fffdi: Finnish Forest Fire Danger Index
In ClimInd: Climate Indices

Description Usage Arguments Details Value Author(s) References

Implementation of the FFFDI for vector data

1	fffdi(pr, pet, Wvol.init = 0.5, z = 60)

`pr`	A vector of daily precipitation (in mm)
`pet`	A vector of daily (potential) evapotranspiration data (in mm).
`Wvol.init`	Initialization value for volumetric moisture, in the range 0.1-0.5. Default to 0.5 (very wet soil), but see Details.
`z`	reference surface layer thickness (mm). Default to 60.

Volumetric moisture The default is 0.5, indicating that the soil is very wet and near field capacity. This is so, assuming that the index is started in early spring. This value is applied to all locations as a spatially constant initialization value. However, Vajda et al. (2014, Table 1) provide reference values for different soil moisture conditions. This value ranges from 0.1 (very dry) to 0.5 (very wet).

A numeric vector containing FFFDI time series

Joaquin Bedia-Jiménez

Vajda, A., Venalainen, A., Suomi, I., Junila, P. and Makela, H., 2014. Assessment of forest fire danger in a boreal forest environment: description and evaluation of the operational system applied in Finland. Meteorol. Appl., 21: 879-887, DOI: 10.1002/met.1425

ClimInd documentation built on April 10, 2021, 1:06 a.m.