE).
The covariate is linked to the loss by a linear regression with paramaters minalpha,
maxalpha, covariate_threshold.
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